Aeroflex IFR 4000 Manual

VERIFICATION
IFR 4000
Subject to Export Control, see Cover Page for details. Page 1
Jun 1/11
Verification
VERIFICATION PROCEDURE PAGE
Self Test ------------------------------------------------------------------------------------------------- 3
RF Accuracy --------------------------------------------------------------------------------------------- 4
RF Level Accuracy (ANT Connector)---------------------------------------------------------------- 6
RF Level Accuracy (RF I/O Connector)------------------------------------------------------------- 9
Harmonic and Spurious-------------------------------------------------------------------------------- 12
VSWR (RF I/O and SWR Connectors)--------------------------------------------------------------- 14
Marker Beacon ------------------------------------------------------------------------------------------ 16
VOR ------------------------------------------------------------------------------------------------------- 17
Localizer ------------------------------------------------------------------------------------------------- 20
Glideslope ----------------------------------------------------------------------------------------------- 22
ILS--------------------------------------------------------------------------------------------------------- 24
COMM AM ------------------------------------------------------------------------------------------------ 27
COMM FM ------------------------------------------------------------------------------------------------ 28
SELCOM-------------------------------------------------------------------------------------------------- 29
Frequency Counter ------------------------------------------------------------------------------------- 30
AM Meter ------------------------------------------------------------------------------------------------- 32
FM Meter ------------------------------------------------------------------------------------------------- 33
SWR Meter----------------------------------------------------------------------------------------------- 35
Power Meter --------------------------------------------------------------------------------------------- 37
AM Audio - AUX Connector --------------------------------------------------------------------------- 43
121.5/243.0 MHz Beacon------------------------------------------------------------------------------ 44
406 MHz Beacon ---------------------------------------------------------------------------------------- 45
SSB Receive--------------------------------------------------------------------------------------------- 47
SSB Transmit-------------------------------------------------------------------------------------------- 48
ALTERNATE VERIFICATION PROCEDURE PAGE
RF Accuracy --------------------------------------------------------------------------------------------- 67
Marker Beacon ------------------------------------------------------------------------------------------ 70
VOR ------------------------------------------------------------------------------------------------------- 71
Localizer ------------------------------------------------------------------------------------------------- 74
Glideslope ----------------------------------------------------------------------------------------------- 77
ILS--------------------------------------------------------------------------------------------------------- 80

VERIFICATION
IFR 4000
Subject to Export Control, see Cover Page for details. Page 2
Jun 1/11
A. Verification Schedule
The Verification Procedures should be performed as a result of one or more of the following
conditions:
●Failure to Meet Specifications
If, during the course of normal operation, the Test Set or any major function thereof
fails to meet the performance specifications, the Verification Procedures should be
performed.
If any failure occurs during performance of the Verification Procedures, the user is
instructed as to the pertinent Calibration Procedure or hardware failure associated with
the failure.
●Module/Assembly Replacement
If one or more of the Test Set assemblies are replaced, the Verification Procedures
should be performed.
●Annual Verification
Aeroflex recommends an annual Verification on the Test Set to maintain proper testing
standards.
B. Precautions
The Verification Procedures are performed with the Test Set Covers in place. No internal
adjustments or probing points are required.
C. Requirements
(1) Performance
It is strongly recommended that personnel thoroughly read and understand all steps of
the procedures prior to performing each procedure. Knowledge of external test
equipment connections and operation is also recommended.
(2) Test Equipment
Appendix A contains a list of test equipment suitable for performing the Verification
Procedures. Other equipment meeting specifications listed in Appendix A may be
substituted in place of the recommended models.
(3) Disassembly
No disassembly is required to perform the Verification Procedures.
(4) Environment
For best results, environmental conditions should be identical to the conditions at the
normal operating location.
D. Test Record
Verification Data Sheets are provided for recording the results obtained while performing
the Verification Procedures.

