Chapter 5. FUNCTIONING OF EQUIPMENT

TM 11-5865-215-13

FUNCTIONING OF EQUIPMENT

Section I.

GENERAL

Scope.

The chapter provides theory of operation on simplified block dia-

gram, functional block diagram, and schematic diagram levels.

Organization.

Section II of this chapter provides a general and functional de-

scriptions of receiver control operation. Section III provides de-

tailed circuit theory for the reparable assemblies of the unit.

GENERAL AND FUNCTIONAL DESCRIPTIONS

Section II.

General Description.

The receiver control basically consists of front panel controls

and instruments, a microprocessor, and input/output (I/O) elements.

The front panel controls and instruments allow the operator to direct-

ly control an intercept receiver. The 6-digit frequency display in-

dicates the frequency that has been selected. The keyboard also dis-

plays which functions are active. Figure 5-1 is a simplified block

diagram of the receiver control. Figure FO-1 shows the color code

chart for military standard resistors, inductors, and capacitors.

Figure FO-3 is the receiver control wiring diagram and figure FO-4 is

the fan assembly wiring diagram.

The microprocessor scans the front panel controls and interprets

any activated keys and/or associated analog controls. The micro-

processor interprets these data and stores them in its memory, and

also relays these data in proper format to the I/O elements.

The 1/0 elements, which are input and output serial data, clock,

and load strobes go to tile various external devices that interact

with the receiver control . These devices are usually an intercept

receiver, a spectrum display, and a computer.