Kirisun DP770, TM840 & TR850 Programming Software

It’s probably a fair bet you’ve found this page whilst searching for the programming software for either the DP770 portable radio, TM840 mobile radio or the TR850 repeater from Kirisun.

The programming software for these models is the Kirisun CPSp. And the latest version (at time of writing) is v1.91.

Kirisun CPSp Programming Software

You can download the Kirisun CPSp Programming Software FREE OF CHARGE from our website here.

You will also need some programming cables…

Kirisun cables are hard to find in the UK. This information is for reference as we cannot supply these cables. The Kirisun DP770 requires the Kirisun KSPL-15 programming cable (if you can find one). The TM840 / TM880 mobile radios require a Kirisun KSPL-U21 programing cable (again, if you can find one). The TR-850 repeater requires a Kirisun KSPL-17 programming cable. The only place we managed to find one was on AliExpress.

Unfortunately, we have not been able to find an alternative cables. It appears only genuine Kirisun cables work. If you’ve found otherwise, please let us know in the comments section.


Kirisun PT568 Radio Programming Software

If you’re looking for programming software for the Kirisun PT568, stop right here. The correct programming software for the Kirisun PT568 is Kirisun KSP568 and the latest version is v1.04. And you can download it FREE.

Kirisun KSP568 v1.04

This software works with 4 versions of the Kirisun PT568 including 136-174MHz VHF (version 1), 420-470MHz (version 3).

You can download the Kirisun KSP568 FREE OF CHARGE from our website here.

You will also need a programming cable. We do not sell Kirisun compatible programming cables so we recommend that you purchase a cable on eBay. We have selected one here that we have tested.

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Kirisun PT558 Programming Software

The chances are that you’ve stumbled across this post as you’re looking for programming software for the Kirisun PT558 licence free two way radio. The software you need is Kirisun KSP20S. Read on…

Kirisun KSP20AS v2.44

You can download the Kirisun KSP20S FREE OF CHARGE from our website by clicking here.

You will also need a programming cable. We do not sell Kirisun compatible programming cables so we recommend that you purchase a cable on eBay. We have selected one here that we have tested.

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Hytera MD785 to MD785i Transition Announcement

Hytera has announced the replacement of the hugely successful MD785 with the MD785 (i for improved) model.

Hytera MD785i

A favourite for business users and HAM radio operators alike, the Hytera MD785 has proven a workhorse DMR two way radio. And with the release of the MD785i, the traction is definitely not set to slow down.

So what’s the difference? … I hear you ask…

One thing we can tell you is that the new MD785i comes preloaded with version 9 firmware which does have many feature updates and bug fixes. Hytera claims the new MD785i is even more powerful and versatile – presumably meaning in features – not actual RF power. But the most exciting new features are the Wireless Link and Full-Duplex Single Frequency Repeater (SFR) which was only previously possible on the PD985 portable. Of course both of these features do require a licence key installation in the radio – but nevertheless the MD785i is capable and it’s MD785 predecessor could not.

So to speculate, does this mean the rumoured Hytera PD785i will also have these features? Only time will tell.

> You can download a PDF brochure for the Hytera MD785i here.

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The Best Motorola Radios For Different Work Environments

In this blog I will be comparing different radios which provide the best benefits in different working environments. Teaching, construction sites and hospitality will be some of the environments that are mentioned in this blog. If you are wanting to know which radio to use that would fit best in your work place, then this should help you in your decision making.

Schools And Colleges

In schools and colleges, the teachers are responsible to keep all the students safe as well as teaching them, meaning a reliable radio is essential to keep in touch with your colleagues for all health and safety reasons. There are many variations when it comes to two way radios so buying or renting the right one for your needs is important. Different situations can require a radio when in a school atmosphere. School trips, fire drills and lunch are all very important times to have a two-way radio to keep constant communication with your colleagues.

