ELECRAFT 99
Resetting the Configuration to Factory Defaults
You should reset configuration data to defaults only if the K2’s
EEPROM is accidentally corrupted. (This is extremely unlikely to
happen.) The most likely symptom that this has occurred would be
an unexpected frequency setting showing up on a particular band, or
strange characters appearing on the LCD. Before resetting the
configuration to defaults, try simply re-entering the correct
frequency and storing it in the affected memory.
If you find it necessary to defaults, record the following data first:
• filter and BFO settings for all modes/filters (using CAL FIL)
• other CAL parameters, e.g. S-meter HI/LO, current limiting
• primary menu parameters
• secondary menu parameters, if applicable
To reset to defaults: Turn the K2 off, then hold down the
4 , 5 ,
and
6 switches, and turn power back on. The EEPROM will be
rewritten with factory defaults. You can then re-enter the data
saved above using the menu functions. Re-doing CAL PLL is also
recommended.
Computer Control of the K2
If you have the RS232 interface adapter installed (model KIO2), or
the 100-watt stage (KPA100), you’ll be able to use a computer to
control the K2. Both the KIO2 and KPA100 provide true RS232
levels (at 4800 baud), with no need for a level converter.
The K2's computer-control capabilities are compatible with nearly
all contesting, logging, and remote-control software, including
Elecraft's k2remote and k2voice programs. Control over the
internet is also possible. You can write your own programs as well
(see the KIO2 Programmer's Reference, on our web site).
Refer to the KIO2 or KPA100 manuals for additional details.
Fine RIT Mode
The K2's FINE RIT feature provides receiver tuning in steps
smaller than 10 Hz. The primary use of FINE RIT is for data
modes such as PSK31, which can benefit from a reduction in T/R
frequency shift between FL1 and one other filter
18
. FINE RIT mode
is only effective for this if FL1 is configured as O P 1 (SSB crystal
filter). FINE RIT can also be used to accurately zero-beat AM
stations, or to fine-tune CW signals when a narrow filter is used.
Limitations: Entering FINE RIT mode turns off SPLIT, RIT, and
XIT, which cannot be used in combination with FINE RIT. If you
move the VFO while using FINE RIT, you may need to readjust the
OFFSET control due to small differences in linearity over the
VFO's tuning range.
To use FINE RIT: Select a narrow data-mode filter (F L 2 - F L 4 )
using
X F I L . Next, hold R I T and X F I L together; the display will
show F I N E O N , and the RIT and XIT annunciators will alternate
on/off slowly. Only F L 1 and the selected narrow filter will now be
available; the other two will be temporarily disabled. You can then
use the OFFSET knob to fine-adjust the signal pitch of the narrow
filter without affecting the pitch of FL1. Turning the OFFSET
knob will display the filter selection and the FINE RIT offset, from
-15 to +15 units (e.g., F L 3 - 1 2 ). One unit is about 1 to 3 Hz
(finer on lower bands). When you transmit (always through O P 1 ),
you will be closer to the received station's carrier frequency, and on
receive, switching filters will result in few if any lost characters.
To cancel FINE RIT: Hold
R I T + X F I L , or change modes or bands.
F I N E O F F will be displayed.
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In data modes, the TX and RX frequency will always be exactly the same
if you use only FL1 (if set to O P 1 ), and avoid using splits. However, you
may wish to switch to a narrow filter when QRM is present. The shift in
frequency between O P 1 (which is used on transmit) and the narrow filter can
cause the signal to "walk" up or down the band if "net" is turned on in the
demodulation software. Most software provides a means of turning off "net"
(i.e. locking the TX frequency). FINE RIT provides a supplemental tool.
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