Does anyone have any experience with this? Any other DMR radios out there advertising this function?
Retevis P1 high power DMR handheld
Retevis P1 high power DMR handheld
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Single Frequency Repeater function on new DMR handheld???
- Thread starter gkjunk757
- Start date
It uses both time slots, repeating TS1 on to TS 2 and vis versa.
nd5y
Member
Some AnyTone models have it.
Simultaneous.
Ubbe
Member
It's not a duplex radio that can transmit and receive at the same time. It only receives in one timeslot and only retransmits the data on the other time slot. It will still have a pulsating transmission mode where it alternates between receive and transmit.
/Ubbe
/Ubbe
Yes, but since it's TDMA it will *appear* to be receiving and retransmitting simultaneously.
SFR (single frequency repeater) is a great idea and my it is works well when properly implemented. The AT578 (any tone dual band dmr mobile) technically supports SFR, and my testing suggests it does work, but it appears to work very poorly. That is, the receiver is deaf and this is consistent with what I have read about the AT578. On the other hand, some commercial radios, like a few Hytera radios can support SFR and do so properly.
Years ago, I corresponded with a HAM in the UK who was running a 70cm SFR and it worked well. I forget what commercial radio he was using as the SFR, but if memory serves, he worked in the industry and it was some type of motorola.
Bottom line, SFR is a viable concept, if the radio implements it properly.
Years ago, I corresponded with a HAM in the UK who was running a 70cm SFR and it worked well. I forget what commercial radio he was using as the SFR, but if memory serves, he worked in the industry and it was some type of motorola.
Bottom line, SFR is a viable concept, if the radio implements it properly.
Hi all I use a belfone BF AT8250R VHF mobile radio and does sfr with 30watts
This is an excellent radio and looks like a hytera all functions are enabled
headsense
Member - Learner Driver
Also use Belfone BF-TM8250R SFR 30WATT UHF mobile radio. working well so far, early days of testing extreme range limits and reliable handling capability of high volume of active suscribers units working through SFR. (Hytera suscribers PD and MD series)
- Joined
- Sep 24, 2015
- Messages
- 1
I’m interested in getting one of these. Are you using an actual Belfone or one of the E-bay/Alixpress knockoffs? I’m open to buying either but I can only seem to find the ebay/aliexpress ones. I have a handful of Hytera ht’s and I want to use its SFR capability.
Whichever you have are you still liking it a month later?
headsense
Member - Learner Driver
@timeinthefield yes so far so good with my SFR using Hytera PD662 and MD782 suscribers. A couple of points to date.
1. Field testing has not been extensive as yet due to other commitments and what I wanted to specifically experience is the SFR ability to cope with multiple suscribers at once hammering the SFR and see if it trips up at all in terms of assigning slots and handling users talking direct but also via repeater within a user group. Simple 1 to 1 users at distance, so definetly through repeater, and using "hytera compatibility mode" in the SFR and "psuedo trunk" in the suscribers, its solid and works well to date. Distance has been 7-10 kilometres so far in high density metropolitan enviroment. The farthest distances being relatively clear and above major obstruction e.g hillside to hillside portable (10klm)>SFR>(1klm) portable. In addtion some shorter range sucess walking the neighbourhood and surrounds with portables.
2. I'm using ARC4 encryption on suscribers and also the SFR and it passes through and works quite happily.
3. Short message service I need to test more. My testing is not conclusive as yet but suscriber to suscriber via the SFR appears not to to pass through sucessfully at range all the time but I'm not doing diciplined testing, it is opportune testing when i am travelling or located at testing distances and locations. Suscriber to suscriber and suscriber to SFR SMS is working fine. I must note though the message delivery failures have occurred using portable >SFR> portable at roughly 10 kilometres portable and sending inside vehicle. I really cant claim a problem here until I test again properly using portable>SFR>mobile OR mobile>SFR>mobile and some method and discipline to consider the terrain and variables. In any case messaging is not a must have but is a useful function to have.
