96 ELECRAFT
Advanced Operating Features
A number of specialized operating techniques are described in this
section:
Scanning (see below)
Reducing current drain for portable operation
Using a separate receive antenna
Programming the PF1/PF2 functions
AGC on/off control
VFO frequency calibration techniques
Checking firmware revision numbers
Resetting to factory defaults
Using computer control of the K2
FINE RIT mode
Also see Secondary Menu Functions (page 100).
Scanning
The K2's scanning feature lets the K2 tune any band segment
continuously, keeping the receiver audio squelched until signals of
interest are found. Scanning works for both CW and SSB signals,
and when properly set up will ignore most stable carriers (key-down
signals with no modulation).
Scanning is very useful for monitoring bands that may at first
appear "dead." You may be surprised to find more activity than
expected. The receiver will stay squelched until a signal appears.
Frequent scan users may wish to program
P F 2 (or P F 1 ) to do SCAN
RESUME as described at right.
To use scanning:
Setup VFOs A and B for the two ends of the band of interest.
VFO A must be set for a frequency lower than VFO B (a
minimum of 2 kHz separation is recommended).
Select the operating mode, preamp/attenuator setting, and
tuning rate (
R A T E ). Select a narrow filter if the band is noisy.
Store this setting in any memory (using the
S T O R E switch), but
instead of tapping the switch for the desired memory, hold the
numbered switch (
0 -9 ) to initiate scanning. You can also
initiate scanning when you recall a stored memory. Just hold
R C L , then hold the numbered switch in, as with S T O R E . The
memories can store up to 10 scan ranges for instant recall.
During scanning, the MHz decimal point flashes. When a
station is found, the receiver will stay on that frequency for
about 25 seconds or until the signal fades. Once a signal has
disappeared or 25 seconds have elapsed, the frequency will be
incremented by 0.5 kHz and scan resumed.
If scanning seems to be locking onto noise too often, you can
tailor the lock rate by backing down the RF GAIN control. Also
try using a narrower filter or turning off the preamp. You'll
need to re-store the scan memory after making these changes.
You can exit scan mode by tapping any switch or hitting your
key or paddle. Use SCAN RESUME (below) to restart scan.
Scan Resume: Often you may wish to stop scanning, then pick up
where you left off. To do this, you can program
P F 2 (or P F 1 ) to do
scan resume. Once scan resume has been assigned to a
programmable function switch, simply tap any switch or the keyer
paddle to stop scan, and hold
P F 2 (or P F 1 ) to re-start it. You’ll
hear one BEEP when you stop scan, and another beep when you
resume it. The frequency will jump up 0.5 kHz to avoid having scan
re-lock on the same station.
To Next Page
Loading...
