INITIAL CONTROL SETTINGS

TM 11-5820-917-13

MINUTES switch. The sweep is inhibited for the 5-minute period when the MINUTES

switch is in the O position. At the end of each clock hour (end of the 55th minute

sweep interval), the cycle automatically repeats.

3-7. INITIAL CONTROL SETTINGS. Before turning power on, open small front panel

control door, and make the following preliminary control settings:

WARNING

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

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

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

dangerous voltage level.

a. Make sure that BATT switch is OFF. The only time that the BATT switch

should be on is when the receiver is on and synchronized with a transmitter. Also,

the BATT switch must be ON during receiver test.

b. Make sure AC line voltage select switch and fuse on 4028 unit are matched

to the local AC line power.

Set INPUT ATTEN (dB) switch to 0.

d. Set ANTENNA SELECT thumbwheel switches to the appropriate antenna input

jack number (1, 2 or 3) for each path. Each transmitter received by the RCS-4B

is assigned a path number (1, 2 or 3). Each path may have a separate receive antenna

or different paths may share an antenna. Assignment of path to receiver antenna

inputs may be done in any order or in any combination. For example, path 1 may use

antenna 1(J1); paths 2 and 3 may use antenna 2(J2), and antenna 3(J3) may not be

used at all; or all paths may use the same antenna. If all paths require the same

antenna, input J1 is normally used, but inputs J2 and J 3 will work equally well.

Make sure antenna(s) are connected to the 6043 power divider or directly to the

4028 as required.

e. Place FREQ switch in either 2-16 or 2-30 position depending on the selected

frequency sweep limit that corresponds with the transmitter setting. One switch

determines the sweep limit for all three paths.

3-8. START UP PROCEDURE. The pre-operative start-up procedure for the

receiver is performed as follows:

a. Press POWER switch to on (lighted) position. Timer and sweep may start

immediately.

b. Check that indicator lamps are good by pressing LAMP TEST switch. With

switch depressed indicators and digital display should light.

With MODE switch to MAN, press RESET pushbutton to set sweep to 02.00 MHz.

d. Turn MODE switch to SET 1 and press RESET. Then press START and RESET

again. Repeat for SET 2 and SET 3. All path clocks are now at OO:OO system time.

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