Section 3. OPERATION - TM-11-5820-917-130039

TM 11-5820-917-13

SECTION 3

OPERATION

INTRODUCTION

3-2. This section provides the basic information required to operate the RCS-4B

receiver. The operating controls and indicators are illustrated, and the function of

each control and indicator is described.

3-3. CONTROLS AND INDICATORS

3-4. The controls and indicators required to operate the receiver are located on the

front panel of the receiver units. Operator controls consist of pushbutton switch-

indicators and toggle, thumbwheel, and rotary switches. Controls and indicators

are illustrated in figure 3-1 and functionally described in table 3-1.

3-5. OPERATING INSTRUCTIONS

3-6. GENERAL . The RCS-4B receiver operates in synchronization with up to three

TCS-4B transmitters. Once set up and synchronized, the receiver is capable of

fully automatic operation or can be manually controlled. Four modes of operation

are available: continuous, manual, set, and programmer. Each mode has a particular

purpose and provides different functions. A mode of operation can be selected or

the mode changed while the receiver is operating (frequency being swept) without

affecting the frequency sweep or system time.

a. Continuous Mode. The continuous mode of operation provides a continuous

scan on the operating frequency range and is intended for use during service test

of the receiver. With the MODE switch in CONT position, the receiver sweeps and re-

cycles continuously between the low of 2 MHz and the preset high of either 16 or 30

MHz. The PATH PROGRAMMER MINUTES switch and the RESET, START, and STOP

switches have no affect on receiver operations in this mode. If the sweep is stopped,

placing the MODE switch on CONT position starts the sweep. The sweep is terminated

by switching to any other mode or by resetting the sweep to 2.00 MHz in manual mode.

Continuous mode is used primarily for maintenance service of the receiver and is not

intended for normal operation.

b. Manual Mode. In manual mode, the receiver sweep is controlled by the START,

STOP, and RESET switches. This mode is used to reset the frequency sweep at

start up and to exercise manual control of receiver frequency during maintenance.

When started, the frequency sweep advances from 2.00 MHz to the preset high limit

and then resets to 2.00 MHz and stops. If, during a frequency sweep , the STOP switch

is activated, the sweep stops and the receiver remains tuned to the fixed frequency.

System time is not affected by actuation of START, STOP, or RESET switches in

manual mode; only the frequency sweep is controlled. In manual mode, data is dis-

played on the path 1 CRT display.

3-1