The first two-way radio that is useful in all these situations is the Motorola XT420. This two-way radio is licence free which means it would be more useful for small schools or colleges because they have smaller distance requirements. The XT420 is a very simple and easy to use radio with only the essential features that employees require. Channel spacing and VOX (voice activation) comes programmed with the radio which means you can include or exclude channels from the scan and you can activate the audio just by using your voice making the radio itself very easy to operate. The XT420 is affordable and licence free, so it is very cost effective if you require a large amount of the radios. Licence free radios can only reach around 800 yards which could be most useful when the students are having their lunch or break. The limited range on the licence free XT420 is one of the reasons why the price is so low compared to a licence radio where the frequency can range around a mile long.

For larger schools and colleges, a two-way radio with a longer range may be needed therefore requiring a licence. So we recommend the Motorola SL1600 compact digital radio which is more expensive but for good reason, this because it comes with Lone Worker potential whilst also having the same channel scanning and VOX that comes with the XT420. The SL1600 can reach much further in range which is around a mile long, this could be very useful when on school trips. On a school trip, teachers and the students may split up into different groups when walking around meaning constant communication is essential to keep everyone safe, the SL1600 allows that but on a much larger scale. And because the SL1600 is a compact and small radio means that practically, it is a great radio because a teacher is not going to want a huge ‘construction site’ type radio on their waist when that sort of size is not needed.


Moving on to security, more requirements and features need to be met when it comes to the radio you wish to use and many of these features are available on the Motorola DP1400 which is an analogue/digital two-way radio. 16 channels are available on the DP1400 which is a reasonable amount for a security team. Being in security, a lot of situations can arise which can be dealt with quick when using some of the features on the DP1400, like the emergency button. The way in which an emergency button works is that once pressed, a signal will go to all of your colleague’s radios, this indicating that you are in need of assistance. This is not found on other radios like the ones previously spoken about on the schools and colleges section. The DP1400 has features that improve the audio quality and the connectivity like channel scanning, VOX and an accessory connector. This allows you to connect an ear piece with an integrated microphone meaning you can hear the audio directly to your ear and speak through the attached microphone minimising movement. The accessory allows your surveillance to be as discrete as possible which ultimately protects you as the security. There is not much more that goes into the DP1400 as it is a very simple two-way radio.

Although the Motorola DP2400e is more expensive it has many more features compared to the DP1400 which are available to be programmed into the radio. In analogue mode the DP2400e has 5 tone signalling which allows you to talk to the whole fleet or to one personal members, this can be essential if confidential information needs to be passed to another colleague. The DP2400e has an accessory connector that can be used the same way as the DP1400 which is great for discretion, but the DP2400e has a compact design which means it is smaller and even more discrete compared to the DP1400. Depending on the environment you may be working in, means you need to choose the type of band your radio operates on. If working in an open environment a VHF (very high frequency) radio is suffice, whereas if you may be working in a city or a built up area then a UHF (ultra high frequency) radio is what you need to breach the structures for a good audio connection. Both the DP1400 and the DP2400e is available with both of these frequency types.

Building And Construction

On a construction site a robust and reliable two-way radio is needed in case of any accidents when working at heights or dangerous environments and the Motorola DP4400e is the radio we recommend. The DP4400e comes with 32 channels which is accessible through two zones but along with that, comes many features that are useful when working on construction sites. This includes, Bluetooth, VHF or UHF, lone worker, 5 tone signalling, emergency button, transmit interrupt and much more that are listed on our Motorola DP4400e page. Some of these features are very helpful for your personal safety when working alone or at heights or if you have an accident like the previously mentioned emergency button which becomes useful to notify your fleet quickly. The radio itself is very strong and durable and has a great grip which prevents yourself dropping the radio.

If you are wanting a smaller compact two-way radio then we recommend the Motorola VX-261. Because of its size the VX-261 can be easier to hold and practically easier to use but it comes with a lot less features compared to the DP4400e. The connection and audio quality is very similar as both radios have channel scanning and VOX but if you’re not needing all the features available on the DP4400e then choose the more affordable and simple VX-261. Probably one of the most important features available on two way radios is the lone worker and this is available on the VX-261. The lone worker feature is able to send a pre-determined signal, for example a distress call or alarm, to other radios in range, and it requires some type of interaction from the radio user after a period of radio inactivity. This is useful when working and you need to know your colleagues are with their radio. Finally, both the DP4400e and the VX-261 are only acceptable to use with a licence.