VERIFICATION
IFR 4000
Subject to Export Control, see Cover Page for details. Page 3
Jun 1/11
E. Verification
The Verification Procedures are developed for system
software 2.0 and higher. If the unit being tested has
system software prior to 2.0, the COMM AM Screen
references in the verification steps can be performed
on the VHF AM and UHF Mode Screens.
Alternate Verification Procedures (para G)
are available for selected Test Set modes.
(1) Self Test
TEST EQUIPMENT: None
VERIFICATION FAILURE: If any step in this procedure fails or is out of tolerance,
this indicates a failure in the Test Set. Refer to the
IFR 4000 Maintenance Manual for corrective action.
STEP PROCEDURE
1. Connect Test Set to an appropriate AC power source with the External DC
Power Supply. Press POWER Key ON.
2. Press the SETUP Key to display the Setup Menu.
3. Press the H/W TOOLS Soft Key to display the Hardware Tools Screen.
4. Press the DIAGS Soft Key to display the Diagnostics Screen.
5. Press the SELFTEST Soft Key to display the Self Test Screen.
6. Press the RUN Soft Key to initiate the Self Test.
NOTE: The Self Test cannot be performed until the Test Set has finished the
warm-up cycle. If the user attempts to initiate the Self Test before the
Test Set is ready, the following message is displayed:
Instrument warming up
Please wait xx secs
The message counts down to zero (0) then the Self Test can be
initiated.
7. Verify all tests pass.

VERIFICATION
IFR 4000
Subject to Export Control, see Cover Page for details. Page 4
Jun 1/11
(2) RF Accuracy
TEST EQUIPMENT: Modulation Analyzer
VERIFICATION FAILURE: If any step in this procedure fails or is out of tolerance,
this indicates a failure in the Test Set. Refer to the
IFR 4000 Maintenance Manual for corrective action.
STEP PROCEDURE
1. Connect the Modulation Analyzer (RF Input) to the ANT Connector.
2. Configure the Modulation Analyzer as an RF Counter.
3. Press the SETUP Key to display the Setup Menu.
4. Set the Test Set as follows:
FIELD SETTING
PORT ANT
GEN FREQ PRESET
5. Press the MODE Select Key until the VOR Mode Screen.
6. Set the Test Set as follows:
FIELD SETTING
FREQ 108.000 MHz
RF LVL -20.0 dBm
MOD TONE OFF
7. Verify 108.0 MHz (±108 Hz) on the Modulation Analyzer.
8. Press the MODE Select Key until the LOCALIZER Mode Screen.
9. Set the Test Set as follows:
FIELD SETTING
FREQ 108.100 MHz
RF LVL -20.0 dBm
MOD TONE OFF
10. Verify 108.1 MHz (±108.1 Hz) on the Modulation Analyzer.
11. Press the MODE Select Key until the GLIDESLOPE Mode Screen.
12. Set the Test Set as follows:
FIELD SETTING
FREQ 334.700 MHz
RF LVL -20.0 dBm
13. Verify 334.7 MHz (±334.7 Hz) on the Modulation Analyzer.
14. Press the MODE Select Key until the MARKER BEACON Mode Screen.
15. Set the Test Set as follows:
FIELD SETTING
FREQ 75.000 MHz
RF LVL -20.0 dBm
MOD TONE OFF
16. Verify 75.0 MHz (±75 Hz) on the Modulation Analyzer.
17. Press the MODE Select Key until the COMM AM Mode Screen is displayed.

