Band Data from HL2 for VHF and up

[Philip Theis]

Greetings,

Is it possible to get any band information out of HL2 for any of the Transverter bands set up in XVTRs?

Thank you,

Phil K3TUF

[Matthew]

Hi Phil,

Which PC software are you using? Within the HL2 hardware/gateware what you describe is a feature, it depends if it is a feature of the PC software.

73 Matthew M5EVT.

[Phil Theis]

Thank you for the reply Matthew!

I am using the windows version of PowerSDR OpenHPSDR mRX v3.4.9.

In the past, when I used earlier hardware there were pins that I could drive a relay for automatic transverter/band selection. Do these exist on HL2?

73,

Phil K3TUF

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[Matthew]

I'm afraid I'm very unfamiliar with PowerSDR, but I can offer some general advice.

The N2ADR board has an MCP23008 IC, this talks to the HL2 PCB via i2c. This IC decodes the J16 filter settings sent by PowerSDR (see 2:01 here). Looking at the N2ADR schematic you will see that each of the band signals comes out (after decoding) to P1-P7. If you are comfortable making small prototype boards and/or Arduino type things, you could do something more clever.

However.... I don't know how PowerSDR treats XVTR and the J16 filter tab. But with a multimeter looking at P1-P7 on the N2ADR PCB, you could very quickly work out the behaviour of PowerSDR.

Good luck.

73 Matthew M5EVT.

[Ed Grafton]

I know that with SDR-Console, you can use CAT data for a TS-2000  to an arduino for decoding. It has transverter settings on it, too.

Ed

[Philip Theis]

Greetings and thank you for the replies. Further research reveals that the band data is conveyed on the I2C bus, presumably number 2, which appears on the edge 20 pin connector. This would be what will enable future VHF bands to the new project as well as the band data that arrives at the N2ADR filter board. I would like to set up my own decoder on the I2C bus. I am looking for someone who understands the information on that bus please.

Phil 

[Steve Haynal]

Hi Philip,

Take a look at this I2C bus extender project for the Hermes-Lite:

https://github.com/pressla/I2C-Bus-extender

It is linked on the github community projects wiki page:

https://github.com/softerhardware/Hermes-Lite2/wiki/Community-Projects

Also, take a look at this 100W amplifier and forks of it. They repurpose the I2C:

https://github.com/mathisschmieder/HL2-MRF101

The schematic has I2C addressing information on it:

http://www.hermeslite.com/

The hermeslite.py code has commands which write to the I2C bus from software:

https://github.com/softerhardware/Hermes-Lite2/blob/master/software/hermeslite/hermeslite.py

Finally, go to the web-based interface for this list and search for i2c:

https://groups.google.com/g/hermes-lite

73,

Steve

kf7o

[Michael Durkin]

Sorry Steve, 

Sometimes when i hit reply , i miss the fact that message is not going to the group ...

On Sat, Aug 7, 2021 at 11:07 PM Steve Haynal <st...@softerhardware.com> wrote:

Hi MIchael,

Sorry. I almost overlooked this e-mail as it wasn't to the group. Can we move this discussion to the group?

Matthew has implemented the band voltage method:

https://github.com/softerhardware/Hermes-Lite2/wiki/Band-Volts

73,

Steve

kf7o

On Mon, Aug 2, 2021 at 10:44 PM Michael Durkin <kc7...@gmail.com> wrote:

I know that there has been alot of discussion covering band data via I2C and  RS-232 control.

I would suggest the band data similar to another qrp radio, namely the FT-817/.818 which uses a DC voltage for band information. It is setup for usable information into the UHF band.

KC7NOA

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