When it comes to working in a hotel, restaurant or private events you may need less features like the emergency button and more features that require quick and simple connectivity. The Motorola SL4000e brings a great amount to the table when we talk about easy communication. As you can see on the picture that it has a keyboard and a large screen which allows you to send text messages from radio to radio. This can be very useful when you are part taking in any covert, sensitive environments because it means you won’t have to talk during a convention or a workshop when a guest is appearing and presenting to a large crowd. This ultimately allows your customers or guests to have the best service without any interruptions. As well as this the SL4000e has a lot of other features that come in handy when working. Integrated Bluetooth 4.0 LE for wireless and data, up to 1000 channels, UHF, covert mode, man down and enhanced privacy are just a few of the features that are available for the sleek and slim designed SL4000e.

Although the Motorola SL1600 has already been spoken about in the ‘Teaching and Colleges’ section, it does need to be mentioned now as it is a great cost effective alternative to the SL4000e. As it is so compact and small it can come in very handy when working in a hotel or restaurant because it wont get in the way when you are working. It has a few similar qualities to the SL4000e but it doesn’t have a screen. It has channel scanning and VOX which is available on most two way radios and it does have very clear audio. As we already know it is available with the Lone worker feature that could be useful when checking everyone in your fleet is with their radio and available to talk which is good for organisation. The SL1600 is much more affordable compared to the SL4000e but again, you will be loosing the screen and keypad feature.


If you are wanting any more information about the two way radios that have been mentioned, then see the links below to each of the radios specific page. To see pages specifically on each of these environments then go to our information page and click sectors.

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Hytera PD3 & PD4 Programming Software Versions 1 & 2 – What?

If you’ve reached this article the chances are that you’re wondering what is going on with Hytera’s lastest, non backwards compatible programming software release. Hytera, in their wisdom has decided to create a whole new version of their programming software for the PD3 and PD4 series. They’ve done the same for their PD5/6/7/9 series too, but this article concentrates only on the PD3 & PD4 programming software.

Watch this youtube video for an explanation about what they heck is going on!

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Icom Announces IC-SAT100 Satellite PTT Over Satellite Two Way Radio

Icom has announced the forthcoming launch of a Satellite two way radio in partnership with the worldwide pioneer of Satellite phones, Iridium.

Icom IC-SAT100 Satellite Radio

In a press release on their website, Icom announced that the new satellite two way radio would be launching in Q2, 2019.

Icom Says:

Icom Inc. has provided further details about the upcoming release of the IC-SAT100, Satellite PTT radio. This will begin with the introduction of this new model to the Japanese market in the second quarter of 2019.

The IC-SAT100 is Icom’s first Satellite PTT handheld radio that uses the Iridium satellite communication network. Unlike satellite phones, the IC-SAT100 will provide radio service to users with a push of the transmit (PTT) button. It can be used as a communication tool in remote, isolated areas where there are no mobile phones or landline network infrastructure, such as mountainous areas, remote islands and desert areas. Even if terrestrial network infrastructure is rendered unusable by human or natural disasters, satellite communication can provide a stable backup.

The IC-SAT100 uses the Iridium satellite network which covers the whole earth including both poles and can provide wide area global communication anywhere on the planet. Using 66 Low Earth Orbit (LEO) satellites, it provides low-latency communication and broader, more reliable network coverage compared to Geosynchronous Equatorial Orbit (GEO) satellites. The IC-SAT100 will be a suitable communication tool for governments, military forces, humanitarian organisations, multinational companies, and users that need communication in remote, isolated areas or for emergency assistance.

The statement goes on to say that Icom Inc. and Iridium will be displaying the IC-SAT100 on stand #1949 at the International Wireless Communications Expo (IWCE) in Las Vegas between March 4th and 8th, 2019.

There is also a downloadable document in PDF format which can be downloaded here.

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What Is The Alternative To The Motorola GP340?

In this blog post I will be talking about one of the two way radios that has been leading the market for nearly a decade… the Motorola GP340. If you would prefer, scroll to the bottom of the Blog post for a video summary made by Radiotronics!

