ALINEMENT PROCEDURE-continued - TM-11-5820-401-34-30335

TM 11-5820-401-34-3/0967-LP-432-3060

4-17. TUNER A1000 ALINEMENT. (CONT)

NOTE

During alinement of A1000 circuits, a reading of at least 10 db SINAD on the MM-100E

blue scale at 0.5-I.w rf indicates correct receiver sensitivity. However, problems in the

A4000 or A5000 can result in a lower SINAD even though the 1000 is properly alined.

Therefore, adjust all A1000 inductors and capacitors for best possible SINAD reading.

3. Adjust C1104 (1), C1205 (2), and C1305 (3) for highest SINAD reading. (See test

setup diagram )

4. Set AN/GRM-114A RF FREQUENCY MHz thumbwheels to 052 000 0.

5. Set R-442/VRC MC-TUNE-KC control to 52.00 MHz.

6. Adjust L1102 (4), L1202 (5), and L1302 (6), for highest SINAD reading.

7. Set AN/GRM-114A RF FREQUENCY MHz thumbwheels to 053 000 0.

8. Set R-442/VRC BAND switch to

9. Set R-442/VRC MC-TUNE-KC control to 53.00 MHz.

10. Adjust L1 103 (7), L1203 (8), and L1303 (9) for highest SINAD reading.

11. Set AN/GRM-114A RF FREQUENCY MHz thumbwheels to 065 000 0.

12. Set R-442/VRC MC-TUNE-KC control to 65.00 MHz.

13. Adjust C1 101 (10), C1201 (11), and C1301 (12) for highest SINAD reading.

14. Set AN/GRM-114A RF FREQUENCY MHz thumbwheels to 075 000 0.

15. Set R-442/VRC MC-TUNE-KC control to 75.00 MHz.

16. Adjust L1101 (13), L1201 (14), and L1301 (15) for highest SINAD reading.

4-119