Vertex Standard VX-2500EV, Service Manual

Page: 14 / 44

14
Max Deviation
This parameter is used to align Max Deviation.
Set the transceiver to CH#1 or CH#2 via the "CH"
box located upper left corner on the "Alignment"
window previously.
Adjust the AF generator output level to
39mVrms(-26dBm) at 2 kHz to the pin3 of the
J1502 (D-sub 9pin).
To adjustment double-click the left mouse but-
ton on the
" "
box to open pop-up
window.
Move the Slide bar, as need, as need, to set the
modulation wave as follows.
Alignment
OK NG NG
Modulation balance
This parameter is used to align Modulation balance.
Set the transceiver to CH#1 or CH#2 via the "CH"
box located upper left corner on the "Alignment"
window previously.
Adjust the AF generator output level to
774mVrms(0dBm) at 300Hz to the pin3 of the
J1502 (D-sub 9pin).
To adjustment double-click the left mouse but-
ton on the
" "
box to open
pop-up window.
When the desired the modulation wave is at-
tained, press "OK" to lock in the new data.
Press [Enter] to lock in the new data.
Move the Slide bar, as need, to set the Deviation
(Wide or, Narrow) to the following specification,
as indicated on the deviation meter.
VCO Deviation(Wide): 3.0[kHz](±0.1[kHz]) or,
VCO Deviation(Narrow): 1.5[kHz](±0.1[kHz])
When the desired deviation level is attained,
press "OK" to lock in the new data.