What Is The Alternative To The Motorola GP340?

When looking at the dimensions and physical attributes to the GP340 we know that it stands at 137mm tall with a width of 57.5mm. The GP340 has been designed for a comfortable feel in your hand to minimize stretching or discomfort when reaching for the side buttons. Next, on the top of the radio is the antenna, the GP340 can have many different types of antennas but on the video, it showcases the whip and the stubby antenna. A cool fact about the GP340 and the DP1400 is that they have interchangeable antennas, something that isn’t seen on any other Motorola radio pairings. People are likely to use a certain type of antenna for practical reasons, or in a vain way to improve the aesthetics of the radio. The only benefit that can be seen is the whip antenna can offer a slight increase in range, other than this, there is no major difference between the whip and stubby antenna choice.


The GP340 has the possibility of 16 programmable channels, the Switch itself is marked very clearly with bright white numbers and marks which can be useful and easily seen in the dark. Next to this is the power switch which again has the white line across the switch to show clearly the volume level for your radio, when the switch is turned all the way left it is off, but when moved clockwise, you’ll hear a little click which means the radio is on. In order to select volume level, you just rotate the switch up and then back down to your preferred sound output. Another thing that featured on the top of the radio is the emergency button which can be programmed with other features, but this is most likely used for emergency situations as its easily accessible, also because it is red. The way in which an emergency button works is that once pressed, a signal will go to all of your colleague’s radios, this indicating that you are in need of assistance. Further, if one of the radio’s in the fleet has a display, like the Motorola GP680, it can be programmed to display the name of the radio in distress.

Moving on to the right side of the GP340 there is an accessory connector, This can be used with compatible headsets or earpieces. Having an earpiece with an integrated microphone connected means you won’t have to keep touching the radio itself to say something, or if you have to listen closely when there is a lot of background noise being made. If at any time there is not an accessory connected the radio, then a cover is attached protecting it from dirt, dust and water.

On the left side there are 4 buttons. To start off you will be able to see from the photo that there is a large button, this is known as the Push to Talk paddle or PTT for short, this is likely to be the most used button on the radio. The three other smaller buttons are programmable buttons which allow you to add features that best suit your needs. The GP340 was available with a choice of batteries ranging from a basic Li-Ion battery which would last around 8 hours, to larger batteries that can last up to 24 hours.

The next part of this blog post will be comparing analogue to digital two way radios, with our next choice being the Motorola DP4400e. This is the digital replacement for the GP340, similar in style but the only difference being the DP4400e possessing far more modern features to its older counterpart.


There are similar qualities between both radios like the emergency button. Again, this can be programmed with different features. On the DP4400e the switches are a little taller and thinner and they have deeper grooves around the edge which creates easier grip when holding them. The GP340 can be programmed with 16 channels whereas the DP4400e can programme 32 channels which will be accessed through two separate zones. So already, an improvement has been made with the DP4400e when compared to the GP340. Both radios feature 5 tone signalling. This allows you to either talk to the whole fleet or to personally talk one on one with a colleague. This feature is found on most two way radios but if you were going to switch to digital then you have reassurance that you’re not losing important features from the GP340. The GP340 and the DP4400e both have channel scanning, the same channel spacing and VOX (Voice Activation Capability). Both radios have a voice compressor which makes huge differences in the audio quality. The compression creates the whisper feature for the GP340 and the DP4400e, this means you are able to whisper through your microphone quietly but the audio is projected loud on the other side. This is an incredibly useful tool when working in covert and sensitive environments.

Lone Worker is a feature available on both radios. The lone worker feature requires you interact with the radio at intervals; and if you don’t – a call will be sent out to all radios within your fleet to notify colleagues that you may be in danger or even away from your radio at a dangerous or important time. This can be handy when on construction sites or when working as security. Moving on to the left side of both radio’s there are three small programmable buttons which means that they both have the same amount of potential when it comes to the features. The DP4400e has a remote monitor, a transmit interrupt feature and an optional extra, the Man Down feature – however most of these additional features are only available in digital mode – so once you’ve upgraded all of your GP340s to DP4400e’s – these additional features can be activated by simply reprogramming the radio. This shows how much more potential a digital radio has.