4. The Belfone BFDX SFR has two modes when setting up an SFR channel "hytera" or "motorola" compatibility in CPS. I need to explore this in more detail as the CPS HELP file is not available. I have Motorola DP/DM series suscribers and Tait TM/TP9300 suscribers also to test with in time. I suspect the compatibility mode is related to the differences in how each brand manage "true TDMA". Hytera using psuedo trunk it manages slot allocation automatically or can be assigned priority slot everytime if set accordingly. Motorola implentation is slightly different and Tait appears to use same or similar logic to allow compatibility on a Motorola based suscriber system. So currently with limited testing as described above Hytera or Motorola suscribers work with Belfone SFR but mixing them together and then in a high use / load scenario, can it be done and will it function at 100% reliability in terms of traffic managment / pass through.......... good question. I will note on this matter specifcally I am still learning the nuances of each suscriber brand as they are all ETSI DMR compliant but also have brand specific differences and methods of function implentation. The terminology used is conflicting / confusing at times between brands for essentially the same functions at times.
5. Belfone BFDX - the SFR I have purchased was through a Chinese vendor on ebay who appears to sell about 75% of the Belfone analogue and DMR Tier 2 product lines portable and mobile. The mobile SFR unit I received came very quickly via air freight, was supplied in full factory packaging including warranty card and firmware/product labels, included a factory programming cable assembly to suit and the vendor provided the appropriate BFDX branded CPS which is a mutli dmr model program. Labelling on the machine indicates Nov 2024 manufacture date and the quality is easily equal to Hytera product I have experienced. With all tools in hand I had it up and running within 2 hours of receiving hadware. I program on an old Dell desktop running Windows 7 64bit as it was the first machine I sat in front of that day.
I beleive i have purchased a genuine Belfone BFDX product, however, I also believe this specific model SFR is a China domestic market specification equipment OR bulk wholesaler specification or similar and this is not unusual, it keeps the price point lower then selling a Global commerical model or its a spec'd down model specifically for consumer end user sales . You've prompted me to remember to send my completed warranty card to the actual manufacturer just to see if i get a response and perhaps i will ask for a point of service if i require it in the future.
Further I think the product is genuine but domestic / consumer harware specification because the global model specification is what Belfone advertise in brochures, websites, youtube and that specific radio is badge engineered in some countries under a different local name but same global spec. The most obvious thing is domestic model 160 channels, global model 1064 channels capacity, addtional feature entitlements as options not installed. Little details like that. Further I did some googling from the packaging and found the seller location and store front selling hardware in China in one of the large trading / manufacturing districts. End of the day its DMR Tier 2 compatible with SFR functionality out of the box.
Since then I believe I have also found the same sellers store on Ali Express where the cost to do business is much more competitive for Chinese sellers and usually in turn the sharper price point for buyers. There are also maybe 2-3 addtional stores selling the same Belfone BFDX product lines. I think it is genuine product from either source but I really dont give a monkeys at the end of the day. It works, the physical quality is very good, the communication was easy/timely and I got exactly what I ordered in 10 days by air freight. As always buyer beware individual user experience may vary. I have a lot of experience with/avoiding chinese knock off EOL Motorola products so appreciate your thoughts/concerns in that regard and simply share my experience / thoughts. I reckon it would pass an analyzer test too but i dont have that capacity at the moment.
1. Field testing has not been extensive as yet due to other commitments and what I wanted to specifically experience is the SFR ability to cope with multiple suscribers at once hammering the SFR and see if it trips up at all in terms of assigning slots and handling users talking direct but also via repeater within a user group. Simple 1 to 1 users at distance, so definetly through repeater, and using "hytera compatibility mode" in the SFR and "psuedo trunk" in the suscribers, its solid and works well to date. Distance has been 7-10 kilometres so far in high density metropolitan enviroment. The farthest distances being relatively clear and above major obstruction e.g hillside to hillside portable (10klm)>SFR>(1klm) portable. In addtion some shorter range sucess walking the neighbourhood and surrounds with portables.
