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RF gain issue
Comments
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Do your S-meter still show S5? Are the s/w still show you are using the same antenna port as earlier? What does the SWR show when you transmit? I ask as this may help us to spot the problem.
/Lasse SM5GLC
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The SWR was fine and no the S meter showed S1 when the RF gain was all the way done. Suddenly now the radio is almost normal except the RF gain has no effect on the S meter reading.
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That is proper operation - the RF Gain should not affect the S-meter reading. There is a section in the SmartSDR manual on adjusting the RF Gain. I find that I occasionally need to adjust it depending on band conditions and time of day.
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Just to add one thing, by altering the BW you will see different reading on the S-meter. Going from 3kHz down to 300 Hz will show almost a 2 s-unit drop (i.e. 10 dB). This is for noise only.
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The S meter displays the signal strength (all signals the selected bandwidth) , unlike a traditional radio that measures the agc in the if stage to drive the S meter. On any radio if changing the rf gain affects the S meter, the s meter is inaccurate.
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K6JV
A few questions.
RFGain or AGC-T
What are the settings for both.
What bands?
What procedure are you using to adjust your AGC-T?
73, Mike
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HI Mike, whatever the issue was with the Maestro it fixed itself!
I use the published procedure to adjust AGC-T.
The issue was happening on all bands. The issue was that the S meter fell to S1 and the sensitivity of the receiver was way down. Adjusting the RF gain made the S meter go up and down.
The radio suddenly popped back to normal sensitivity and the S meter back to it's usual S5.
Weird🤬
1
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