If you are using most or even all the features available for the GP340 and you wish to upgrade to digital then we would definitely recommend the DP4400e. Although, if you’re reading this and you’re realising that you don’t use half of the features or even any but still wish to switch to digital then we would recommend the cheaper and much more simple Motorola DP1400. This is from the same DP family as the 4400e, but it is much more simple. The DP1400 is pretty much a talk and receive radio, not a lot more goes into it, which is why it’s cheaper. There are less features that come with the DP1400 and this is why people see it as a cost effective version of the DP4400e.


To conclude, if you are wanting to switch from the analogue GP340 to digital then the DP4400e is the radio for you. But if you’re looking for a more simple digital radio because you don’t need the features then definitely go for the DP1400. It all just depends on your needs and your budget.

Below you can find my comprehensive video on the Motorola GP340, DP4400e and DP1400.

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SOLVED / SOLUTION – Prolific USB to Serial Issue – This Device Cannot Start (Code 10)

Over the last few years, mainly since the launch of MS Windows 8.1 and then MS Windows 10, some people have been having an issue with their Prolific USB to Serial programming cables. We’ve thoroughly investigated this issue and found that the solution on this page is the best solution that works in almost all circumstances when dealing with the This Device Cannot Start (Code 10) issue. By The way, there’s a video at the bottom of this page…

How To Identify The “This Device Cannot Start (Code 10)” Issue?

As seen in this screenshot, to identify your issue with your Prolific cable is the “This Device Cannot Start (Code 10)” Issue, you simply need to open device manager, look in the Ports (COM & LPT) category and look for the orange or yellow triangle next to your Prolific device. See the screenshot below.

SOLVED: Prolific USB to Serial - This Device Cannot Start (Code 10) Issue Solution

What Causes The Prolific Code 10 Issue?

The Prolific USB to Serial cable Code 10 (This Device Cannot Start) Issue is caused when the wrong driver is installed automatically by Microsoft Windows. As you can see in our video (see below), when we first plugged in our Prolific cable, Windows installed the latest driver version. However, the cable hardware pre-dates the latest driver. That means you have to backdate the driver to a previous version.

How Do I Backdate The Driver?

We have created a YouTube video showing exactly how to backdate your driver and solve the Code 10 (This Device Cannot Start) Issue. Take a look at the Youtube video.

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Kenwood TKR-D710 VHF & TKR-D810 Basic Repeater Programming Guide

The Kenwood TKR-D series repeaters are Kenwood’s DMR range of two way radio repeaters. Introduced in around 2015, the TKR-D range have become one of the radio communications industry’s leading repeaters. There are several versions available. However, for the purposes of this article, we’re going to concentrate on the “E” european versions, but the details in this article are also relevant to the “K” and “K2” versions of the Kenwood TKR-D repeaters.

Kenwood TKR-D710 TKR-D810 Repeater

Kenwood TKR-D Repeater Models


Tip: On our website, you can download a full and complete installation and functions guide for the TKR-D series repeaters free of charge.

Power & Spacing Options

All Kenwood KR-D repeater models work from a minimum of 5W to a maximum of 50W output power. Spacing is 12.5kHz (Narrow) or 25kHz (Wide 5k).

What You Need To Program The TKR-D710 VHF or TKR-D810 UHF Repeater

Here’s a list of everything you will need in order to program the TKR-D710 VHF or TKR-D810 UHF repeater.

1. Windows PC or Laptop

Kenwood software only works with Windows. Therefore you will need a PC or laptop running Windows 7 or above. We recommend at an Intel i3 with 4GB of RAM as a minimum to reduce the chances of buffer underrun.

Radiotronics recommends Lenovo Thinkpad T series laptops as our staff have been using them for over a decade. The Lenovo Thinkpad T series is robust, works and lasts. And the best part is that they’re relatively cheap 2nd hand. However, if you would like an even more robust laptop, we recommend the Panasonic Toughbook CF-53.

