Eddy,
The K2 dial calibration does *not* depend on the 4 MHz reference
oscillator, except at the time CAL PLL and CAL FIL is done. The data
from CAL PLL and CAL FIL is stored in EEPROM and will not change unless
those routines are done again.
In other words, once CAL PLL and CAL FIL are
The RTTY or Digital filters are available on the newer versions of
firmware and allow a complete set of filters tuned and setup specifically
for RTTY or digital modes, however they must be enabled. The manual
explains this Or if you have an older K2 with an upgraded MCU then you need
to look at
Subject: RE: [Elecraft] K2 drifting?
The RTTY or Digital filters are available on the newer versions of
firmware and allow a complete set of filters tuned and setup specifically
for RTTY or digital modes, however they must be enabled. The manual
explains this Or if you have an older K2
K2 Temperature Compensated PLL Reference Upgrade - Only needed for K2 SN
less than 3446 - you do not need it.
It has been my experience that the offset remains the same - this is related
to your calibration for the XFIL's.
Do not have the DSP filter - perhaps Lyle can answer that question.
Rich
if I have a very strong station nearby while I'm using
OP1 on Tx Rx and a very narrow DSP filter I may not
get the best function out of the filtering.
The AGC would see the wider bandwidth while the computer running PSK31
or whatever mode you are using would see the narrow bandwidth, so
I observed the same problem when I use any of the filters (XFIL) other than
the main one OP1. The narrower filters can be slightly off frequency but
you always transmit with OP1. Thus you will be slightly off frequency when
you transmit at what you hear for the other parties frequency. His PSK
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