Changing The Channel Steps - Vertex Standard VXA-300 PILOT III Operating Manual

Changing the Channel Steps

The VXA-300's synthesizer provides the option of utiliz-
ing channel steps of 8.33/25 kHz per step.
The VXA-300 is set up with default channel steps of "25
kHz" (NAV and COM bands). If you need to change the
channel step increments, the procedure to do so is very
easy.
First set the VXA-300 to the operating band (VFO A
or VFO B and NAV or COM) on which you wish to
change the channel steps.
Press the [ F ] key, then press the VOLUME knob to
activate the Menu ("SET") mode.
Rotate the DIAL selector knob
to select Menu Item 30
"STEP."
Press the VOLUME knob to
enable adjustment of this Menu item.
Rotate the DIAL selector knob to select the new chan-
nel step size.
When you have made your selection, press the VOL-
UME knob to save the new setting, and then press the
PTT key to exit to normal operation.
VXA-300 P O
ILOT
A
DVANCED
M
PERATING ANUAL
O
PERATION
Important Note
1) When you set the channel step to 8.33 kHz, the channel
display differs from actual operating frequency; see the
chart below. However, the operator (pilot, tower, con-
trol, etc) will call out the frequency according to what
the display indicates.
When you set the channel
steps to 8.33 kHz, the "
icon will appear in the display.
Operating
Frequency
1 .0000 MHz
1 .0083 MHz
1 .0166 MHz
1 .0250 MHz
1 .0333 MHz
1 .0416 MHz
1 .0500 MHz
1 .0583 MHz
1 .0666 MHz
1 .0750 MHz
1 .0833 MHz
1 .0916 MHz
2) The 8.33 kHz step allows the radio to receive only, and
the transmit function is disabled.
3) The adjacent channel selectivity will be slightly de-
graded while receiving using 8.33 kHz channel steps.
"
Display
8.33 kHz Step 25 kHz Step
1 .005 MHz 1 .000 MHz
1 .010 MHz
1 .015 MHz
1 .030 MHz 1 .025 MHz
1 .035 MHz
1 .040 MHz
1 .055 MHz 1 .050 MHz
1 .060 MHz
1 .065 MHz
1 .080 MHz 1 .075 MHz
1 .085 MHz
1 .090 MHz
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