Motorola MTR2000 T5544 Instruction / Field Service Manual page 149

Note
Note
68P81096E17-E
09/30/05
The R2600 Communications Analyzer can both generate and measure si-
multaneously. The R2001 may be used for either the generator or the mon-
itor function, but not both simultaneously. When using R2001 as the signal
generator, the RF signal must be taken from the Antenna port.
Calculating Proper Alignment Frequency
Use one of the following two methods to calculate the alignment frequen-
cy to be generated by the signal generator.
For stations which are equipped with both an external preselector and an
internal varactor-tuned preselector, always tune the external preselector to
an actual receive frequency after first tuning the varactor-tuned preselec-
tor (if required).
For stations with a single receive frequency, calculate the alignment fre-
quency as follows:
1. The station receive frequency is the midpoint frequency (F
2. If the receive frequency is in the range of 132 to 150 MHz, determine
the alignment frequency as follows:
If frequency (from Step 1) is ≤ 148 MHz, then:
•
alignment frequency = F
• Otherwise, use actual frequency from Step 1 (see above note).
3. If the receive frequency is in the range of 150 to 174 MHz, determine
the alignment frequency as follows:
If frequency (from Step 1) is ≤ 156 MHz, then:
•
alignment frequency = F
• Otherwise, use actual frequency from Step 1 (see above note).
For stations with multiple receive frequencies, calculate the alignment
frequency as follows:
1. Determine the midpoint (F
2. Calculate a midpoint frequency as follows:
F = (F
mid highest
3. Using F in place of the station receive frequency, perform Step 2
mid
and Step 3 from previous procedure (i.e., calculation of alignment for
single receive frequency).
– 250 kHz
mid
– 250 kHz
mid
) of the station receive frequency range.
mid
) ÷ 2
+ F
lowest
Troubleshooting
).
mid
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