IFR NAVAIR NAV-750 Technical Manual Download Page 30

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NAVAIR 17—2OAX—737

CALIBRATION CHECKLIST

TEST

INST (S)

IFR Inc. NAV—750, NAV—750A, and NAV—750B VOR/LOC/COMM and G/S Bench Test Sets

PROC. NO.

NA 17-2OAX-737

MFG.

MODEL

SER. NO.

PROCEDURE

STEP

NO.

(1)

FUN~flONTESTED

(2)

NOMINAL

(3)

MEASURED VALUES

OUT

TOL
~

CALIBRATION TOLERANCES

(7)

FIRST RUN

(4)

SECOND RUN

(5)

3.3

Meter Zero

——

()

Adjust, if necessary

(in)

3.6

RF Type N connector

0.197

±0.01

4.1

Frequency Accuracy Tests

(MHz)

—

(MHz)

4.1.5

108.000

108.0

107.999892 to

108.000108

4.1.6

130.000

130.0

—

129.999870 to

130.000130

4.1.7

157.000

157.0

—

156.999843 to

157.000157

4.1.8

328.000

328.0

—

327.999672 to 328.000328

4.1.9

335.000

335.0

334.999665 to 335.000335

4.1.11*

070.000

70.0

—

69.999930 to

70.000070

4.1.12*

079.000

79.0

78.999921 to

79.000079

4.2

Attenuator Frequency Respon

Tests

(dBm)

(MHz)

(dBm)

4.2.4

—30

108.000

—30.0

—28.5

—31.5

4.2.5

“

115.000

“

—

“

‘~

125.000

‘~

135.000

‘~

~‘

145.000

“

~‘

‘~

157.000

‘

‘~

4.2.7

“

328.000

“

—

“

4.2.8

“

330.000

“

—

“

332.000

“

335.000

“

—

“

4.2.11*

“

070.000

“

—

“

4.2.12*

“

072.000

“

,,*

“

074.000

“

—

“

,,*

“

076.000

“

,,*

“

079.000

“

*Applicable only if TI is a NAV—750B.

Page 1

Summary of Contents for NAVAIR NAV-750

Page 1: ...ED FOROFFICIAL USE OR FOR ADMINISTRATIVEOR OPERATIONAL PURPOSES ONLY OTHER REQUESTS FOR THIS DOCUMENT SHALL BE REFERRED TO NAVY MEASUREMENT SCIENCE DIRECTORATE NAVAL WARFARE ASSESSMENTDIVISION P0 BOX5...

Page 2: ...sts Attenuator Linearitv Tests DEMOD Tones and DC OFFSET Tests Tone Frequency Tests Tone Distortion Tests Percent Amplitude Modulation of Tones and Modulation Meter Tests RF Level Meter Tests VOR Bear...

Page 3: ...nce 1 5 dB 6 dBm to 50 dBm 2 5 dB 51 dBm to 120 dBm Range 6 to 50 dBm Tolerance 1 5 dB Range 51 to 120 dBm Tolerance 2 5 dB Tone frequencies 30 90 150 1020 and 9960 Hz DC offset 40 mV to 40 mV dc Tone...

Page 4: ...335 000 MHz 20 dBc from 70 000 to 79 000 MHz NAV 750B only NAV 750 only Frequency 108 000 MHz Tolerance 68 dB below carrier 12 5 kHz and 71 dB below carrier 25 0 kHz in 300 Hz resolution bandwidth Fr...

Page 5: ...ion bandwidth Frequency 334 700 MHz Tolerance 68 dB below carrier 20 kHz in 300 Hz resolution bandwidth NAV 750A and NAV 750B Frequency 108 000 MHz Tolerance 78 dB below carrier 15 kHz in 300 Hzresolu...

Page 6: ...MIL C 71B gage kit SECTION 2 EQUIPMENT REQUIREMENTS NOTE Minimum use specifications are the principal parameters required for performance of the calibration and are included to assist in the selectio...

Page 7: ...of measuring distortion down to 0 1 with 0 01 resolution No known substitute Range 50 MHz to 1 2 GHz Resolution 300 Hz mm Dynamic range 85 dB Range 0 to 0 197 inch Uncertainty 0 0025 inch MIL C 71B T...

