Satellite operation with 9700

…one more test you are probably interested in.

I have been rotating the RC-28 connected to Win4Icom continuously. The SatPC32 had no problem and showed the real RX/TX radio frequency every second (as the polling interval is setup at 1 second at the CAT menu of SatPC32). In other words, the SatPC32 has followed the RC-28 tuning and showed the real radio RX/TX frequency every second. If there was/was not the Doppler shift included into the showed frequency, I do not know, as I rotated quickly and had no further control.

As the SatPC32 uses a different serial CAT port than Win4Icom, it must have been the real Radio RX frequency read from the radio.

Using V2.03 apparently it will not go into duplex mode…i.e. VFO-A RX, VFO-B TX

Seems to put the radio in simplex mode and turns off VFO-B…is there a setting somewhere I should look?

Mike

Are you trying to turn on satellite mode or duplex?

Mike, please create a new topic for your issue (New Topic button at top of the window)

When you say VFOA/B, do you actually mean VFOA/B? The IC9700 has two receivers (Main and Sub) and each receiver has two VFOs (A/B)

I assumed it was ok to give information about satellite operation with the 9700… I figured out the settings required, however the satellite tracking software dosen’t seem to update Wfview after a point…

Following screen shots are of my working system (just did a QSO). I wish there was a simple way to mute the TX VFO…

Mike

Sorry, it’s a bit of a mixed thread and we’ve had a rash of people replying to random threads lately.

You might be able to get the audio you want if you select LPCM 1ch for the receive audio. This will be the audio from one VFO, but I am not 100% positive it will be the VFO you want. Give it a try and see.

–E
de W6EL

From what I understand of the docs…to get the ‘duplex’ mode we want for satellites, you need the 2ch… If I use the Icom software, I can mute the one channel and combine the other. I am sure I can manually do this in the windows mixer maybe…

I’ve never needed to monitor my transmit frequency (uplink) much during satellite operation. Only briefly to see that it isn’t in use I suppose.

Since I am using full duplex, I am using both VFOs - “RX Codec and TX Codec: Select the audio encoding scheme to use. The radio must support the selected stream. Use a 2ch (“stereo”) stream for radios that have dual VFOs (or if you are only using one VFO, use a 1ch stream.)”

Hello Elliott,

just a comment.

i) You are always monitoring the downlink frequency even if it is your voice being sent in the uplink direction as well.
ii) My opinion is that you need to monitor your voice coming from the linear (SSB) satellites to tune your radio (uplink direction) exactly to the needed downlink frequency. Therefore you need the full duplex audio transfer between the remote radio and your computer, one channel for RX and the other for TX. If you do not listen your voice coming from the SSB linear satellite you can be easily 300-1000Hz off the frequency, even more, and it complicates tuning for the other stations and consumes the sat passband unnecessarily. My personal view…

Martin
OK1YC

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As I test in satellite mode, it all seems to work fine…

however, the wfview display doesn’t really reflect what the radio is doing, which is a bit uncomfortable for remote use.

I will have to test my theory sitting next to the radio…but I think the frequencies are being updated, there are no errors in the log (just expected comments “FA” see pg23 of the 9700CI-V manual) it just doesn’t update the wfview display…I assume the correct bands are in use because the waterfall itself shows the MAIN downlink freq, and the freq display below the waterfall shows the SUB uplink.

However what bothers me is I think the mode is changing correctly (FM vs USB etc) but there is nothing on the display to reflect that. I assume that would ‘simply’ involve monitoring CAT commands and put up the appropriate indicator on the software display.

It ‘sounds’ like the modes change appropriately. (haven’t made an SSB contact yet to prove that)

Mike

Not sure what you mean by the mode isn’t being reflected by the display? If you change the mode in wfview, it will change the radio and request the current mode from it. If the mode change failed for any reason, then wfview will be updated with the correct mode

You guys keep talking about full duplex. Well duh. Nobody is suggesting otherwise.

But does full duplex include receiving on your UPLINK frequency? No. That it does not.

Full duplex in the context of ham radio satellites is hearing the downlink while you are transmitting.

Thus, 1CH audio provides FULL DUPLEX audio, allowing you to hear yourself.

2ch audio while transmitting does noting since the transmitting VFO is muted. Got it?

Maybe you can give your settings…when I have it set to 1ch the receive turns off when I transmit. When in 2ch the receive continues while I transmit.

The Icom software does the exact same thing…need to be in 2ch to hear the downlink while you transmit.

Mike

Hi Mike,

You may well be correct. I do not know why Icom wouldn’t put the downlink on the 1 Ch format (along with uplink transmit audio, full duplex of course). Clearly downlink audio is the priority for receive sound… Maybe there is a way to switch it? I think the 7610 can force the network audio to mono.

–E
de W6EL

The radio (9700) itself (through headphones) lets you merge the audio channels and has independant volumes so you simply turn down the TX side volume.

Past that…I have no idea.

Mike

BTW, this is what I (we?) mean when we talk about remote satellite operation. Wfview does work…any issues, I blame on the Icom side…however just prior to this video I had to restart Wfview…it was simply locked up…although I could hear audio.

Mike

I ended up building my own Pycom Radio Controller - Cover It has an example of it working with Gpredict full doppler: https://youtu.be/BbH3cdgckKA

I’ll check it out!

—E
de W6EL

As discussed above when updating the radio the screen flickers between the main/sub bands for reading and updating. I do this in a background thread and as far as the app is concerned it doesn’t see it/change the UI or the audio channel and so hidden away. The frequencies are still updated, but there’s no flickering as such.

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