Problem with TX into my MMDVM Hat with 9700

Help with D-Star related issues
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n2zdb
Posts: 3
Joined: Sat Jul 18, 2020 1:57 am

Problem with TX into my MMDVM Hat with 9700

Post by n2zdb »

I have an Icom IC-9700 and for some reason am not able to get my RPi 3b MMDVM Hat to "show transmit" when using the 9700. The MMDVM works fine on Fusion but I must have a setup issue on the 9700??

What I am doing is transmitting low power on my 9700 at 443.5 MHz into my 3.5" Nextion Display MMDVM Hotspot. The display does not show my callsign and that I am transmitting - and of course nobody hears me. Receiving from my Hotspot is fine though on 443.5 MHz. However if I have time or info turned on it does send that info thru the net and show my callsign but that is not from my 9700.

Can any who is an expert with the 9700 tell me where the problem might be? I am registered and have stored the "B" and "G" callsigns in the radio too.

Thank you, Michael n2zdb
AF6VN
Posts: 821
Joined: Fri Jul 20, 2018 1:15 am

Re: Problem with TX into my MMDVM Hat with 9700

Post by AF6VN »

The most common problem would be that you did not define the hotspot channel as "digital repeater" using a 0.0 repeater shift (+ or - shouldn't matter).

You have to use a "repeater" configuration in order for the proper packet headers to be sent (your call sign, gateway call sign, and CQCQCQ target). In "digital voice" mode, only your call sign and CQCQCQ gets sent -- no routing information.

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AF6VN
Dennis L Bieber
n2zdb
Posts: 3
Joined: Sat Jul 18, 2020 1:57 am

Re: Problem with TX into my MMDVM Hat with 9700

Post by n2zdb »

Hi Dennis, How do I select a digital repeater function?

I thought I set up all that - I remember the 0 offset but not the digital repeater part. I have been spending a lot of time and still have no luck!

Thank you,

Michael n2zdb
n2zdb
Posts: 3
Joined: Sat Jul 18, 2020 1:57 am

Re: Problem with TX into my MMDVM Hat with 9700

Post by n2zdb »

Called a friend up this evening and we finally have it working on a regular memory.....not on a DR memory!

Will have to work with it some more tomorrow.

Michael
AF6VN
Posts: 821
Joined: Fri Jul 20, 2018 1:15 am

Re: Problem with TX into my MMDVM Hat with 9700

Post by AF6VN »

Can't help with actual settings of Icom stuff... I have Kenwood and the entry (as exported) looks like:

Wn World Region Cn Country Gn Group Callsign Gateway Lockout Name Sub Name Frequency Shift Offset Mode Uplink Tone Downlink Tone Position Lat DD Lat MM.mm N/S Lon DDD Lon MM.mm E/W Time Zone TH-D74A TH-D74E TH-D74 Aux 1 Aux 2 Aux 3

4 North America 51 USA 108 W8 AF6VN B AF6VN G Off Hotspot DV-Mega 446.25 + 0 Digital Off Off Exact 42 56.16 N 85 21.4 W -5:00 On Off Off

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AF6VN
Dennis L Bieber
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