I set up the K3 Rx sensitivity test (using 1 microvolt signal) according to XG2 manual.
It seems to work in general except that the resulting MDS calculations seem too low: 123 dBm on 80 meters, 132 dBm on 40 meters, and 130 dBm on 20 meters. I am using the front headphone jack on the K3, with the CONFIG:SPKR = 1. AGC is off. Preamp is own, RF & AF gains are at maximum, and the CW passband is set to 500 Hz. The AC measurements were made using a Craftsman autoranging multimeter. Example: on 40 meters the reading was 0.310 V with XG2 on and 0.018 V with XG2 off. (0.310/0.018) = 17.2. Log 17.2 x 20 = -24.7 dBm. MDS = -107 dBm -24.7 dBm = 131.7 dBm. I was expecting a better value (maybe -137 dBm?) Could it be a problem with the DMM? If so, is there a recommended DMM? Thanks in advance for your help. 73, Fred AE6IC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
