Programmed Control Mode

TM 11-5865-215-13

(2) Manual (nonkeyboard ) control. the MANUAL TUNING control is

provided as an alternative to using keyboard numeric(s) for tuning

the receiver. The operator has the option of three different tuning

resolutions by using the MANUAL TUNING control in conjunction with a

selected COARSE, MEDIUM, or FINE key. MAN TUNE is automatically op-

erable except when sweeping or stepping, or when intentionally de-

activated.

NOTE

The MAN TUNE key automatically lights and the mode

becomes active when in the AUTO SWEEP or AUTO STEP

mode of operation with the HOLD key pressed.

(a) Receiver frequency is controlled by rotating MANUAL TUNING

control.

Tuning resolution is selected by pressing FINE,

MEDIUM, or COARSE key. The pressed key will light.

(b) To deactivate MANUAL TUNING control press MAN TUNE key.

Both MAN TUNE and FINE, MEDIUM, or COARSE key will go out.

c. Programmed Control Mode. The internal receiver control memory

has two volatile data files, which provide a total of 20 registers.

These registers provide storage for up to 20 different sets of re-

ceiver tuning and operating commands. Of these, 10 registers (AO

thru A9) comprise the data A file, and 10 registers (B0 thru B9) com-

prise the data B file. These registers are duplicated by the system

computer so that, in the event of system power loss, the computer is

able to reenter the receiver command data lost by the volatile re-

ceiver control internal memory. The receiver control operator may

change the contents of any register via the keyboard. This change

automatically updates the duplicate data files of the computer when

the STO key is pressed. The preprogrammed command data are recalled

for operator convenience or are used for programming a sequence of

receiver commands in the programmed auto-step mode of operation.

( 1 ) Command programming.

(a) Select desired tuning frequency by using keyboard nu-

meric(s). Observe that frequency selection is presented

on TUNING FREQUENCY (MHZ) display.

(b) Select desired operating commands from RECEIVER FUNCTIONS

keys. Observe that selected keys light.

(d) Select desired data file by toggling DATA A/DATA B key

until appropriate light goes on.

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