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Page Title:
OPERATIONAL CHECK. (CONT) |
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 TM 114625-2975-12
3-9. OPERATIONAL CHECK. (CONT)
INDICATION
ACTION
FREQUENCY display should read 330.950
40. Press LOC/GS key.
(paired GS frequency). If not, refer test
set to higher level of maintenance.
FREQUENCY display should read 108.100. If
41. Enter a frequency of 106.10 MHz.
not, refer test set to higher level of
maintenance.
NOTE
The next step should cause RDL/DDM/MOD display to sequentially display readings of
.046, .093,.155, and .200.
42. Repeatedly press STEP ∆ RDL
RDL/DDM/MOD display should sequentially
∆ DDM key.
read .046, .093, .155, and .200. If not,
refer test set to higher level of maintenance.
RDL/DDM/MOD display should show a contin-
43. Press and hold
key.
uous decrease. If not, refer test set to
higher level of maintenance.
44. Release
key.
RDL/DDM/MOD display should show a contin-
45. Press and hold
key.
uous increase. If not, refer test set to
higher level of maintenance.
46. Release
key.
RDL/DDM key lamp should light. If not, see
47. Press RDL/DDM key.
48. Using DATA ENTRY keys, enter .400.
RDL/DDM/MOD display should read .400. If
49. Press ENTER key.
not, refer test set to higher level of
maintenance.
U/L (150 Hz) indicator should go off and D/R
50. Press T/F U/L D/R key.
(90 Hz) indicator should light. If either or
both of these indications do not occur as
described, refer test set to higher level of
maintenance.
D/R (90 Hz) indicator should turn off and U/L
51. Press STD key.
(150 Hz) indicator should turn on. If either
or both of these indications do not occur as
described, refer test set to higher level of
maintenance.
3-11
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