In a message dated 18/03/05 07:33:11 GMT Standard Time, [EMAIL PROTECTED] writes:
For detailed information (in numbers) i still need some peace of equipment (step att).I was going from transverter output (abt 1mW sig) directly to a HF RX.Of course, i was increasing noise all over the band but that was not the problem.When i TX in SSB without modulation there are thousends of little birdies (none on CW) all over the entire band, way down from the level of carrier, but there. --------------------------------------- It is not considered good practice to feed effectively what is a low power transmitter directly into a receiver input as it can cause all kinds of distress to the receiver. 1mW or 0dBm is about 225mV PD across 50 ohms. The normal S9 level of 50uV PD is -73dBm. This means that 73dB over S9 is hitting the receiver front end. It will almost certainly show definite signs of distress! Try the test again with a suitable attenuator in line to bring the level down S9 or slightly above. i.e. -70 to -80dB of attenuation. Bob, G3VVT _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
