Re: Tune audio levels in DStar gateway #analog_bridge

Steve N4IRS

Set one Analog_Bridge to unity in both directions and use the other Analog_Bridge to set levels in and out.

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From: <> on behalf of Waldek SP2ONG <sp2ong@...>
Sent: Tuesday, September 10, 2019 7:02:31 AM
To: <>
Subject: [DVSwitch] Tune audio levels in DStar gateway #analog_bridge

[Edited Message Follows]


I would like to set the correct audio levels in my DStar gateway, where I use ircddbgateway / MMDVM_Bridge and 2 Ananlog_Bidges connected via USRP

A simple AB connection diagram is below
AB DMR                                                    AB DStar
[USRP]                                                       [USRP]
RX   <--------------------------------------------- TX
TX    ---------------------------------------------> RX
aslAudio = AUDIO_USE_GAIN                    aslAudio = AUDIO_USE_GAIN
dmrAudio = AUDIO_USE_GAIN                  dmrAudio = AUDIO_USE_GAIN
agcGain = 10                                              agcGain = 10
dmrGain = 0.35                                           dmrGain = 0.35

I would like to be sure that when I set the audio levels from DSTAR to DMR I need to correct it:

Tune in USRP_DSTAR agcGain  and dmrGain in USRP_DMR    ????

when I set the audio levels from DMR to DSTAR:

Tune  in USRP_DMR agcGain and dmrGain in USRP_DSTAR     ???

I would like to suggest whether it is correct or how to choose the right levels in both directions

73 Waldek SP2ONG

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