Tip for Mac Users: You can do this using a mac running VMware Fusion with a guest version of Windows 7 or above. But you must use only a USB cable (see below) and have USB passthrough switched on. This enables the USB cable to be passed directly to VMWare Fusion and through to windows bypassing your Mac altogether. Kenwood software does not work via Wine or any other emulation software.

2. Kenwood KPG-174D Programming Software

Quick Link: Kenwood KPG-174D

Kenwood KPG-174D

The correct programming software for the TKR-D710 VHF or TKR-D810 UHF repeaters is Kenwood KPG-174D. Kenwood KPG-174D is available from our website.

3. Programming Cable Options

There are two (or more) options for which programming cable you can use. It all depends on whether your PC or laptop has a RS-232 serial COM port. If you don’t know what a COM port is, then the chances are you don’t have one. In this case, skip to option 2 (USB).

Whatever cable you choose, they all do the same thing which is transferring data between your PC and your repeater.

3.1 Serial RS-232 COM Port Option

Quick Link: Kenwood KPG-46A serial cable and Startech USB To RS232 DB9 FTDI serial adapter cable

The most cost effective option of programming cable is the Kenwood KPG-46A serial cable. However, you will need a physical 9-pin D-sub port on your PC or laptop. The alternative, if you do want to use a serial cable and do not have a 9-pin D-sub serial port is to buy a Serial to USB cable. Kenwood used to make one called the Kenwood PCT-53U. However, Kenwood has since confirmed that it’s to discontinue this cable. So we sourced the Startech USB To RS232 DB9 FTDI serial adapter cable as an alternative. If all this seems too complicated – and it is – see the USB option below.

3.2 USB Option

Quick Link: Kenwood KPG-46U or Radiotronics KPG-46U-RT

As an alternative, Kenwood make an all-in-one USB cable. See the Kenwood KPG-46U on our website. This cable is supplied with a driver CD. However, if you already have a KPG-46U, you can download the driver free of charge here.

Tip: We also make a cheaper alternative to the Kenwood KPG-46U. You can see the Radiotronics KPG-46U-RT on our website.

Installing The KPG-174D Software

Important: We recommend you switch on file extensions as shown in this helpful article.

Extracting the Zip File: The Kenwood KPG-174D is supplied as a zip file. For those unfamiliar with ZIP files, a ZIP file is a file that contains a number of other files and or folders. For this, you can use the built-in “Extract All…” utility built into Windows 7, 8 and 10 – follow this guide here for instructions on how to do this.

Note: You can open a ZIP file like a folder in Windows 7 and above. If you’ve not Extracted the files, you’ve done it wrong and the installation will fail. Go back to the Extracting the Zip File section above and follow the procedure carefully.

Once you’ve extracted the files, a new window will open with the newly extracted files. Click into the folder structure until you see a file called setup.exe. Simply click on the setup.exe file to start the installation. Follow the steps until you get to the screen which asks you for Username, Company Name and Serial Number (could be different depending on language).

Enter your name in the Username field, your company name in the Company Name field (or your name again). Then in the serial number field you’ll have to enter the serial number you have. If you’re wondering where the serial number is, it’s usually in the unzipped folders in a file usually called Serial.txt (or Password.txt). Pop back to the file system and you’ll find it. Once you’ve entered this information, the installation will continue and complete. If your computer asks to restart, please do so.

Installing The USB Cable Driver

Have a serial cable? If you have the KPG-46A serial cable skip this step.

Assuming you have a Kenwood KPG-46U cable, you should now install the driver you downloaded from our website. Don’t have it? Download the KPG-46U driver here. Same as above – it’s a ZIP file. Extract All… and install the driver.

Have a Non-Kenwood Cable? Please follow the instructions that cable manufacturer gave you.

Be sure to install the driver before plugging the cable in, unless your cable manufacturer tells you to do otherwise.

Connecting The Cable

Tip: Please ensure you’ve installed the appropriate driver for your cable before plugging the cable in, unless your cable manufacturer tells you to do otherwise.

This diagram assumes you have a USB cable. But the same principle applies to the serial cable.Unlike Motorola repeaters, Kenwood does not allow a rear connection for programming. Connect the USB port to the computer and the RJ connector to the repeater’s microphone port.

