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6400 tune not working in SSB
Lionel
Member ✭✭✭
6400 Tune function not working in SSB
This morning if found my 6400 with no tune output in USB or LSB (no ATU), but tune output was normal on CW. My CW pitch 500hz. Low cut SSB 250hz. Band did not matter. Profile same as last night. A slice 14.020/B slice 7.245.
I had never seen this before today.
I noticed the TX EQ was on, though 500hz was at +4db. I turned the TX EQ off and SSB tune output was okay. Frequency A/B 14.020/7.245.
Then I turned the TX EQ on again and now the SSB output was okay. I could not replicate the no power out in tune on SSB with any EQ adjustments.
The 6400 was off and powered up first thing this morning. Boot seemed normal, SSDR startup seemed normal.
Running 2.4.9, W10 1803, ethernet direct from 6400 to computer.
It seems like a one off oddity but maybe this will save someone else's time.
This morning if found my 6400 with no tune output in USB or LSB (no ATU), but tune output was normal on CW. My CW pitch 500hz. Low cut SSB 250hz. Band did not matter. Profile same as last night. A slice 14.020/B slice 7.245.
I had never seen this before today.
I noticed the TX EQ was on, though 500hz was at +4db. I turned the TX EQ off and SSB tune output was okay. Frequency A/B 14.020/7.245.
Then I turned the TX EQ on again and now the SSB output was okay. I could not replicate the no power out in tune on SSB with any EQ adjustments.
The 6400 was off and powered up first thing this morning. Boot seemed normal, SSDR startup seemed normal.
Running 2.4.9, W10 1803, ethernet direct from 6400 to computer.
It seems like a one off oddity but maybe this will save someone else's time.
0
Comments
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Maybe has nothing to do with EQ.
Accidentally found the following scenario trying replicate the issue related to the EQ.
Setup
Connected to DL
6400 boot to On following power disconnected state
SSDR running - Slice A 14.028(CW) Slice B 14.305(Active SSB)
TX and RX EQ off
Power Set 100W out
Tune set 10 W
Ethernet 100%
select tune (slice B active and TX set) = 10W out - TX signal on spectrum.
1. exit SSDR - exits normally
2. restart SSDR - finds 6400 and starts normally.
3. Now slice A is set to transmit. Slice A 14.028(CW) Slice B 14.305(Active SSB) The change to slice A TX on restart seems odd.
4. Set slice B to transmit.
5. Select Tune
6. Tune output is zero
7. Move slice B VFO 50hz - change nothing else
8. Now slice B is 14.304.950
9 Select Tune
10. Tune output is 10W.
It seems as though moving SL-B frequency any amount corrected the no tune output back to normal function.
I have seen something similar to this before but it seemed related to the WNB and noise floor (never replicated at Flex) Flex believed it to be a hardware issue - Maybe its SSDR corrupted (W10x64 - 1803)
I do not believe is is Profile related since I have used different profiles with the same result.
Perhaps this calls for a removal and complete reload of SSDR. Maybe??
I'm wondering if anyone can replicate this behavior. There are hundreds of scenarios so maybe this is just one that is a bit odd.
Apologies for the detail level but there are A LOT of variables.
0 -
When it doesn't tune is the tune button grayed out?0
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No, the tune button was not grayed out. I double checked that the TX Inhibit was disabled.
0 -
I asked because sometimes when I first start SSDR my MOX and TUNE buttons are grayed out and I just have to reload my profile to fix it.0
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I haven’t seen that but I do wonder about my profiles though how this effect would come profiles seems like a mystery. The only time I see them grayed out is when I have intentionally enabled transmit inhibit.0
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