Re: S Meter no signal

Dale Elshoff WB8CJW <dale.elshoff@...>

Try turning off AGC.  That always raises my noise level up by about 10 dBm.  On AM broadcast (550 - 1500 kHz) I have to set manual gain below 3.7 dB to prevent overloading causing audio distortion and that may be mostly a characteristic of my RTL SDR dongle.  With the Visual Gain control you can make the S-meter and waterfall look like whatever you want.

Dale, WB8CJW

On 8/28/2019 5:27 PM, Graham Dillabough wrote:
Good afternoon,

This has probably been covered somewhere, but I can't find it.

I am using SDR Console, with an Airspy (early model)  and Spyverter.

I was comparing signal levels with my KX3 today.  When I removed the antenna on the KX3 (or switched the dummy load in), the S-Meter would go to zero.  When I put the Airspy and Spyverter (or just the Airspy alone) into the same antenna circuit, the baseline would be S3 to S4, no lower, even when the gain controls are zeroed out.

Why is this?  Is there an adjustment for minimum S meter that I have overlooked, or is the nature of the system to show a high background noise level.  I would like to experiment with the gains to make the readings approximately the same between the two systems.

Thanks and 73


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