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used. The step frequency is kept and used again the next time the CH+/- keys are used. The step
is permanently kept when the radio is powered off and back on with the remote Power button.
The CH+/- keys will change the frequency when in the VFO mode, and change memories up and
down when in memory mode.
Frequency pacing is the rate at which the frequency is increased or decreased when the CH+/-
keys are held down. The pacing is a configurable parameter that can be set by the user. You can
speed up or slow down the rate at which the frequency changes by setting the frequency pacing.
The CH+/- keys are used to step the frequency up and down when in VFO mode. The first press
of the CH+/- in this mode will be slightly delayed. If the key is held down it will then begin
stepping the frequency at the current slewing rate. Use single presses of the CH+/- keys to move
slowly up or down in frequency. Hold the keys down continuously to step the frequency very
quickly.
The FRG-8800 and the HF-225 interfaces are unidirectional. Because of this the remote has no
way of knowing the current frequency setting on the display. When the SWL IR Remote control
unit is first powered, it sets the frequency to 10MHz. You can then move around from there and
the remote tracks the frequency. The current frequency is kept as long as the remote control unit
is powered. If the power is removed, the frequency goes back to 10MHz.
Last Frequency Recall
The last directly entered frequency can be recalled. Use this when looking for other frequencies
being used by a shortwave broadcaster. You can set a frequency directly, enter another
frequency, and return to the original frequency. You can then enter another frequency and return,
etc. The last frequency entered is lost if power is removed from the remote control unit. It is kept
if the radio is powered off.
Tuning Steps
Pre-set Tuning Steps can be selected by entering a single digit before using the CH+/- keys on the
remote. The tuning step stays until changed again by the user. The Kenwood R-5000 has built in
tuning steps that are overridden by the radio when using the remote. You can tune all modes
except FM to 100Hz. Only SSB and CW modes can be tuned to 10Hz. FM steps are 5kHz and
2.5kHz.
Five User Tuning Steps can be defined for special tuning requirements. Set these tuning steps to
half the value of your filters. Tuning off frequency by half the filter bandwidth will improve
audio response without degrading the signal or losing synch lock. For example if you have a
2.4kHz filter, set User Tuning Step 1 to 1.2kHz and then tune off frequency when the 2.4kHz
filter is selected. This procedure is similar to using a PBT control, but you can see on the display
how much off frequency you are tuned. With the PBT, you can only adjust and listen for
improved response. You could also set a User Tuning Step to 5Hz and use it to quickly zero-beat
the frequency in SSB mode on the R75. A similar method will work for other receivers that don't
have 1Hz resolution.
Even though you can set User Tuning steps on the Lowe HF-225, they really don't make much
sense. The keyboard interface on the HF-225 only accepts frequency values to 1kHz.
Frequencies sent from the SWL IR Remote are truncated below 1kHz, so anything below 1kHz
will be taken as zero. A step of 100Hz will do nothing to tune the HF-225 until the 1kHz digit is
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