Programming Cable Connection

Using the Kenwood PKG-174D Programming Software

Once PKG-174D is installed as mentioned above and the cable is connected as shown in the diagram above you’re ready to launch the Kenwood KPG-174D. To get started click the start menu and expand the Kenwood Fpu category and click on KPG-174D icon. The software will launch and will look something like this:

Kenwood KPG-174D

If you have experience with Kenwood radios, this may look familiar as most Kenwood programming software looks almost the same. But whilst all Kenwood software looks the same, they’re not the same. And specifically, these repeaters are both analogue and DMR repeaters so at the very least we need to consider whether we’re programming in digital DMR or analogue mode.

Step 1 – Setting the COM Port

Below are instruction for both serial cable and USB cable that enable you to find your COM port number.

Serial RS-232 9-Pin D-Sub Cable (KPG-46A) Instructions

If your PC or laptop has a RS232 9-pin D-sub serial port you might have chosen to use a KPG-46A serial cable. In this instance, you will simply need to find the COM port number that Windows has assigned to it. You can find the COM port number by opening device manager – here’s a great article on how to open the device manager in all versions of windows. Once device manager is open look for the Ports (COM & LPT) category. Expand this and look for a COM port device – it will look something like this:


99% of the time, the built-in COM port is COM1, that’s communications port number 1. But it could be anything depending on how your PC manufacturer configured your PC or laptop.

Can’t See It? If you’re 100% sure you have a built-in COM port and it’s not shown here. The chances are is it’s switched off in the BIOS. You’ll have to do a web search for instructions on how to access your computer’s BIOS and switch it on. Then come back to this guide, repeat this step and it should be shown as COM (some number).

USB Cable (KPG-46U) Instructions

Confusingly, even if you’re using a USB cable, this cable is a COM port emulator. So thet software requires you so set the COM port number. You can find the COM port number by opening device managerhere’s a great article on how to open the device manager in all versions of windows. Once device manager is open look for the Ports (COM & LPT) category. Expand this and look for a COM port device – it will look something like this:

Kenwood USB Cable COM Port

As you can see under the Ports (COM & LPT) category, is a device called Silicon Labs CP210x USB to UART Bridge (COM3). This may have a slightly different device description for different cables. But the bit we care about the most is the COM3 as this shows us the COM port number – number 3. If you have multiple COM device numbers, you can 100% verify this is your Kenwood cable by simply unplugging it – and the correct device will disappear and re-connect and it will re-appear.

Note: If you are using a USB cable and do not see your USB cable device in the device manager, you might have forgotten to install the driver. Stop here, download the driver free of charge here and come back to this guide once your cable is shown as correctly installed and shows a COM number.

Set The COM Port Number in KPG-174D Software

Once you’ve verified that you have a valid COM port in the device manager as shown above you’re now ready to tell Kenwood KPG-174D software which COM number you’ll be using. You do this by clicking Setup on the top menu, the selecting Communications Port Number (usually the first option). That will open a dialogue that looks like this:

Kenwood KPG-174D COM Port Select

Select your COM port number and click OK (depends on language).

Step 2 – Reading The Repeater

Whilst you can just select the model of your repeater by selecting Model on the top menu, this is not the best option as there’s always the possibility of getting it wrong – and then you won’t be able to write to your repeater which, believe me, is so frustrating. By far, best practice is to actually read the repeater to ensure we have the correct model open in our software.

To read the repeater, ensure your cable is connected and in the software click Program > Read Data from the Repeater from the top menu. Before the KPG-174D software reads the repeater, the following dialogue box will appear.

Kenwood KPG174D Read Dialogue Box

Leave everything exactly as you see it and click Read. You might get a message that says something like “would you like to save your existing file…” You have no need to save it, just click No. The software will proceed to read your repeater and open a new file in the KPG-174D software.

Assuming the repeater is brand new, the repeater will have opened a blank file to enable you to start programming your repeater.