VERIFICATION
IFR 4000
Subject to Export Control, see Cover Page for details. Page 5
Jun 1/11
STEP PROCEDURE
18. Set the Test Set as follows:
FIELD SETTING
FREQ 118.000 MHz
RF LVL -20.0 dBm
MOD TONE OFF
19. If the COMM AM Mode Screen is in RECEIVING Mode, press the SWITCH
GEN/RX Soft Key to switch the COMM AM Mode Screen to GENERATING Mode.
20. Verify 118.0 MHz (±118 Hz) on the Modulation Analyzer.
21. Set the FREQ Field to 137.000 MHz.
22. Verify 137.0 MHz (±137 Hz) on the Modulation Analyzer.
23. Set the FREQ Field to 225.000 MHz.
24. Verify 225.0 MHz (±225 Hz) on the Modulation Analyzer.
25. Set the FREQ Field to 312.000 MHz.
26. Verify 312.0 MHz (±312 Hz) on the Modulation Analyzer.
27. Set the FREQ Field to 400.000 MHz.
28. Verify 400.0 MHz (±400 Hz) on the Modulation Analyzer.
29. Press the SETUP Key to display the Setup Menu.
30. Set the Test Set as follows:
FIELD SETTING
PORT ANT
GEN FREQ VAR
31. Press the MODE Select Key until the SELCAL Mode Screen is displayed.
32. Set the Test Set as follows:
FIELD SETTING
FREQ 118.001 MHz
RF LVL -20.0 dBm
33. Verify 118.001 MHz (±118.001 Hz) on the Modulation Analyzer.
34. Set the FREQ Field to 118.002 MHz.
35. Verify 118.002 MHz (±118.002 Hz) on the Modulation Analyzer.
36. Set the FREQ Field to 118.003 MHz.
37. Verify 118.003 MHz (±118.003 Hz) on the Modulation Analyzer.
38. Set the FREQ Field to 118.004 MHz.
39. Verify 118.004 MHz (±118.004 Hz) on the Modulation Analyzer.
40. Set the FREQ Field to 10.000 MHz.
41. Verify 10.000 MHz (±10 Hz) on the Modulation Analyzer.
42. Set the FREQ Field to 30.000 MHz.
43. Verify 30.000 MHz (±30 Hz) on the Modulation Analyzer.
44. Disconnect the Modulation Analyzer from the ANT Connector.

VERIFICATION
IFR 4000
Subject to Export Control, see Cover Page for details. Page 6
Jun 1/11
(3) RF Level Accuracy (ANT Connector)
TEST EQUIPMENT: Power Meter
Power Sensor
Measuring Receiver
VERIFICATION FAILURE: If any step in this procedure fails or is out of tolerance,
this indicates a failure in the Test Set. Refer to the
IFR 4000 Maintenance Manual for corrective action.
STEP PROCEDURE
1. Connect the Power Sensor to the Power Meter (POWER REF Connector) and
zero Power Meter.
2. Disconnect the Power Sensor from the Power Meter (POWER REF Connector)
and connect the Power Sensor to the ANT Connector.
3. Press the SETUP Key to display the Setup Menu.
4. Set the Test Set as follows:
FIELD SETTING
PORT ANT
FREQ VAR
5. Press the MODE Select Key until the COMM AM Mode Screen is displayed.
6. Set the Test Set as follows:
FIELD SETTING
FREQ 10.000 MHz
RF LVL -30.0 dBm
MOD TONE OFF
M MOD 0%
7. If the COMM AM Mode Screen is in RECEIVING Mode, press the SWITCH
GEN/RX Soft Key to switch the COMM AM Mode Screen to GENERATING Mode.
8. Verify -30 dBm (±3 dB) on the Power Meter.
9. Set the FREQ Field to 30.000 MHz.
10. Verify -30 dBm (±3 dB) on the Power Meter.
11. Set the FREQ Field to 75.000 MHz.
12. Set the RF LVL Field to -16 dBm.
13. Verify -16 dBm (±3 dB) on the Power Meter.
14. Set the RF LVL Field to -30 dBm.
15. Verify -30 dBm (±3 dB) on the Power Meter.
16. Set the FREQ Field to 108.000 MHz.
17. Set the RF LVL Field to -16 dBm.
18. Verify -16 dBm (±3 dB) on the Power Meter.
19. Set the RF LVL Field to -30 dBm.
20. Verify -30 dBm (±3 dB) on the Power Meter.
21. Set the FREQ Field to 108.100 MHz.
22. Set the RF LVL Field to -16 dBm.

