Not sure if 7 AUX IN and 8 AUX OUT are for the audio. If they are then they are the preferred option. If not, then 4 MIC IN and 12 AUDIO OUT are a fallback choice for audio.
Pin 7 or 4 → 3.5mm TRRS ring 1 (RIG_AFIN)
Pin 8 or 12 → 3.5mm TRRS tip (RIG_AFOUT)
Pin 14 → 3.5mm TRRS ring 2 (RIG_PTT)
Pin 15 → 3.5mm TRRS sleeve (GND)
There may be a possibility for interfacing Digirig’s serial port with pin 9 for programming (CI-V?), but that needs more documentation on this functionality of the transceiver.
and to connect things this way within the RJ-45 to DB-15 adapter:
RJ-45 Connects to
Adapter Ritron
Terminal Wire Function DB-15 Pin Purpose
-------------------------------------------------------------------------
4 Ground (GND) 15 (GND) Common system ground
6 PTT (Push-to-Talk) 14 (PTT) Drops to initiate keying
5 Transmit Audio 7 (XmtAudio) Play .wav audio signal
Google Gemini believes that the AUX IN port is correct, not MIC IN. In its words, “The AUX IN path is designed specifically for line-level data devices, telemetry modems, and external sound systems. The MIC IN path is tailored exclusively for an electret or dynamic voice microphone capsule.”
I do not believe that the Ritron DTX+ HP Transceiver supports 3rd-party programming. It does support some programming with proprietary Ritron software and, within that, we can specify 8 selectable channels (frequencies) that it can transmit on. The 8 available channels map out across the DB-15 pins 1, 2, and 3 as follows:
Chnl CS2 (Pin 3) CS1 (Pin 2) CS0 (Pin 1) Action
1 0 (GND) 0 (GND) 0 (GND) Tie all three pins directly to Ground (Pin 15)
2 0 (GND) 0 (GND) 1 (Open) Tie Pin 2 & 3 to Ground; leave Pin 1 disconnected
3 0 (GND) 1 (Open) 0 (GND) Tie Pin 1 & 3 to Ground; leave Pin 2 disconnected
4 0 (GND) 1 (Open) 1 (Open) Tie Pin 3 to Ground; leave Pin 1 & 2 disconnected
5 1 (Open) 0 (GND) 0 (GND) Tie Pin 1 & 2 to Ground; leave Pin 3 disconnected
6 1 (Open) 0 (GND) 1 (Open) Tie Pin 2 to Ground; leave Pin 1 & 3 disconnected
7 1 (Open) 1 (Open) 0 (GND) Tie Pin 1 to Ground; leave Pin 2 & 3 disconnected
8 1 (Open) 1 (Open) 1 (Open)
Our intention is to program the frequency that we need on channel 8 and leave those pins alone.
We have already ordered the DigiRig parts and look forward to testing it out ASAP.
I wanted to post this update because I think that Gemini had the channel selection pins reversed earlier. I believe that the correct 8 channels map across the DB-15 pins 1, 2, and 3 as follows:
Chnl CS2 (Pin 3) CS1 (Pin 2) CS0 (Pin 1) Action
1 0 (Open) 0 (Open) 0 (Open) Leave all three pins completely disconnected
2 0 (Open) 0 (Open) 1 (GND) Tie Pin 1 to Ground; leave Pin 2 & 3 disconnected
3 0 (Open) 1 (GND) 0 (Open) Tie Pin 2 to Ground; leave Pin 1 & 3 disconnected
4 0 (Open) 1 (GND) 1 (GND) Tie Pin 1 & 2 to Ground; leave Pin 3 disconnected
5 1 (GND) 0 (Open) 0 (Open) Tie Pin 3 to Ground; leave Pin 1 & 2 disconnected
6 1 (GND) 0 (Open) 1 (GND) Tie Pin 1 & 3 to Ground; leave Pin 2 disconnected
7 1 (GND) 1 (GND) 0 (Open) Tie Pin 2 & 3 to Ground; leave Pin 1 disconnected
8 1 (GND) 1 (GND) 1 (GND) Tie all three pins directly to Ground (Pin 15)
