Editing Common Data; Environment Data; L.o. Injector; Serial Number - Vertex VXR-5000 User Manual

Editing Common Data
Environment Data
Environment Data (most of which cannot
be changed without changing the hardware),
can be viewed by entering the first Main
Menu item. These parameters are stored in
EEPROM along with the changeable parame-
ters, but they must match the circuitry of the
repeater being programmed.
Remember to be careful whenever editing
this data as entering an incorrect IF frequency or
Injection Offset
will
render the repeate.r non-op-
erational. To change any of the enVlIonment
parameters, you must restart the program
with the -P switch ("CES -P").
• 1st IF - should be set to 21.6 MHz for VHF
versions, 47.9 MHz for UHF. Do not alter
this setting unless making hard ware
changes.
VXR-5000
• L.O. Injection- selectable upper/lower
offset determines the local oscillator injec-
tion. Can be changed to improve inter-
modulation performance in urban areas
or high RF environments. Do not alter this
setting, as receiver re-alignment is neces-
sary.
• Channel Steps- determine the minimum
channel step size. Select 5 kHz, 6.25 kHz,
10 kHz, or 12.5 kHz, according to your
spacing requirements.
• Serial Number - up to 12 digits can be
entered here to identify the repeater being
programmed. We recommend entering
the VXR-5000 identification code found
on the side panel of the repeater cabinet
for easy future reference .
Repeater Environment Window (using " -P" switct:)
Instruction Manua l
3 -5