Elecraft K3 Owner's Manual - Manual (Page 55)

55
CW WGHT 1.15 Adjusts element/space timing ratio (weight) for the internal keyer.
Additional functions of this menu entry, via numeric keypad (Advanced):
Tap
1 to select SSB -CW (default) or SSB +CW (allows CW in SSB modes).
Tap 2 to select @ = STOP (‘@’ character terminates KY-packet transmission;
default) or @ = ‘AC’ (‘@’ in a KY packet is sent as .--.-. [@] in CW mode).
Tap 3 to select OLD or NEW QSK (default). NEW reduces AF keying artifacts.
Tap 4 to select VOX NOR (default) or AUT O OFF . The AUT O OFF setting
turns CW VOX off on power-up, avoiding accidental keying by attached PCs, etc.
Tap
5 to select automatic VFO offset on SSB/CW mode change ( VFO OFS ) or
no offset ( VFO NOR , default). Automatic offset is often used on 6 meters, where
mixed-mode QSOs are necessary during fading. Note: Pitch matching will be
more accurate if USB is paired with CW REV, and LSB with CW normal.
DATE N/A Real-time-clock date, shown as in the format selected by CONFIG:DATE MD
(MM.DD.YY or DD.MM.YY). Tap
1 / 2 / 3 to select month / day / year.
DATE MD US Select US (MM.DD.YY) or EU (DD.MM.YY) date formats.
DDS FRQ [T] {DDS
freq}
(Troubleshooting.) Controls DDS tuning directly to check DDS XFIL range for
synthesizer troubleshooting purposes. Rotate VFO A CCW and CW to find limits
where
L (lock) changes to U (unlock). Correct DDS frequency is restored after
exiting the menu and rotating either VFO.
DIGOUT1 OFF DIGOUT1 is a general-purpose open-drain output signal on the ACC connector
(pin 11).
OFF = floating; ON = pull the line to ground.
DIGOUT1 is per-band, and also per-antenna if the KAT3 ATU is installed. It can
be used to turn an Elecraft PR6 preamp on when you switch to 6 meters, control a
remote antenna switch, etc.
Max. load current (
ON ) is 15 mA; max. load voltage ( OFF ) is 25 VDC.
DUAL PB APF Assigns one of two specialized filter functions to the D U A L P B switch in CW
mode: APF (audio peaking filter) or NOR (Dual-Passband Filtering, or Dual
PB). See pg. 35 for details on the two functions.
EXT ALC [T] OFF t-4.0 (Advanced) Set to ON only if using external ALC with a high-power amplifier.
This may require modifications to your K3’s RF and KIO3 modules (see pg. 27
for details). When set
ON , the K3’s external ALC threshold ( -4. 0 V by default)
can be varied.
FLx BW
SUB
2.70 (FL1) Crystal filter FL1 - 5 bandwidth in kHz, where x= 1 to 5 (FL1-FL5). Tap 1 - 5 to
select a specific filter, or tap X F IL ( 6 ) to select the next filter. Then set the
bandwidth to that marked on the crystal filter. (If desired, the value entered can be
slightly different from the marked value. For example, you might set the
bandwidth of the 8-pole, 400-Hz filter to
0.4 5 kHz rather than 0.4 0 kHz. This
delays automatic filter switching by the WIDTH control to 0.45, which may be
advantageous if you believe the 400-Hz filter still performs well at 450 Hz.)
Note: An easier-to-use alternative to the FLx menu entries is the Edit Crystal
Filters function of our PC software application, K3 Utility. It shows all filter
setups in a single window.
Tap 7 to turn IIR DSP filters on ( IIR ON ) or off ( IIR OFF , default) for the 100
and 50 Hz bandwidths. IIR filters have steeper skirts and slightly more ringing
than the default FIR filters.