TM 11-6625-486-14&P
Table 6-14. Audio Power Output with External Rf Input Signal Test-Continued
Control Settings
Step
No. Test Equipment
Test Procedure
Performance Standard
Equipment under test
15
Same as step No. 13,
Same as step No. 14,
Same as step No. 13-
Same as step No. 1.
except:
except: TUNING: 100
AN/URM-44A:
MHz.
FREQUENCY RANGE:
D.
FREQUENCY: 100
MHz.
16
Same as step No. 15,
Same as step No. 14,
Same as step No. 13.
Same as step No. 1.
except:
except: TUNING: 130
AN/URM-44A:
MHz.
FREQUENCY: 130
MHz.
17
Same as step No. 13
Same as step No. 14.
Same as step No. 13.
Same as step No. 2.
except:
AN/URM-44A:
FREQUENCY RANGE:
E.
FREQUENCY: 260
MHz.
18
Same as step No. 17,
Same as step No. 14,
Same as step No. 13.
Same as step No. 2.
except:
except: TUNING: 100
AN/URM-44A:
MHz.
FREQUENCY: 400
MHz.
19
AN/URM-49(*): Same as step No. 14.
Disconnect AN/URM-44A.
Same as step No. 2.
SIGNAL FREQUENCY
Connect AN/URM-49(*) to
MC: 520 MHz.
AN/USM-159(*) ANT.
MODULATION
connector.
SELECTOR: CW.
Adjust PWR SET control for
midscale reference mark.
Adjust OUTPUT AT-
TENUATOR for 0.1 volt.
20
Same as step No. 14, Same as step No. 15. Same as step No. 19.
Same as step No. 2.
except:
AN/URM-49(*):
SIGNAL FREQUENCY
MC: 800 MHz.
21
Same as step No. 14,
Same as step No. 14,
Same as step No. 19.
Same as step No. 2.
except:
except: TUNING: 125
MHz.
AN/URM-49(*):
SIGNAL FREQUENCY
MC: 1,000 MHz.
22
Same as step No. 19,
Same as step No. 14,
Same as step No. 19.
Same as step No. 2.
except:
except: TUNING: 130
MHz.
AN/URM-49(*):
SIGNAL FREQUENCY
MC: 520 MHz.
23
Repeat steps 1 through 22 with
power cord of AN/USM-
159(*) disconnected from
front panel.
6-42. Performance Test Summary
b. Crystal Oscillator Frequency.
(1) Check at 1 MHz and 2.5 MHz.
a. Frequency Drift with Change in Line Voltage.
(2) Must be within 5 Hz of 1 MHz, and 12.5 Hz
(1) Ac line voltage changes between 103 and
of 2.5 MHz.
230 Vac.
c. Frequency Resetability . Must be within 0.005
(2) Frequency drift should not exceed 0.005
%.
%.
6-48
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