Elecraft K2 Owner's Manual - Manual (Page 104)

E
LECRAFT ® 103
Advanced Operating Features
A number of specialized operating techniques are described in this
section:
 Scanning and channel hopping (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 107).
Scanning and Channel Hopping
The K2's scanning features let the K2 tune any band segment
continuously, or channel-hop among two or more memories, with or
without the receiver squelched. Scanning when squelched allows the
K2 to ignore stable carriers (key-down signals with no modulation),
stopping only when "interesting" signals are found. Scanning with the
receiver "live" (unsquelched) is especially useful when listening for
weak signals on very quiet bands.
60-Meter Channels: Channel-hopping (manually or using scan) is
intended primarily for use on 60 meters. The present U.S. 60-meter
channel designations are 5330.5, 5346.5, 5366.5, 5371.5, and 5403.5
kHz (USB only). Typically these would be programmed into
memories 1-5. See channel hopping details at right.
Scan Resume: Scan-mode users may wish to use the menu to program
P F 2
(or
P F 1
) as SCAN RESUME. Holding that switch will then re-
start scan without having to use the
R C L
/
S T O R E
method.
To use continuous scanning (from VFO A to VFO B):
 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.
 Select the operating mode, preamp/attenuator setting, and tuning
rate (
R AT 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
) until you see SCAN on the display. You
can also initiate scanning when you recall a stored memory. Just
hold
R C L
, then hold the numbered switch, as with
S T O R E
. The
memories can store up to 10 scan ranges for instant recall.
 To scan with the receiver live (unsquelched), continue to hold the
numbered button until you see AF ON. If the tuning rate is set
for 10 Hz steps, live scanning proceeds at 50 kHz/minute.
 During squelched scanning, when a station is found, the receiver
will un-squelch and will stay on that frequency for about 25
seconds or until the signal fades.
 You can stop scanning by tapping any switch, key, or PTT.
 Use SCAN RESUME (
P F 1
or
P F 2
, see at left) to restart scan. To
resume "live" scanning, hold until you see AF ON.
To use channel hopping (manually or with scanning):
 Set up and
S T O R E
two or more memories for the target band
(using VFO A only). Then choose one memory as the "initializer"
to be used when starting channel scan, and
R C L
it.
 Edit the RATES secondary menu parameter (page 107); tap
D I S P L AY
to select CH SC (channel scan) or CH SC-TN
(channel scan plus manual hopping); exit the menu;
S T O R E
this
memory. If manual hopping is enabled, you can now use the VFO
to hop among memories assigned to this band.
 Scanning can be initiated via
R C L
or
S T O R E
. The scan rate is 0.2
seconds per channel (0.5 seconds per channel for "live" scanning).
Note: VFO B can be set up differently on a per-channel basis for
split operation, if desired, or you can fine-tune channels when
necessary by turning on both
R I T
and
X I T
.