Table 6-14. Transmit Current Limit Offset; Table 6-15. Transmit Current Limit Devices - Motorola ASTRO XTL 5000 Basic Service Manual

Radio Alignment Procedures: Transmitter Alignments
VHF 50 W/25 W
VHF 100 W
UHF R1 40 W
UHF R1 100 W
UHF R2 45 W
700–800 MHz 35 W
12. Left-click the Program All button to save tuned value.
13. Left-click the Close button to close screen and return to the Tuner Main Menu.
Band/Power Level
VHF 50 W/25 W
VHF 100 W
UHF R1 40 W
UHF R1 100 W
UHF R2 45 W
700–800 MHz 35 W
6.4.8 Tx Deviation Balance (Compensation)
NOTE: This alignment is required after replacing (or servicing) components on the transceiver board.
The Tx Deviation Balance (Compensation) alignment procedure balances the modulation
contributions of the low- and high-frequency portions of a baseband signal. Proper alignment is
critical to the operation of signaling schemes that have very low frequency components (for example,
DPL) and could result in distorted waveforms if improperly adjusted. This procedure needs to be
performed at multiple frequencies to allow for proper alignment across the entire RF band. The RF
band is divided into frequency zones with a calibration point (value) in each zone. When performing
this tuning procedure, the PTT Tone Low generates an 80 Hz modulation frequency. The deviation
level of this 80 Hz tone is used as the reference level for adjusting the deviation level of the PTT
Tone High, which is a 3 kHz modulation frequency.
This test can be done with either the R-2670 Communication Analyzer or the Agilent 8901
Modulation Analyzer. The method of choice is the R-2670 Analyzer.
• Initial setup using the R-2670 Communication Analyzer:
- Connect a BNC cable between the "DEMOD OUT" port and the "VERT/SINAD DIST/DMM
COUNTER IN" port on the R-2670.
6871769L01-A

Table 6-14. Transmit Current Limit Offset

Band/Power Level

Table 6-15. Transmit Current Limit Devices

Current Limit Offset
8
18
5
20
14
8
Devices
Final
Final1 Final2
Final1
Final1 Final2
Final1 Final2
Driver
Final2
Driver
Final2
Driver
October 30, 2006
6-15