Page 8: ...Meter function switch to MASTER MOD control to 1020 Hz indent tone MOD control to 9960 HzFM tone MOD control to 30 Hz tone MOD control to 01 05 degree bearing switch to LOC DDM switch to LOC variable...

Page 9: ...999892 and 108 000108 MHz 4 1 6 Set the TI FREQUENCY MHz switches to 130 000 and verify that the electronic counter indicates between 129 999870 and 130 000130 MHz 4 1 7 Set the TI FREQUENCY MHzswitch...

Page 10: ...switches to the following settings At each setting verifythat the power meter indicates within the tolerance limits listed TI FREQUENCY MHz Switch Setting Power Meter Tolerance Limits dBm 115 000 125...

Page 11: ...librator INSTR PRESET key Blue key AUTOMATIC OPERATION key and ensure that the signal generatorcalibrator is in the FREQ measurement mode and tunes to the TI FREQUENCY MHz switches setting Set the sig...

Page 12: ...z tone and that the DMM indicates between 40 0 and 40 0 mV dc 4 4 3 4 Set the TI LOC G S frequency switch to G S 4 4 3 5 Ensure that the TI frequency display indicates 334 700 and the G S mode indicat...

Page 13: ...icates between 80 0 to 80 0 mV dc 4 4 3 23 Set the TI meter function and tone selector switch to 1300 Hz 4 4 3 24 Verify that the oscilloscope displays a 1300 Hz tone and that the DMM indicates betwee...

Page 14: ...y that the electronic counter indicates between 149 97 and 150 03 Hz 4 5 11 Set the TI LOC G S frequency switch to LOC 4 5 12 Verify that the electronic counter indicates between 149 97 and 150 03 Hz...

Page 15: ...off position 4 5 22 Verify that the electronic counter indicates between 29 994 and 30 006Hz 4 5 23 Set the TI 9960 FM tone modulation control to the CAL UNCALlamp off position the FREQUENCY MHz switc...

Page 16: ...t of a 30 Hz fundamental as applicable 4 6 3 Verify that the distortion analyzer indicates 0 5 total harmonic distortion 4 6 4 Set the TI FREQUENCY MHz switches to 108 100 and set the G S DDM switch t...

Page 17: ...t of a 400 Hzfundamental as applicable and verify that the distortion analyzer indicates 0 7 total harmonic distortion 4 6 24 Set the TI meter function and tone selector switch tol300 Hz 4 6 25 Set th...

Page 18: ...z tone modulation control to the CAL UNCALlamp off position and the 9960 Hz tone modulation control to the CAL UNCALlamp off position 4 7 12 Activate the signal generatorcalibrator 300 Hz HP FILTER an...

Page 19: ...Press the signal generatorcalibrator INSTR PRESET key Blue key AUTOMATIC OPERATION key and ensure that the signal generatorcalibrator is in the FREQ measurement mode and tunes to the TI FREQUENCY MHz...

Page 20: ...9 4 8 6 Set the TI FREQUENCY MHz switches to 072 000 4 8 7 Verify that the TI meter needle is aligned over the RF Level vertical mark within 1 5 needle widths 4 8 8 Advance the TI FREQUENCY MHz switc...

Page 21: ...tor T S indicates 270 00 0 05 4 9 15 Set the TI TO FROM switch to the TO position and press the 270 VOR bearing select pushbutton Ensure that the TI bearing display indicates 270 4 9 16 Verify that th...

Page 22: ...d in step 4 11 4 is 2 75 mV rms 4 11 6 Disconnect the DMM from the TI NOTE Performthe appropriate Spectral Purity Tests subsection corresponding to the TI being calibrated 4 12 for NAV 750 4 13 for NA...

Page 23: ...ndwidth to 10 Hz and the reference level and position controls as necessary for a single sideband noise measurement at 20 kHz from the TI 334 700 MHz carrier frequency 4 12 9 Verify that the single si...

Page 24: ...his step 4 12 20 Set the TI frequency switches to 108 000 MHz 4 12 21 Set the spectrum analyzerfor a frequency span of 10 kHz div the resolution bandwidth to 300 Hz the video bandwidth to 300 Hz and t...

