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VFO ENC RATE
Available settings: FAST, SLOW.
Unlike tuning STEP as set via the STEP
button, the VFO ENC RATE control is used
to determine how many steps per revolution
the main tuning knob makes.
The FAST rate is slightly less than 2x the
SLOW rate.
Set to SLOW and 10 Hz steps (the most
commonly selected step size), one knob
revolution tunes approximately 1.2 kHz.
Set to FAST and 10 Hz steps, one knob
revolution tunes approximately 2 kHz.
RIT ENC RATE
RIT and XIT tuning steps are fixed at 10 Hz.
The RIT ENC RATE control is used to
determine how many steps per revolution
the RIT/XIT tuning knob makes.
The FAST rate is 4x the SLOW rate.
Set to SLOW, one knob revolution tunes
RIT/XIT approximately 90 Hz.
Set to FAST, one knob revolution tunes
RIT/XIT approximately 360 Hz.
VFO SPDSHIFT
Available settings: ON, OFF.
The main tuning knob on the OMNI-VII is
equipped with a feature called VFO SPEED
SHIFT. When set to ON, turning the VFO
knob very fast will result in larger movement
up or down the band than would have been
possible with the step size and VFO ENC
RATE set at given values.
Example: With step size set at 10 Hz and
VFO ENC RATE to SLOW, one complete
knob revolution at a normal tuning speed for
listening to the band will cover
approximately 1.2 kHz. If VFO SPEED
SHIFT is ON, turning the knob very fast will
tune approximately 4 kHz per revolution.
This is to allow the operator to quickly move
from one part of a band to another without
changing step size or VFO rate.
DISPLAY
Available settings: 0 to 100%
DISPLAY controls the intensity of the
backlighting on the display screen. Lower
588 manual
Part #74409
Printed in USA
values are darker lighting, higher values are
brighter lighting. At 0%, the screen lettering
is almost unreadable on a dark background.
At 100%, the screen is "washed out" in light.
The default value is 50%.
SPEECH PROC
Available settings: 0 to 100%
SPEECH PROC duplicates the front panel-
accessible SP function in the menus. See
(29) SP/VOX in Section 2.
I-F FILTER
Available settings: 20 kHz, 6 kHz, 2.5 kHz,
500 Hz, 300 Hz, AUTO.
OMNI-VII is equipped with a 20 kHz wide
filter at the 70 MHz 1
filters at the 455 kHz I-F. Bandwidths of 20,
6, and 2.5 kHz at the 455 kHz I-F are
standard equipment; Collins™ mechanical
filters at 500 Hz (model 2031) and 300 Hz
(model 2032) filters are optional. The stock
2.5 kHz filter is also a Collins™ mechanical
filter.
See I-F FILTER AND DSP BANDWIDTH
FILTER THEORY AND USE in Section 5 for
a complete explanation of the use of these
filters in conjunction with the DSP bandwidth
filtering.
Each I-F FILTER can be selected
independently or AUTO can be employed to
automatically select a filter when that filters
bandwidth threshold is crossed.
Example: Set I-F FILTER to AUTO and exit
the menu. Turn the BW knob to adjust BW
to 2000 Hz. The filter selected will be shown
as IF 2.5 kHz on the screen. Turn BW knob
clockwise to increase value. As you pass
2500 Hz to the next DSP BW filter, the
OMNI-VII automatically selects the next
highest available I-F filter value (in this case,
6 kHz). Turn the BW knob
counterclockwise to decrease the DSP BW
value and the filters available will
automatically decrease as the threshold of
each is passed.
When set to AUTO, the I-F filter bandwidth
value shown on the screen is in green
lettering. When an individual I-F filter is
manually selected, the bandwidth value is
shown in white.
Second release – August 2007
st
I-F, and up to five
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