INITIAL CONTROL SETTINGS AND START-UP PROCEDURES

TM 11-5820-918-13

c. Set Mode. In set mode, the transmitter clock can be started, advanced, or re-

set to zero. Although the STOP switch is illuminated with the MODE switch in SET po-

sition, the stop function is not enabled. The path programmer MINUTES switches are

active in the SET mode, and the frequency sweep will start automatically at each 5-

minute interval that is enabled in the same way as described below for the programmer

mode. The SET mode can be used for normal, automatic operation; however, since

the START, RESET, and ADV TIMER switches are active in this mode, it is a better

practice to operate in the programmer mode to prevent accidental reset of the system

clock .

d. Programmer Mode. The programmer mode is typically used for normal, auto-

matic operation after the transmitter and associated receiver are synchronized. In

this mode, a sweep may be initiated at each 5-minute interval of the hour depending

on the position selected for the programmer MINUTES switches. The START, STOP,

RESET, and ADV TIMER switches are disabled in this mode. A transmitter frequency

sweep is initiated for a particular 5-minute period if the corresponding programmer

MINUTES switch is in Up (on) position. The sweep is inhibited for the 5-minute period

when the MINUTES switch is in down (off) position. At the end of each clock hour

(end of the 55th minute sweep interval), the cycle automatically repeats.

3-7. INITIAL CONTROL SETTINGS AND START-UP PROCEDURES. In preparation

for normal operation of the transmitter, the following control settings are made and

start-up procedures performed. Most of the operating controls are located behind the

front panel door on the right side of the sweep generator unit. Perform the following

procedures:

WARNING

Make sure that the TCS-4B frame is grounded by the three-wire, three-

prong power cord or a separate ground strap before operating. If not

grounded the TCS-4B frame and exterior panel could be at a potentially

dangerous voltage level.

a. Make sure that the BAT switch is in OFF position. The only time that the BAT

switch should be ON is when the transmitter is on and synchronized with the receiver,

or to test for battery voltage.

b. Set DIRECT/DIPLEX switch to either position depending on the antenna coup-

ling to be used: DIPLEX if the antenna is being shared with a communications trans-

mitter, DIRECT if the antenna is dedicated to the TCS-4B transmitter. The DIRECT/

DIPLEX switch is a locking-type toggle switch. The toggle lever must be pulled out

to change position of the switch.

c. Connect antenna cable to 4011 front panel connector (RF Out to Antenna).

CAUTION

Ensure that correct connections to a communications transmitter from the

4011 front panel (RF IN) and from the 4011 front panel to the antenna

(RF OUT) are made. Incorrect connections can cause severe damage to

the TCS-4B.