Page 25: ...ry for a single sideband noise measurement at 20 kHz from the TI 334 700 MHz carrier frequency 4 13 9 Verify that the single sideband noise level is 74 dB below the carrier level 4 13 10 Set the TI fr...

Page 26: ...en converting 300 Hz bandwidth data to 1 kHz bandwidth data subtract5 23 dB from the 300 Hz bandwidth data 4 13 22 Verify that the broadband noise is 82 dB below the TI 334 700 MHz carrier level See t...

Page 27: ...nd its harmonics of all the selected TI frequencies are 30 dB below the carrier level TI FREQUENCY MHz Switches Setting 329 000 332 000 335 000 4 14 7 Set the TI FREQUENCY MHz switches to 070 000 4 14...

Page 28: ...4 14 19 Verify that the harmonic spurious noise is 83 dB below the carrier level at 25 0 kHz from the TI 334 700 MHzcarrier frequency 4 14 20 Set the spectrum analyzer for a frequencyspan of 10 kHz di...

Page 29: ...generator calibrator INSTR PRESET key Blue key AUTOMATIC OPERATION key and ensure that the signal generator calibrator is in the FREQ measurement mode and tunes to the TI FREQUENCY MHzswitches setting...

Page 30: ...Hz MHz MHz 4 1 5 108 000 108 0 107 999892 to 108 000108 4 1 6 130 000 130 0 129 999870 to 130 000130 4 1 7 157 000 157 0 156 999843 to 157 000157 4 1 8 328 000 328 0 327 999672 to 328 000328 4 1 9 335...

Page 31: ...40 0 38 5 to 41 5 50 50 0 48 5 to 51 5 60 60 0 57 5 to 62 5 70 70 0 67 5 to 72 5 80 80 0 77 5 to 82 5 90 90 0 87 5 to 92 5 100 100 0 97 5 to 102 5 4 4 DEMOD Tones and DC OFFS T Tests 4 4 3 3 90 Hzton...

Page 32: ...Hz tone ck NA Displayed V dc mV dc DC offset 0 0 80 0 to 80 0 4 4 3 24 1300 Hz tone ck NA Displayed V dc mV dc DC offset 0 0 80 0 to 80 0 4 4 3 26 3000 Hz tone ck NA Displayed V dc mV dc DC offset 0 0...

Page 33: ...90 ck 0 4 thd 4 6 9 90 ck 0 4 thd 4 6 12 150 ck 0 4 thd 4 6 14 150 ck 0 4 thd 4 6 17 30 Variable ck 0 5 thd 4 6 20 1020 ck 0 5 thd 4 6 23 400 ck 0 7 thd 4 6 25 1300 ck 0 7 thd 4 6 27 3000 ck 0 7 thd...

Page 34: ...0 28 8 to 31 2 4 7 34 95 AM 400 Hz 95 0 92 15 to 97 85 4 7 35 0 100 Meter Scale ck 3 0 AM of step 4 7 34 4 7 37 95 AM 1300 Hz 95 0 92 15 to 97 85 4 7 40 95 AM 3000 Hz 95 0 92 15 to 97 85 4 8 RF Level...

Page 35: ...0 4910 FROM 180 00 00000 005 4912 T090 900 9000 005 4 9 14 FROM 90 270 0 270 00 0 05 4 9 16 TO 270 4 9 18 FROM 270 90 0 90 00 0 05 4 10 LOC Centering Test 4 10 3 150 Hz DEMOD voltage NA Record 4 10 5...

Page 36: ...108 000 25kHz ck 71 4 12 16 334 700 12 5 kHz ck 63 4 12 17 334 700 Q 25kHz ck 74 4 12 19 334 700 100kHz ck Brd 80 4 12 22 108 000 100kHz ck 80 4 13 Spectral Purity Tests NAV 75 A only MHz Harmonics 4...

Page 37: ...al Purity Tests NAV 75 B only MHz Harmonics 4 14 4 108 000 ck 30 dBc 115 000 ck 130 000 ck 145 000 ck 157 000 ck 4 14 6 329 000 ck 332 000 ck 335 000 ck 4 14 8 070 000 ck 20 dBc 075 000 ck 079 000 ck...

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