DJ-C7 & DJ-S45 Transceivers

[wql]

Hi,

I just bought the DJ-C7 & DJ-S45 transceivers for a CubeSat project. For my project, the DJ-C7 is to receive data signals transmitted from the DJ-S45. So I just wanna ask how to connect the DJ-C7 to a oscilloscope cause there is two connection for the speaker? And the other question is how to connect the DJ-S45 to the function generator cause for the microphone input there is an outer circular connection and a inner circular connection, I am not sure which is meant for the signal and which is for the ground? Thanks alot.

Regards,
Justin

[5B4AJB]

Only one of those two sockets is for output (speaker), the other is an input (microphone).
You can connect the speaker to a 'scope/decoder, but getting the right level/volume setting is tricky.

I would suggest this http://www.qsl.net/5b4ajb/lineout.zip, but it probably won't be any use on a handheld.

Look in the manual, or experiment to find the connections, I think the tip is used to provide a Voltage for condenser type microphone inserts.