VERIFICATION
IFR 4000
Subject to Export Control, see Cover Page for details. Page 7
Jun 1/11
STEP PROCEDURE
23. Verify -16 dBm (±3 dB) on the Power Meter.
24. Set the RF LVL Field to -30 dBm.
25. Verify -30 dBm (±3 dB) on the Power Meter.
26. Set the FREQ Field to 118.000 MHz.
27. Set the RF LVL Field to -16 dBm.
28. Verify -16 dBm (±3 dB) on the Power Meter.
29. Set the RF LVL Field to -30 dBm.
30. Verify -30 dBm (±3 dB) on the Power Meter.
31. Set the FREQ Field to 137.000 MHz.
32. Set the RF LVL Field to -16 dBm.
33. Verify -16 dBm (±3 dB) on the Power Meter.
34. Set the RF LVL Field to -30 dBm.
35. Verify -30 dBm (±3 dB) on the Power Meter.
36. Set the FREQ Field to 175.000 MHz.
37. Set the RF LVL Field to -16 dBm.
38. Verify -16 dBm (±3 dB) on the Power Meter.
39. Set the RF LVL Field to -30 dBm.
40. Verify -30 dBm (±3 dB) on the Power Meter.
41. Set the FREQ Field to 225.000 MHz.
42. Set the RF LVL Field to -16 dBm.
43. Verify -16 dBm (±3 dB) on the Power Meter.
44. Set the RF LVL Field to -30 dBm.
45. Verify -30 dBm (±3 dB) on the Power Meter.
46. Set the FREQ Field to 334.700 MHz.
47. Set the RF LVL Field to -16 dBm.
48. Verify -16 dBm (±3 dB) on the Power Meter.
49. Set the RF LVL Field to -30 dBm.
50. Verify -30 dBm (±3 dB) on the Power Meter.
51. Set the FREQ Field to 400.000 MHz.
52. Set the RF LVL Field to -16 dBm.
53. Verify -16 dBm (±3 dB) on the Power Meter.
54. Set the RF LVL Field to -30 dBm.
55. Verify -30 dBm (±3 dB) on the Power Meter.
56. Set the FREQ Field to 118.000 MHz.

VERIFICATION
IFR 4000
Subject to Export Control, see Cover Page for details. Page 8
Jun 1/11
STEP PROCEDURE
57. Set the RF LVL Field to the following settings and verify levels on the Power
Meter:
RF LVL LEVEL
-57 dBm -57 dBm (±3 dB)
-47 dBm -47 dBm (±3 dB)
-37 dBm -37 dBm (±3 dB)
-27 dBm -27 dBm (±3 dB)
-17 dBm -17 dBm (±3 dB)
-7 dBm -7 dBm (±3 dB)
+3 dBm +3 dBm (±3 dB)
+13 dBm +13 dBm (±3 dB)
58. Set the RF LVL Field to -67 dBm.
59. Disconnect the Power Sensor from the ANT Connector and connect the
Measuring Receiver to the ANT Connector.
60. Calibrate the Measuring Receiver for 118.000 MHz in Tuned RF Level Mode.
61. Verify -67 dBm (±3 dB) on the Measuring Receiver.
62. Disconnect the Measuring Receiver from the ANT Connector.

VERIFICATION
IFR 4000
Subject to Export Control, see Cover Page for details. Page 9
Jun 1/11
(4) RF Level Accuracy (RF I/O Connector)
TEST EQUIPMENT: Power Meter
Power Sensor
Measuring Receiver
VERIFICATION FAILURE: If any step in this procedure fails or is out of tolerance,
this indicates a failure in the Test Set. Refer to the
IFR 4000 Maintenance Manual for corrective action.
STEP PROCEDURE
1. Connect the Power Sensor to the Power Meter (POWER REF Connector) and
zero Power Meter.
2. Disconnect the Power Sensor from the Power Meter (POWER REF Connector)
and connect the Power Sensor to the RF I/O Connector.
3. Press the SETUP Key to display the Setup Menu.
4. Set the Test Set as follows:
FIELD SETTING
PORT RF I/O
FREQ VAR
5. Press the MODE Select Key until the COMM AM Mode Screen is displayed.
6. Set the Test Set as follows:
FIELD SETTING
FREQ 10.000 MHz
RF LVL -50.0 dBm
MOD TONE OFF
M MOD 0%
7. If the COMM AM Mode Screen is in RECEIVING Mode, press the SWITCH
GEN/RX Soft Key to switch the COMM AM Mode Screen to GENERATING Mode.
8. Verify -50 dBm (±2 dB) on the Power Meter.
9. Set the FREQ Field to 30.000 MHz.
10. Verify -50 dBm (±2 dB) on the Power Meter.
11. Set the FREQ Field to 75.000 MHz.
12. Set the RF LVL Field to -39 dBm.
13. Verify -39 dBm (±2.5 dB) on the Power Meter.
14. Set the RF LVL Field to -50 dBm.
15. Verify -50 dBm (±2 dB) on the Power Meter.
16. Set the FREQ Field to 108.000 MHz.
17. Set the RF LVL Field to -39 dBm.
18. Verify -39 dBm (±2.5 dB) on the Power Meter.
19. Set the RF LVL Field to -50 dBm.
20. Verify -50 dBm (±2 dB) on the Power Meter.
21. Set the FREQ Field to 108.100 MHz.
22. Set the RF LVL Field to -39 dBm.

