User's Manual

9-42 68P81093C75-A
Step 4. If the Receiver Module is Range 3, determine the
alignment frequency as follows:
If the frequency (from Step 1) is > 492 MHz, then the
alignment frequency = 492 MHz.
If the frequency (from Step 1) is < 472 MHz, then the
alignment frequency = 472 MHz.
Otherwise, use the actual frequency from Step 1.
Step 5. If the Receiver Module is Range 4, determine the
alignment frequency as follows:
If the frequency (from Step 1) is > 510 MHz, then the
alignment frequency = 510 MHz.
If the frequency (from Step 1) is < 496 MHz, then the
alignment frequency = 496 MHz.
Otherwise, use the actual frequency from Step 1.
For stations with multiple receive frequencies, calculate the
frequencies of the alignment signal as follows:
Step 1. From the site documentation, or the RSS, note the
receive frequency for each channel supported by the
station.
Step 2. Calculate a midpoint frequency as follows:
F
mid
= (F
highest
+ F
lowest
) ÷ 2
Step 3. Using F
mid
in place of the station receive frequency,
perform Step 1 through Step 54 above.
Preparing Equipment Step 1. Make sure the Receiver Module (with the Preselector
Assembly) is installed in a functional PDR 3500.
Step 2. Remove the chassis from its case by removing the
eight Phillips screws from the edges of the station’s
top panel.
Step 3. Remove the two Torx screws from the Receiver
Module front panel and remove the four Phillips
screws. Remove the panel.