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Observing a low frequency signal using an up converter

 

Hi all,?
A while back I bought the BG7TBL ,SA Low Frequency Converter to look at? low frequency signals with my? old spectrum analyzer that had a lowest input frequency of 1Mhz. It sat idle in a box for the last couple of years.
Today I resurrected it to play with the TinySA ultra.
Turning on the cal output and setting it to 10Mhz I connected the converter through a 20db amplifier to the 10Mhz sync input of the converter. The RF output? of the converter is connected to the RF input of the TinySA through a 3db attenuator to have a -11dbm signal read ~-11dbm on the TinySA. The value isn't accurate but the closest what I have.


The low frequency can be observed from 10Mhz on. Here is a 200Khz signal displayed on the TinySA App.


And here is a 50khz signal. Both are at ~ -11dbm from my HP signal generator. The settings on the TinySA could be tweaked but I wanted to keep it at default for those tests.

John
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