VERIFICATION
IFR 4000
Subject to Export Control, see Cover Page for details. Page 10
Jun 1/11
STEP PROCEDURE
23. Verify -39 dBm (±2.5 dB) on the Power Meter.
24. Set the RF LVL Field to -50 dBm.
25. Verify -50 dBm (±2 dB) on the Power Meter.
26. Set the FREQ Field to 118.000 MHz.
27. Set the RF LVL Field to -39 dBm.
28. Verify -39 dBm (±2.5 dB) on the Power Meter.
29. Set the RF LVL Field to -50 dBm.
30. Verify -50 dBm (±2 dB) on the Power Meter.
31. Set the FREQ Field to 137.000 MHz.
32. Set the RF LVL Field to -39 dBm.
33. Verify -39 dBm (±2.5 dB) on the Power Meter.
34. Set the RF LVL Field to -50 dBm.
35. Verify -50 dBm (±2 dB) on the Power Meter.
36. Set the FREQ Field to 175.000 MHz.
37. Set the RF LVL Field to -39 dBm.
38. Verify -39 dBm (±2.5 dB) on the Power Meter.
39. Set the RF LVL Field to -50 dBm.
40. Verify -50 dBm (±2 dB) on the Power Meter.
41. Set the FREQ Field to 225.000 MHz.
42. Set the RF LVL Field to -39 dBm.
43. Verify -39 dBm (±2.5 dB) on the Power Meter.
44. Set the RF LVL Field to -50 dBm.
45. Verify -50 dBm (±2 dB) on the Power Meter.
46. Set the FREQ Field to 334.700 MHz.
47. Set the RF LVL Field to -39 dBm.
48. Verify -39 dBm (±2.5 dB) on the Power Meter.
49. Set the RF LVL Field to -50 dBm.
50. Verify -50 dBm (±2 dB) on the Power Meter.
51. Set the FREQ Field to 400.000 MHz.
52. Set the RF LVL Field to -39 dBm.
53. Verify -39 dBm (±2.5 dB) on the Power Meter.
54. Set the RF LVL Field to -50 dBm.
55. Verify -50 dBm (±2 dB) on the Power Meter.
56. Set the FREQ Field to 118.000 MHz.
57. Disconnect the Power Sensor from the RF I/O Connector and connect the
Measuring Receiver to the RF I/O Connector.
58. Calibrate the Measuring Receiver for 118.000 MHz in Tuned RF Level Mode with
a 3.8 Special entered.

VERIFICATION
IFR 4000
Subject to Export Control, see Cover Page for details. Page 11
Jun 1/11
STEP PROCEDURE
59. Set the RF LVL Field to the following settings and verify levels on the Measuring
Receiver:
RF LVL LEVEL
-12 dBm -12 dBm (±2.5 dB)
-22 dBm -22 dBm (±2.5 dB)
-32 dBm -32 dBm (±2.5 dB)
-42 dBm -42 dBm (±2 dB)
-52 dBm -52 dBm (±2 dB)
-62 dBm -62 dBm (±2 dB)
-72 dBm -72 dBm (±2 dB)
-82 dBm -82 dBm (±2 dB)
-92 dBm -92 dBm (±2 dB)
-102 dBm -102 dBm (±3 dB)
-112 dBm -112 dBm (±3 dB)
-120 dBm -120 dBm (±3 dB)
60. Set the FREQ Field to 334.700 MHz.
61. Calibrate the Measuring Receiver for 334.700 MHz in Tuned RF Level Mode with
a 3.8 Special entered.
62. Set the RF LVL Field to the following settings and verify levels on the Measuring
Receiver:
RF LVL LEVEL
-12 dBm -12 dBm (±2.5 dB)
-22 dBm -22 dBm (±2.5 dB)
-32 dBm -32 dBm (±2.5 dB)
-42 dBm -42 dBm (±2 dB)
-52 dBm -52 dBm (±2 dB)
-62 dBm -62 dBm (±2 dB)
-72 dBm -72 dBm (±2 dB)
-82 dBm -82 dBm (±2 dB)
-92 dBm -92 dBm (±2 dB)
-102 dBm -102 dBm (±3 dB)
-112 dBm -112 dBm (±3 dB)
-120 dBm -120 dBm (±3 dB)
63. Disconnect the Measuring Receiver from the RF I/O Connector.

