User's Manual

68P81093C75-A 7-7
to a received signal. To deactivate the Access Disable
function, press shift+F6.
2. RSSI Calibrate :
1. In the Alignment Menu Screen, tab over to the RSSI
Calibrate field, and press F2 to perform the alignment.
2. Using an R2670 or equivalent Communications System
Analyzer, connect the RF out from the Analyzer to the Rx
UHF-type connector on the station top panel.
3. Set the RF output level from the Analyzer to –90 dBm with
no modulation, and set the frequency to PDR 3500 receive
frequency.
4. With the Analyzer RF turned on, make sure the value shown
in the RSS screen is –90 dBm. If it is not, type in “–90
dBm.”
5. Press F8 to save the calibration.
3. Power Out:
The output power of the PDR 3500 is aligned to a predetermined
reference level near the upper limit of the station. This level is
the same irrespective of the desired output power of the station,
and is specified for each frequency band based on Table 7.
The power output alignment process is basically a feedback
loop: The station attempts to transmit at the alignment power
level from Table 7. The user checks the power on a wattmeter
and tells the station what power it is actually putting out. The
station then adjusts its output power to get closer to the
alignment power. This process is repeated for the desired level of
accuracy.
1. In the Alignment Menu Screen, tab over to the TX Power
field and press F2 to perform the alignment.
2. For this procedure, connect the TX UHF-type connector on
the station top panel to the RF input of either a Motorola
Table 7. Alignment Power by Frequency Band
Frequency Band Rated Power Alignment Power
VHF R1, VHF R2 30 W 25 W
UHF R1, UHF R2 30 W 25 W
UHF R3 30 W 27.5 W (110 W in RSS)
UHF R4 25 W 22.8 W (100 W in RSS)
800 MHz 22 W 20 W