NORMAL OPERATION - TM-11-5820-918-130037

TM 11-5820-918-13

Place BAT switch to ON position.

p. With the transmitter sweeping and the battery supply on, perform a transmitter

self test by pressing TEST switch. Two functions are checked.

(1) In the system test, a go/no-go indication is provided for determining oper-

ation of the synthesizer and power supplies. If the SYST green indicator lamp lights,

operation is correct. If the SYST red lamp lights, a malfunction is indicated. Refer

to the maintenance procedures of Section 5 for instructions to correct fault.

(2) (Applicable to units with non-rechargeable battery supply, P/N 6025-1008

only). The condition of the standby battery supply is also checked when the TEST

switch is actuated. If only the green BAT test lamp lights, the battery voltage is

23 volts or greater which is the acceptable condition. If both the green and red BAT

lamps light, the condition of the battery is marginal but operational (voltage between

18 and 23 volts). If only the red BAT lamp lights, the battery voltage is 18 volts

or lower, and the battery (18 alkaline D-cells) must be replaced.

(3) (Applicable to units with rechargeable battery supply, P/N 6025-1018 only).

The condition of the battery supply and charging circuit is also checked when the

TEST switch is activated. If only the green BAT lamp lights, the battery supply is

satisfactory (not fully discharged) and the charging circuit is operating. If the red

lamp or both red and green lamps light, the possible indications are: the BAT switch

is OFF; the battery supply or charging circuit is malfunctioning; or the battery sup-

ply is fully discharged. To check the actual charge of the battery, refer to proce-

3-8. NORMAL OPERATION. During normal operation of the transmitter following

performance of the start-up procedures, routine operator actions are performed in

coordination with, and usually at the direction of the RCS-4B receiver operator. Typ-

ical operations are as follows:

a. With the sweep and clock started, place MODE switch in PROG position. The

frequency sweep will advance from 2 MHz to the upper limit of either 16 or 30 MHz

(as selected by the UPPER FREQ switch) in each five minute period of the hour. The

individual five-minute periods are enabled or disabled by the path programmer MIN -

UTES switches. If a particular MINUTES switch is down, disabling the transmitter

sweep, the frequency display remains at 02.00 MHz and there is no transmitted signal

for that 5-minute interval. The transmitter MIN/SEC clock continues to run.

b. A transmitter self-test can be performed at any time and has no effect on trans-

mitter operation. Refer to step p, paragraph 3-7 above for description of self test

procedure.

c. Proper forward and reflected power can be measured at any time. In DIPLEX

with the FWD/REFL switch on the 1024 front panel in the FWD position, the needle

should remain in the green zone; with the switch in the REFL position, the needle

should remain below the red zone. In DIRECT mode, the measurement of forward and

reflected power may vary considerably depending on the load impedance of the an-

tenna. Meter readings inside and outside colored zones can be expected during nor-

mal opertion. As a general guide, if the forward power indication is in the green zone,

and the reflected power indication is below the red zone, then the VSWR is less than