5
GTR 8000 Base Radio Optimization
Your Motorola Field Representative or Motorola System Support Center (SSC) can advise you on optimization
activities required for your system, if any. See
8.5 Using Motorola System Support Center (SSC), page 8-8
This chapter contains optimization procedures and recommended settings relating to GTR 8000 Base Radio.
5.1 Aligning the Internal Frequency Reference
Oscillator
The transceiver option card within a base radio or receiver provides an internal 10 MHz frequency reference which
can be used as the primary or backup frequency reference source for the device. For conventional base radio/receiver
operation, it also provides the analog interfaces and wildcard I/Os.
After a base radio or receiver is installed or after the transceiver option card is replaced, the internal frequency
reference oscillator must be aligned.
The transceiver option card internal frequency reference oscillator must be aligned to within 1 ppb (parts per billion).
The measuring equipment used to make this alignment should be accurate to within 1 ppb. This accuracy typically
requires test equipment with a double oven or a Rubidium reference oscillator.
The base radio or receiver must be turned on for at least one week before the internal frequency reference
oscillator is aligned.
The internal frequency reference oscillator for an OCXO transceiver option card must be aligned:
• Upon installation of the base radio or receiver for all bands.
• Once every two years after installation for 700/800 MHz systems.
• Once every five years after installation for UHF systems.
• VHF systems do not require alignment after initial installation.
The internal frequency reference oscillator for a TCXO transceiver option card must be aligned:
• Upon installation of the base radio or receiver for UHF.
• Every year after installation for UHF.
The internal frequency reference oscillator can be aligned using two methods: manual alignment or auto alignment.
The internal frequency reference oscillator can only be aligned on a GPW 8000 Receiver using the auto
alignment procedure.
See Base Radio Service Help > Service Screens > Alignment Screens in the
CSS Online Help
for the alignment
procedures.
6871022P86-A - November 2012
5-1
Summary of Contents for GTR 8000
Page 2: ......
Page 4: ......
Page 6: ......
Page 14: ......
Page 18: ......
Page 22: ......
Page 26: ......
Page 60: ......
Page 177: ...5 8 1 3 VHF Tuning Procedure Figure 5 1 Preselector Tuning VHF 6871022P86 A November 2012 5 7 ...
Page 181: ...5 8 2 3 UHF Tuning Procedure Figure 5 2 Preselect Tuning UHF 6871022P86 A November 2012 5 11 ...
Page 230: ......
Page 234: ......
Page 244: ......
Page 286: ......
Page 300: ......
Page 338: ......