INSTALLATION AND DISASSEMBLY
2-6
November 1998
Part No. 001-7600-001
1. Monitor the transmit signal with a communications
monitor. Set it for HPF = Off, LPF = 20 kHz, De-
emphasis = Off, and Level = (P-P)/2.
2. Select a channel near the center of the band and turn
a long tone on (see preceding “NOTE”) by pressing
the appropriate front panel key.
3. Adjust potentiometer R18 (DEV) on the module for
the following deviation:
25 kHz Channel Spacing - ±3.5 kHz
20 kHz Channel Spacing - ±2.8 kHz
12.5 kHz Channel Spacing - ±1.7 kHz
4. Check channels on each end of the operating band to
make sure deviation is within the following
limits. If not, repeat preceding adjustment.
25 kHz Channel Spacing - ±3.0 to 5.0 kHz
20 kHz Channel Spacing - ± 2.4 to 4.0 kHz
12.5 kHz Channel Spacing - ±1.5 to 2.5 kHz
NOTE: It is recommended that scanning not be used
with these options because in may cause part or all of
the tone burst to be missed.
Summary of Contents for 761X
Page 9: ...GENERAL INFORMATION 1 4 November 1998 Part No 001 7600 001 This page intentionally left blank ...
Page 11: ...GENERAL INFORMATION 1 6 November 1998 Part No 001 7600 001 NOTES ...
Page 43: ...PROGRAMMING 4 18 November 1998 Part No 001 7600 001 This page intentionally left blank ...
Page 87: ...UHF 7640 EXPLODED VIEW 7 22 November 1998 Part No 001 7600 001 FOLDOUT VHF Exploded View ...
Page 90: ...8 3 November 1998 Part No 001 7600 001 VHF 7610 MAIN BOARD BOTTOM VIEW FOLDOUT ...
Page 91: ...8 4 November 1998 Part No 001 7600 001 VHF 7610 MAIN BOARD TOP VIEW ...
Page 94: ...8 7 November 1998 Part No 001 7600 001 UHF 7640 MAIN BOARD BOTTOM VIEW FOLDOUT ...