Test Tx 1W or 5W on PowerSDR ??

[Stanley Seow]

How do test Tx 1W or 5W from PowerSDR ?

I hook up a power meter . hear the TR relay click but no power readings on the power meter...

I just follow the instruction step by step here 

https://www.youtube.com/watch?v=97UZi8qYAKM

Thanks

Stanley

[Steve Haynal]

Hi Stanley,

Do you have the PA enabled? Do you see any output from either RF connector? Do you have signal applied, not just TX with no signal? Usually tune on PowerSDR will create the signal.

I suggest starting with software that is more aware about the HL2, like Quisk or SparkSDR. There is a list of software here:

https://github.com/softerhardware/Hermes-Lite2/wiki/Software

Also, if you prefer PowerSDR, please use Reid's customized version:

https://groups.google.com/g/hermes-lite/c/dGGOPgxM0is

73,

Steve

kf7o

[Joe LB1HI]

Hi Stanley,
Yes PA shuts down after restarting the program.
A small procedure helps effectively.
If this box is checked, uncheck it and check it again.

GL es 73, Joe

[Stanley Seow]

>I suggest starting with software that is more aware about the HL2, like Quisk or SparkSDR. There is a list of software here:

Thanks, will try with the mentioned software ...

I don't have a RF power meter but a Rigol Osciloscope ...

Can I directly output the 5W directly into the scope and measure the peak to peak voltage and convert to Watt ??

[Bob Edwards]

Always operate the transmitter into a 50 ohm dummy load. Measure the voltage across the dummy load with a 10:1 scope probe. 5W will develop 44.7V peak to peak.  Make sure the probe has been compensated first.

[Bob Edwards]

Feeding the signal directly to the scope - check the scope input rating is up to it first. Never use any 50 ohm input impedance setting, keep the input set high impedance (Some scopes have this ability) You will overload any 50 ohm termination in the scope, if there is one - they're only good up to about 1W usually. Using a 10:1 probe protects the scope.