[Elecraft] [K3] Re: K3 DVR question

Lyle Johnson kk7p at wavecable.com
Sat Aug 13 13:37:26 EDT 2011


Hello Werner!

On Tx, the DVR is injected into the Tx audio path *after* the MIC (or 
line) gain but before the Tx EQ.

Thus, Mic Gain will have no effect on the level of DVR playback, whether 
recorded in a DVR memory or recorded off the air.  TxEQ and CMP settings 
will effect the DVR's Tx signal, however.

The purpose of this is to allow a DVR playback to most closely emulate 
your normal, mic- or line-based Tx signal.

On Rx, the DVR records off-the-air signals just before the AF Gain 
control is applied.  This is to allow you to play back signals to your 
local speaker and adjust the level, just as you would when receiving the 
signal.  You may with to turn up the gain (to try and hear a weak 
signal's callsign, for example) or turn it down (to not disturb others 
nearby, for example).

Your AGC settings will definitely affect the record level (threshold and 
slope).

Unfortunately, if you are playing back a signal that you have recorded 
off-the-air, you have no control over the DVR-to-Tx-audio level.

I will look into a way to allow you to adjust this for a future DSP code 
release.

Thank you for bringing this to our attention.

73,

Lyle KK7P


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