Chapter 3. OPERATING INSTRUCTIONS

TM 11-6625-1702-12

CHAPTER 3

OPERATING INSTRUCTIONS

t i o n s of the controls, indicators, and connec-

3-1. Controls, Indicators, and Connectors

T h e chart below lists and indicates the func-

t o r s on the AN/ARM-115 (fig. 3-1).

Control, indicator, or connector

Function

MV OUTPUT (±) jack ------------------------

Provides a plus or minus 0- to 500-mv output for testing the unit

u n d e r test.

MV OUTPUT (COMMON) jack ------------------------

Provides a dc common for the 0- to 500-mv output.

Coupler

mount

---------------------------------------

P r o v i d e s a mount for the unit under test. Mount consists of four

m o u n t i n g studs fastened to the control panel and a mounting

guide line etched into the control panel.

P r o v i d e s a power connection for the unit under test.

POWER-------------------------------------------------

Provides an rf connection for the unit under test.

RF-----------------------------------------------------------------

P r o v i d e s connections for control of the unit under test when the

POWER CONTROL OUTPUT----------------------

unit is tested on the ground plane (interconnected to unit under

t e s t , using W1).

Provides connections for rf power to the unit under test when the

RF OUTPUT---------------------------------------------------------

unit is tested on the ground plane (interconnected to unit under

t e s t , using W2).

P r o v i d e s connections for monitoring the external tune indications

MOTOR PULSING SIGNAL--------------------------------

on the oscilloscope.

P r o v i d e s connections for rf power source used to test the unit

INPUT-----------------------------------------------------------

u n d e r test.

28V INPUT (+) red---------------------------------------------

Provides connections to external 28-volt power source.

Provides connection to external 28-volt power source common.

28V INPUT () black------------------------------------

Provides protection for the 28-volt power source.

FUSE 2 AMP-------------------------------------------------

Provides the results of tests to the unit under test.

Microammeter- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Provides an indication when the unit under test is tuning.

TUNE INDICATOR - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

U s e d to accurately adjust the 0- to 500-mv source.

MV ADJUST control- - - - - - - - - - - - - - - - - - - - - - -

RF SELECT switch- - - - - - - - - - - - - - - - - - - - - - - -

Used to couple the rf power to the control panel RF plug or the

RF OUTPUT jack.

MANUAL TUNE switch- - - - - - - - - - - - - - - - - - - - - - - -

Used to manually control the direction of tuning the antenna

s e r v o m o t o r . This toggle switch has a center OFF position.

METER FUNCTION

(8-position

rotary)

Used to select the different test voltages and to measure standing

switch.

wave ratio of 437S-l/lA antenna.

Action

Switch position

28VDC----------------------------------

Provides for measurement of 28-volt source.

FWD (RF POWER 10W SCALE) - - - - - - - - - - - - - - - - -

P r o v i d e s for forward power measurement of up to a 10-watt rf

p o w e r source.

P r o v i d e s for reflected power measurement of up to a 10-watt rf

REF (RF POWER 10W SCALE)- - - - - - - - - - - - - - - - - - - - - - -

power source.

OFF - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

T u r n s metering circuit off.

REF (RF POWER 35W SCALE) - - - - - - - - - - - - - - - -

P r o v i d e s for reflected power measurement of up to a 35-watt rf

power source.

FWD (RF POWER 35W SCALE) - - - - - - - - - - - - - - -

P r o v i d e s for forward power measurement of up to a 35-watt rf

p o w e r source.

0-500 MV (+) - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

P r o v i d e s for selection and measurement of positive 0- to 500-

millivolt power source.

0-500 MV () - - - - - - - - - - - - - - - - - - - - - - - - - - - -

P r o v i d e s for selection and measurement of negative 0- to 500-

millivolt power source.

3-1