High Performance Direct Conversion Receivers
noise stereo preamplifier. The requirements for an audio amplifier for SSB are not too severe, since the speech signal occupies the entire bandwidth, and the in-band intermod products present in the transmitted signal are seldom more than 30 dB down. CW is an entirely different story. A pileup on the low end of the
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www.arrl.org50 July 2002 also be protected. The method of protection will change, how-ever, since the interface is electronic. Once the peak operating interface voltages are determined, it is relatively straightfor-
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xiegu.eutuning control to select from PRE/ATT, SPLT (Split operation), NB (noise blanker), COMP (speech compressor), or AGC 3. Hand Mic F2.. this allows assigning a function to the hand held mic’s ‘F2’ button. Rotate the button. 4. LCD BL.. rotate the tuning control to specify the desired brightness of the display from 10% to 100%. 5.
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