ADJUSTMENT PROCEDURE-continued - TM-11-5820-670-300241

TM 11-5820-670-30

2-37. HOMING ADJUSTMENT. (CONT)

EL1AT249

Adjust vertical needle adjust potentiometer R4805, located on homer-detector amplifier

assembly for a center-scale indication on homing indicator.

5. Vary signal generator output from minimum signal to 10 microvolt. Flags on homing indicator

should disappear when signal generator output is 1.2 microvolt or less; vertical needle

should stay centered ( 1/8 inch).

6. Set signal generator output to 35 microvolt and adjust horizontal needle potentiometer R4830,

located on homer-detector amplifier assembly, so homing indicator horizontal needle is

1/8 inch below center of indicator.

7. Adjust signal generator output for 10 microvolt. Set test set LEFT HOMER ATTEN to 3 db, and

adjust center course sensitivity potentiometer R4826 so homing indicator vertical needle

deflects right of center one-half of full scale.

8. Set RIGHT HOMER ATTEN to 3 db and LEFT HOMER ATTEN to 0 db. Repeat step 7 and ensure

homing indicator vertical needle deflects left of center one-half of full scale.

2-149