VOR/LOC Receiver Sensitivity Test

TM 11-5826-258-24

VOR/LOC receiver sensitivity at following fre-

Control

quencies:

1000

MOD. SELECTOR

108.00

111.30

114.60

117.90

FREQUENCY RANGE (selector) D

112.40

109.10

115.70

117.95

Desired frequency. Use

FREQUENCY

110.20

113.50

116.80

AN/USM-207 to set fre-

(1) Check to see that there is audio output present

quency within 1 Khz.

on the TS-585/U.

Peak on meter

AMP. TRIMMER

(2) Set the Output Attenuator control on the

SET LEVEL (red arrow)

OUTPUT LEVEL

AN/USM-44 for an indication of 5 microvolt on the

MOD LEVEL

OUTPUT VOLTS-DBM indicator.

b. Procedure. In the following procedure 108.00

(3) Note the indication on the TS-585/U meter.

megahertz is used as an example of a selected fre-

( 4 ) Turn the MOD. SELECTOR on the

quency; therefore, set the CONTROL frequency on the

AN/USM-44 to CW.

AN/ARM-92B to 108.00 Hz. Set the FREQUENCY

(5) The indication on the TS-585/U meter shall be

control to 108.00 megaHertz using the AN/USM-207

at least 6 db less than the indication in (3) above.

to set within 1 KHz. Use this procedure to check

3-20