VERIFICATION
IFR 4000
Subject to Export Control, see Cover Page for details. Page 12
Jun 1/11
(5) Harmonic and Spurious
TEST EQUIPMENT: Spectrum Analyzer
VERIFICATION FAILURE: If any step in this procedure fails or is out of tolerance,
this indicates a failure in the Test Set. Refer to the
IFR 4000 Maintenance Manual for corrective action.
STEP PROCEDURE
1. Connect the Spectrum Analyzer (Input) to the ANT Connector.
2. Press the SETUP Key to display the Setup Menu.
3. Set the PORT Field to ANT.
4. Press the MODE Select Key until the VOR Mode Screen is displayed.
5. Set the Test Set as follows:
FIELD SETTING
FREQ 108.000 MHz
RF LVL 0.0 dBm
MOD TONE OFF
M MOD 0%
6. Verify the harmonic is <-20 dBc and the spurious is <-35 dBc.
7. Press the MODE Select Key until the GLIDESLOPE Mode Screen is displayed.
8. Set the Test Set as follows:
FIELD SETTING
FREQ 334.700 MHz
RF LVL 0.0 dBm
M MOD 0%
9. Verify the harmonic is <-20 dBc and the spurious is <-35 dBc.
10. Press the MODE Select Key until the MARKER BEACON Mode Screen is
displayed.
11. Set the Test Set as follows:
FIELD SETTING
FREQ 75.000 MHz
RF LVL 0.0 dBm
MOD TONE OFF
M MOD 0%
12. Verify the harmonic is <-20 dBc and the spurious is <-35 dBc.
13. Press the MODE Select Key until the COMM AM Mode Screen is displayed.
14. Set the Test Set as follows:
FIELD SETTING
FREQ 137.000 MHz
RF LVL 0.0 dBm
MOD TONE OFF
M MOD 0%
15. If the COMM AM Mode Screen is in RECEIVING Mode, press the SWITCH
GEN/RX Soft Key to switch the COMM AM Mode Screen to GENERATING Mode.
16. Verify the harmonic is <-20 dBc and the spurious is <-35 dBc.

VERIFICATION
IFR 4000
Subject to Export Control, see Cover Page for details. Page 13
Jun 1/11
STEP PROCEDURE
17. Set the FREQ Field to 400.000 MHz.
18. Verify the harmonic is <-20 dBc and the spurious is <-35 dBc.
19. Press the SETUP Key to display the Setup Menu.
20. Set the FREQ Field to VAR.
21. Press the SETUP Key to return to the COMM AM Mode Screen.
22. Set the FREQ Field to 10.000 MHz.
23. Verify the spurious is <-32 dBc.
24. Set the FREQ Field to 30.000 MHz.
25. Verify the spurious is <-32 dBc.
26. Disconnect the Spectrum Analyzer from the ANT Connector.

VERIFICATION
IFR 4000
Subject to Export Control, see Cover Page for details. Page 14
Jun 1/11
(6) VSWR (RF I/O and SWR Connectors)
TEST EQUIPMENT: Spectrum Analyzer
VSWR Bridge
VERIFICATION FAILURE: If any step in this procedure fails or is out of tolerance,
this indicates a failure in the Test Set. Refer to the
IFR 4000 Maintenance Manual for corrective action.
STEP PROCEDURE
1. Connect test equipment as shown:
VSWR BRIDGE
SPECTRUM ANALYZER
INPUT
DEVICE UNDER TEST OUTPUT
INPUT
TRACKING
GENERATOR
INPUT
RF I/O
056M-20
RF I/O CONNECTOR
2. Set the Spectrum Analyzer Tracking Generator Level to 0 dBm.
3. Set the Spectrum Analyzer Tracking Generator Frequency to 75, 225 and
400 MHz and record the levels as reference.
4. Connect VSWR Bridge (Device Under Test Connector) to RF I/O Connector.
5. Set the Spectrum Analyzer Tracking Generator Frequency to 75, 225 and
400 MHz and record the levels.
6. Calculate the return loss for the levels recorded in Steps 3 and 5 and record.
(Return Loss = Reference - Reading).
7. Verify VSWR is <1.3 for 75 MHz, <1.3 for 225 MHz and <1.35 for 400 MHz.
Γ= 10 ^ (- RL / 20)
VSWR = (1 + Γ) / (1 - Γ)
Where Γ= Reflection Coefficient
RL = Return Loss
8. Disconnect VSWR Bridge from RF I/O Connector.