2. I'm using ARC4 encryption on suscribers and also the SFR and it passes through and works quite happily.
3. Short message service I need to test more. My testing is not conclusive as yet but suscriber to suscriber via the SFR appears not to to pass through sucessfully at range all the time but I'm not doing diciplined testing, it is opportune testing when i am travelling or located at testing distances and locations. Suscriber to suscriber and suscriber to SFR SMS is working fine. I must note though the message delivery failures have occurred using portable >SFR> portable at roughly 10 kilometres portable and sending inside vehicle. I really cant claim a problem here until I test again properly using portable>SFR>mobile OR mobile>SFR>mobile and some method and discipline to consider the terrain and variables. In any case messaging is not a must have but is a useful function to have.
4. The Belfone BFDX SFR has two modes when setting up an SFR channel "hytera" or "motorola" compatibility in CPS. I need to explore this in more detail as the CPS HELP file is not available. I have Motorola DP/DM series suscribers and Tait TM/TP9300 suscribers also to test with in time. I suspect the compatibility mode is related to the differences in how each brand manage "true TDMA". Hytera using psuedo trunk it manages slot allocation automatically or can be assigned priority slot everytime if set accordingly. Motorola implentation is slightly different and Tait appears to use same or similar logic to allow compatibility on a Motorola based suscriber system. So currently with limited testing as described above Hytera or Motorola suscribers work with Belfone SFR but mixing them together and then in a high use / load scenario, can it be done and will it function at 100% reliability in terms of traffic managment / pass through.......... good question. I will note on this matter specifcally I am still learning the nuances of each suscriber brand as they are all ETSI DMR compliant but also have brand specific differences and methods of function implentation. The terminology used is conflicting / confusing at times between brands for essentially the same functions at times.
5. Belfone BFDX - the SFR I have purchased was through a Chinese vendor on ebay who appears to sell about 75% of the Belfone analogue and DMR Tier 2 product lines portable and mobile. The mobile SFR unit I received came very quickly via air freight, was supplied in full factory packaging including warranty card and firmware/product labels, included a factory programming cable assembly to suit and the vendor provided the appropriate BFDX branded CPS which is a mutli dmr model program. Labelling on the machine indicates Nov 2024 manufacture date and the quality is easily equal to Hytera product I have experienced. With all tools in hand I had it up and running within 2 hours of receiving hadware. I program on an old Dell desktop running Windows 7 64bit as it was the first machine I sat in front of that day.
I beleive i have purchased a genuine Belfone BFDX product, however, I also believe this specific model SFR is a China domestic market specification equipment OR bulk wholesaler specification or similar and this is not unusual, it keeps the price point lower then selling a Global commerical model or its a spec'd down model specifically for consumer end user sales . You've prompted me to remember to send my completed warranty card to the actual manufacturer just to see if i get a response and perhaps i will ask for a point of service if i require it in the future.
Further I think the product is genuine but domestic / consumer harware specification because the global model specification is what Belfone advertise in brochures, websites, youtube and that specific radio is badge engineered in some countries under a different local name but same global spec. The most obvious thing is domestic model 160 channels, global model 1064 channels capacity, addtional feature entitlements as options not installed. Little details like that. Further I did some googling from the packaging and found the seller location and store front selling hardware in China in one of the large trading / manufacturing districts. End of the day its DMR Tier 2 compatible with SFR functionality out of the box.
Since then I believe I have also found the same sellers store on Ali Express where the cost to do business is much more competitive for Chinese sellers and usually in turn the sharper price point for buyers. There are also maybe 2-3 addtional stores selling the same Belfone BFDX product lines. I think it is genuine product from either source but I really dont give a monkeys at the end of the day. It works, the physical quality is very good, the communication was easy/timely and I got exactly what I ordered in 10 days by air freight. As always buyer beware individual user experience may vary. I have a lot of experience with/avoiding chinese knock off EOL Motorola products so appreciate your thoughts/concerns in that regard and simply share my experience / thoughts. I reckon it would pass an analyzer test too but i dont have that capacity at the moment.
