IFR NAVAIR NAV-750 User Manual

NAVAIR 17—2OAX—737
4.2 ATI’ENUATOR FREQUENCY RESPONSE TESTS
4.2.1 Connect the power sensor to the powermeter. Zero and reference calibrate the power sensorand
powermeter.
4.2.2 Set the TI attenuator to —30 dBm. and the TI frequency switches to 108 MHz. Connect the power sensor input to the TI RF output connector.
4.2.3 Set the power meter controls for auto ranging or —25 dBm range, as applicable.
NOTE
For that following tests, set the power meter calibration factor switch to the appropriate
setting corresponding to the power sensor cal chart at the test frequency
(TI FREQUENCY MHz switchessetting).
4.2.4 Verify that thepowermeter indicates between —28.5 and—31.5 dBm.
4.2.5 Set the TI FREQUENCY MHz switches to the followingsettings. At each setting, verify that the
power meter indicates within the tolerance limits listed.
TI
FREQUENCY MHz
Switch Setting
Power Meter
Tolerance Limits
(dBm)
115.000
125.000
135.000
145.000
157.000
—28.5 to —31.5
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4.2.6 Setthe TI FREQUENCY MHz switches to 328.000.
4.2.7 Verify that the TI G/S Mode indicator is on, and that thepowermeter indicates between —28.5 and
—31.5 dBm.
4.2.8 Set the TI FREQUENCY MHz switches to the following settings. At each setting, verify that the
power meter indicates within the tolerance limitslisted.
TI
FREQUENCY MHz
Switch Setting
Power Meter
Tolerance Limits
(dBm)
330.000
332.000
335.000
—28.5 to —31.5
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4.2.9 If the TI is a NAV—750B continue with step 4.2.10. Otherwise, if the TI is not a NAV—750B,
proceed to step 4.2.13.
4.2.10 Set the TI FREQUENCY MHz switches to 70.000.
4.2.11 Verify that thepowermeter indicates between —28.5 to —31.5 dBm.
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IFR NAVAIR NAV-750 Specifications

General

Brand	IFR
Model	NAVAIR NAV-750
Category	Test Equipment
Language	English