RF Gain Calibration measures the effect of the hardware AGC voltage on the K3's receive gain, in dB.
It uses a narrow filter setting to improve the S/N of the signal measured by the DSP as the gain decreases and the signal being measured is reduced in amplitude due to that decrease. The hardware AGC voltage is applied after the 8.215 MHz roofing filters, so the accuracy of the filter gain compensation is of no practical consequence as long as the roofing filter selection is not changed during the calibration process. Becasue the hardware AGC calibration may affect the reported S Meter values, S Meter calbration should be checked and adjusted if required, after RF Gain Calibration is completed. 73, Lyle KK7P > I wish somebody would explain excatly what the RF gain calibration does > and how it works. This is typically done after the crystal filter gains > are set. The procedure asks one to set the filter width to 100 Hz. > That of course would kick in the 200 Hz filter here. But some have said > this procedure sets the gain of the stage before the filters. So why > specify a filter width setting? What is monitored during the RF gain > adjustment process? ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
