4-15
4.4
FIXED CHANNEL FREQUENCY SET UP
The following procedure fixes preselected channel frequencies and inhibits transmit on receive only
channels. After completion of this procedure the operator will be able select stored channels only for
receive or transmit. Keypad entry of frequencies is disabled.
4.4.1
System Configuration
(1)
Configure channel frequencies as desired (Refer to Section 4.3.5).
(2)
Select channels for Rx only (transmit inhibit) operation (Refer to paragraph 4.3.7).
4.4.2
Transceiver Disassembly/Assembly and Jumper Installation
(1)
Refer to Paragraph 2.2.1 for Transceiver installation and removal procedures.
(2)
Remove and retain 12 flathead screws (1) and 3 Panhead screws (2) securing
transceiver top cover (3) to chassis (4). Refer to Figure 4-3.
(3)
Position Jumper J6 on pin 1 and pin 2 to disable keyboard entry of frequency selection
and lock operating configuration.
(4)
Position Jumper J6 on pin 2 and pin 3 to enable keypad frequency selection and unlock
operating configuration.
(5)
Position Transceiver Cover (3) on Chassis (4). Ensure that cover holes are aligned with
threaded inserts.
(6)
Position 12 flathead screws (1) and 3 Panhead screws (2) through cover (3) holes into
chassis (4) threaded inserts. Tighten screws with fingers.
(7)
Tighten screws securing Transceiver Cover (3) to Chassis (4).
(8)
Refer to section 2 for Transceiver installation and removal procedures.
4.4.3
Operational Check
(1)
Turn Unit On (Refer to paragraph 4.2).
(2)
Recall Channels "00" through "25" (Refer to paragraph 4.3.6). Ensure that the frequencies
indicated for each channel displayed correspond to those selected.
(3)
Transmit on each channel. Observe that the TX Led (Refer to Figure 4-2, for location) does
not light on channels selected to operate exclusively in receive mode.
(4)
Enter a valid frequency (within the frequency range of (117.975 MHz to 138 MHz) that differs
from the frequency stored in channel "00".
Summary of Contents for TiL-91-DE/8.33
Page 29: ...4 14 Figure 4 3 Fixed Channel Jumper Locations...
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