Step 3 – Checking The Model

It’s best practice to check the model of your repeater before going any further forward. Assuming you’ve followed the steps of this guide and got to the stage where your repeater has been read and you have an open file in your software you can check the model by clicking Model from the top menu, then selecting the Product Information. This will pop open a box like the one shown below. As you can see, the model we’re using is the “E” european TKR-D810 440-470MHz model.

Kenwood KPG-174D Model Select

Step 4 – Program A Channel

There should be a dialogue open called Channel Information. If this is not open, select Edit from the top menu and select the Channel Information which is the first option. That will open the Channel Information dialogue box as shown:

Kenwood KPG174D Channel Information

If this not blank, simply click in the RX frequency box and hit the DEL key. This will clear each line. Next, click the Channel Edit button which will bring up a new dialogue.

Kenwood KPG174D Channel Edit

The first thing you’ll notice is that this is blank and totally grayed out except for the Channel Number and the Receive Frequency (MHz) box.

Type your Receive Frequency (RX) into the Receive Frequency (MHz) box and press the TAB keyboard key. This will move your cursor to the Transmit Frequency (MHz) box. Then simply type in your Transmit Frequency (TX). The frequency pair we’re using for this article are RX 450.0MHz and TX 445.0MHz to make it simple but you will be using whatever Ofcom has allocated to you.

Kenwood KPG174D Channel Edit (Completed 1)

Programming A Digital Channel

For a DMR channel, leave the setting exactly like this. The beauty of this repeater is that in DMR mode it will simply repeat whatever DMR “ID” it’s given as long as the colour code matches. So simply ensure the colour code matches on your radio and the DMR group ID set on your radio is the DMR group ID the repeater will broadcast. This repeater is now set to work in DMR digital mode. If this is all you needed, check the colour code is correct and jump to writing the repeater.

Programming An Analogue Channel

The first thing you’ll notice is the next box, Channel Type, already has DMR selected as the channel type. If you’re programming an analogue channel change this to Analogue and you’ll notice the QT/DQT boxes will light up. You can then select your CTCSS or DCS tones which have either been allocated to you (see your licence) or simply choose two that match. We have chosen CTCSS as 250.3 for this part of the article.

Kenwood KPG174D Channel Edit (Completed Analogue)

One thing that’s important to note here is that this repeater automatically checks the QT Reverse Burt option. We would usually disable  (uncheck) this unless it’s also checked on your radios – check your radios and be sure they match.

Tip: Remember that your radios need to exactly match this programming including the QT/DQT (CTCSS/DCS) values and the QT Reverse Burst and Channel Spacing, just with the TX and RX frequencies reversed.

A Note on Mixed Mode

This repeater is mixed-mode capable. That means it’s capable of listening out for both digital and analogue incoming signals. However, you have to tell it specifically whether to rebroadcast as analogue or digital DMR. Unless you really know what you’re doing it’s probably best to stick to analogue or DMR digital avoiding mixed mode.

Step 5 – Writing To The Repeater

Now that we’ve programmed the channel we needed – whether it was analogue or digital, we can now proceed to writing the settings to the repeater.

To write the data to the repeater, select Program from the top menu and select Write Data to the Repeater which will bring up the write dialogue box.

Kenwood KPG174D Write Dialogue Box

Simply click the Write button. The blue progress bar will start moving with the Block display counting from 0/261 to 261/261 when complete. It’s immensely important that you do not unplug the programming cable or switch off the repeater power during the programming write process.

No Antenna Warning

You must never ever allow a repeater to transmit without an antenna (or substitute such as a dummy load) plugged in as this could cause irreparable damage to the output stage of the transmitter part of the repeater.

That’s All Folks

We’ve come to the end of our article. There are some things we didn’t mention, such as this repeater’s ability to only listen on certain DMR groups and some other features. Although it’s quite long, this article is designed to be a basic step by step guide to getting your repeater up and running and not designed to be a comprehensive programming and function guide. If you would like a more in-depth guide, please download our comprehensive in-depth TKR-D710 / TKR-D810 installation and function guide.

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Author: Radiotronics Technical Team
Tel: 0871 288 2816


This article is designed to be a guide only. You modify and program your equipment at your own risk. Radiotronics Limited takes no responsibility for the accuracy of this article.

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