50
Front Panel Temperature Sensor
Turn the K3 OFF. Allow about 15 minutes for
the radio to cool to room temperature.
Turn the K3 ON.
Locate the CONFIG:FP TEMP menu entry.
Adjust the parameter to match the readingof a
room thermometer. Note: Deg. C = (deg.
Fahrenheit - 32) * 0.555.
Front panel compartment temperature can be
monitored continuously. Tap DI SP ,then use VFO
B to select the FP xxC alternate display.
PA Temperature Sensor
Turn the K3 OFF. Allow about 15 minutes for
the PA heatsinkto coolto room temperature.
Do not turn the K3 ON during this period.
Turn the K3 ON.
Locate the CONFIG:PA TEMP menu entry.
Adjust the parameter to match the readingof a
room thermometer. Note: Deg. C = (deg.
Fahrenheit - 32) * 0.555.
PA heat sink temperature can be monitored
continuously. Tap DI SP , then use VFO B to select
the PA xxC alternate display.
S-Meter
S-meter calibration is normally adequate usingthe
default settings for both the main and sub receivers.
Calibratingthe S-meter requires a 50-ohm, 50-
microvolt signal (an accurate signal generator such
as an Elecraft XG1 or XG2 is recommended).
If you’re calibrating the sub receiver’s S-meter:
(1) tap SU B to turnthe sub receiver on; (2)
hold B SET to gain accessto sub receiver
controls; (3) tap ANT until you see MAIN
flashed on VFO B; this sets up the sub receiver
to sharethe main RF path (pg. 37).
Switch to a band applicable to your signal
generator and select CW mode.
Set transmit power to 0.0 W using PWR .
Turn preamp on (PRE ), attenuator off (ATT).
Tap AGC to select slow AGC (AGC-S).
Bypass the ATU, if installed, by holding ATU .
Set RF GAIN to maximum (fully
clockwise). (Note: If you’ve assigned the RF
gain control for the present receiver to squelch,
its RF gain will default to maximum unless
you’re controlling RF gain from a remote-
control computer application.)
Normalize the DSP filtering (hold NORM; pg.
14).
Connect the signal generator to ANT1 and set it
for 50 microvolts RF output.
Tuneto the frequency of the signal generator
(tune for peak audio response). You can also
use auto-spot (pg. 30) to accurately match the
pitch of the signal, ensuringthat it is centered in
the passband.
The S-meter has both relative and absolute
modes. Referto the CONFIG:SMTR MD
menu entry description if you wish to switch
from relative to absolute. (Relative mode is
easier to calibrate and isthe factory default.)
Locate the CONFIG:SMTR PK menu entry;
set it to OFF.
Locate the SMTR SC menu entry (S-meter
scale). Use the VFO A knobto set it to the
default value (14).
Adjust SMTR OF (S-meter offset) for an S-9
reading.
Switch the signal generator to 1-µV output; the
S-meter should now indicate about S-2 to S-3.
If not, change SMTR SC by 1 unit (try 15 first,
then 13, then 16,then 12). After each SMTR
SC change, re-adjust the SMTR OF setting for
an S-9 indication.
When you have completedthis procedure,
disconnectingthe signal generator should now
show NO bars onthe S-meter.
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