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In article , "phil "
wrote: hi Telamon: A more complex reason for the RX340 non-lock is that the radio has a front-end analog RF AGC followed by a DSP AGC. The locking problem could be related to the way the two loops interact in various reception situations. the RX340's 16-bit ADC is not ideal as this limits AGC inside the DSP. the "software" AGC must keep altering [via DAC] the analog gain during fades. new ham gear uses 24-bit ADCs. Yes. And then the lost lock arises due to how they interact. The dual loop response probably isn't fast enough to correct for rapid and deep fading. -- Telamon Ventura, California |
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