Controls, Indicators, and Jacks

TM 11-6625-922-15

Control, indicator, or jack

Function

DELAY METER RANGE MS (2-position toggle)

Selects either a coarse or a fine delay reading.

switch

Sw pos

Function

3-10

DELAY meter indicates

coarse delay. For a mod-

ulating frequency of 25

Hz, DELAY meter indi-

cates within a range of

10 milliseconds; 83-1/3

Hz, a range of 3 ms;

250 Hz a range of 1 ms.

15-15

DELAY meter indicates fine

delay. For modulating

frequency of 25 Hz, there

is a range of 0.5 MS

(500 us); 83-1/3 Hz,

0.15 MS (150 us); 250

Hz, 0.05 ms (50 us).

COARSE DELAY MS (4-position rotary) switch

Selects the particular coarse range for DELAY meter

reading.

FINE DELAY MS (20-position rotary) switch

Selects the particular fine range for DELAY meter

reading.

DELAY meter

Indicates envelope delay of an input signal, within a

time range in milliseconds, as determined by settings

of the 3 previously mentioned switches, and the se-

lected modulating frequency. Red numbers are used

with a modulating frequency of 83-1/3 Hz. When

DELAY METER RANGE MS switch is in 3-10 posi-

tion, correct delay is determined by adding algebrai-

cally the number setting of COARSE DELAY MS

switch and DELAY meter indication. When DELAY

METER RANGE MS switch is in .15-.5 position cor-

rect delay is determined by adding algebraically the

number setting of COARSE DELAY MS switch,

the number setting of FINE DELAY MS switch,

and the DELAY meter indication.

DELAY ZERO ADJ control

Adjusts signal delay within instrument, so that relative

delay of a reference signal can be read as zero, or

other convenient number.

REF RETURN-END TO END (2-position toggle)

Selects mode of operation.

switch

RANGE (KHZ) (2-position rotary) switch

Selects frequency range for carrier and reference fre-

quency.

CARRIER FREQUENCY control

Adjust output signal carrier frequency.

REFERENCE FREQUENCY control

Adjust reference carrier frequency.

SWEEP-CARRIER-REFERENCE (3-position rotary)

Sw pos

Function

switch

REFERENCE

Frequency of transmitted

signal is determined by

REFERENCE FREQUENCY

control.

CARRIER

Frequency of transmitted

signal is determined by

CARRIER FREQUENCY

control.

SWEEP

Frequency of transmitted

signal is determined by

CARRIER FREQUENCY

control, plus SWEEP con-

trols. In this position,

SWEEP CALIBRATE

switch is operative.

3-2