DMR Simplex 12.5KHz???
Posted: Tue Oct 17, 2023 2:00 pm
I have a simple question for the REAL DMR guru.
1) Does DMR Simplex work on TS1, TS2 or does not matter
2) Does DMR Simplex use the full 12.5KHz
I have conducted the following tests
I have a TYT MD398 which is Tier 1 only at 12.5Khz and talks quite nicely to my Anytone D878 on CC1 TG99.
I have a pi-star hotspot configured for TS1 but both radio and hotpot are configured for simplex operation.
Both the MD398 and the Anytone work just fine through the hotspot to the TGIF Server which shows them on TS2.
From the MMDVMHost log with the DMRGateway Rule TGRewrite0=2,16000001,1,1,999999
This should convert 16030232 on TS2 to 30232 on TS1
The MMDVM Board converts it back to TS2 or the radio on TS2 take over.
M: 2023-10-17 12:37:49.271 DMR Slot 2, received RF voice header from VE3RD to TG 16030232
M: 2023-10-17 12:37:50.399 DMR Slot 2, received RF end of voice transmission from VE3RD to TG 16030232,
The TGIF Server which shows it on TS2.
The radio is now set to TS1 and the log shows the following
M: 2023-10-17 13:18:27.044 DMR Slot 2, received RF voice header from VE3RD to TG 14030202
M: 2023-10-17 13:18:27.813 DMR Slot 2, received RF end of voice transmission from VE3RD to TG 14030202, 0.7 seconds, BER: 0.1%, RSSI: -47/-47/-
When I change the anytone radio to repeater mode, the radio no longer functions properly
My conclusion is that DMR Simplex does not use a 6.25KHz time slot but uses the full 12.5KHz and will receive any transmission on either TS1 or TS2
also does this mean a pi-star hotspot in simplex mode is also using 12.5KHz?
Can anyone shed some official light on this, Is there any documentation that can confirm or deny my conclusions.
Phil VE3RD
1) Does DMR Simplex work on TS1, TS2 or does not matter
2) Does DMR Simplex use the full 12.5KHz
I have conducted the following tests
I have a TYT MD398 which is Tier 1 only at 12.5Khz and talks quite nicely to my Anytone D878 on CC1 TG99.
I have a pi-star hotspot configured for TS1 but both radio and hotpot are configured for simplex operation.
Both the MD398 and the Anytone work just fine through the hotspot to the TGIF Server which shows them on TS2.
From the MMDVMHost log with the DMRGateway Rule TGRewrite0=2,16000001,1,1,999999
This should convert 16030232 on TS2 to 30232 on TS1
The MMDVM Board converts it back to TS2 or the radio on TS2 take over.
M: 2023-10-17 12:37:49.271 DMR Slot 2, received RF voice header from VE3RD to TG 16030232
M: 2023-10-17 12:37:50.399 DMR Slot 2, received RF end of voice transmission from VE3RD to TG 16030232,
The TGIF Server which shows it on TS2.
The radio is now set to TS1 and the log shows the following
M: 2023-10-17 13:18:27.044 DMR Slot 2, received RF voice header from VE3RD to TG 14030202
M: 2023-10-17 13:18:27.813 DMR Slot 2, received RF end of voice transmission from VE3RD to TG 14030202, 0.7 seconds, BER: 0.1%, RSSI: -47/-47/-
When I change the anytone radio to repeater mode, the radio no longer functions properly
My conclusion is that DMR Simplex does not use a 6.25KHz time slot but uses the full 12.5KHz and will receive any transmission on either TS1 or TS2
also does this mean a pi-star hotspot in simplex mode is also using 12.5KHz?
Can anyone shed some official light on this, Is there any documentation that can confirm or deny my conclusions.
Phil VE3RD