VERIFICATION
IFR 4000
Subject to Export Control, see Cover Page for details. Page 15
Jun 1/11
STEP PROCEDURE
SWR CONNECTOR
9. Connect VSWR Bridge (Device Under Test Connector) to SWR Connector.
VSWR BRIDGE
SPECTRUM ANALYZER
INPUT
DEVICE UNDER TEST OUTPUT
INPUT
TRACKING
GENERATOR
INPUT
SWR
056M-21
10. Set the Spectrum Analyzer Tracking Generator Frequency to 75, 225 and
400 MHz and record the levels.
11. Calculate the return loss for the levels recorded in Steps 3 and 10 and record.
(Return Loss = Reference - Reading).
12. Verify VSWR is <1.3 for 75 MHz, <1.3 for 225 MHz and <1.35 for 400 MHz.
Γ= 10 ^ (- RL / 20)
VSWR = (1 + Γ) / (1 - Γ)
Where Γ= Reflection Coefficient
RL = Return Loss
13. Disconnect VSWR Bridge from SWR Connector.

VERIFICATION
IFR 4000
Subject to Export Control, see Cover Page for details. Page 16
Jun 1/11
(7) Marker Beacon
TEST EQUIPMENT: Modulation Analyzer
VERIFICATION FAILURE: If any step in this procedure fails or is out of tolerance,
this indicates a failure in the Test Set. Refer to the
IFR 4000 Maintenance Manual for corrective action.
STEP PROCEDURE
1. Connect the Modulation Analyzer (RF Input) to the ANT Connector.
2. Set the Modulation Analyzer to AM Measurement.
3. Press the SETUP Key to display the Setup Menu.
4. Set the PORT Field to ANT.
5. Press the MODE Select Key until the MARKER BEACON Mode Screen is
displayed.
6. Set the Test Set as follows:
FIELD SETTING
FREQ 75.000 MHz
RF LVL 10.0 dBm
MOD TONE 400 Hz
M MOD CAL
7. Verify 400 Hz (±0.02%) with <2.5% distortion and an AM Depth of 95% AM
(±5% AM) on the Modulation Analyzer.
8. Set the MOD TONE Field to 1300.
9. Verify 1300 Hz (±0.02%) with <2.5% distortion and an AM Depth of 95% AM
(±5% AM) on the Modulation Analyzer.
10. Set the MOD TONE Field to 3000.
11. Verify 3000 Hz (±0.02%) with <2.5% distortion and an AM Depth of 95% AM
(±5% AM) on the Modulation Analyzer.
12. Disconnect the Modulation Analyzer from the ANT Connector.

VERIFICATION
IFR 4000
Subject to Export Control, see Cover Page for details. Page 17
Jun 1/11
(8) VOR
TEST EQUIPMENT: Modulation Analyzer
VERIFICATION FAILURE: If any step in this procedure fails or is out of tolerance,
this indicates a failure in the Test Set. Refer to the
IFR 4000 Maintenance Manual for corrective action.
STEP PROCEDURE
1. Connect the Modulation Analyzer (RF Input) to the ANT Connector.
2. Set the Modulation Analyzer to AM Measurement.
3. Press the SETUP Key to display the Setup Menu.
4. Set the PORT Field to ANT.
MODULATION FREQUENCY, DISTORTION AND DEPTH ACCURACY
5. Press the MODE Select Key until the VOR Mode Screen is displayed.
6. Set the Test Set as follows:
FIELD SETTING
FREQ 108.000 MHz
RF LVL 10.0 dBm
MOD TONE 1020 Hz
M MOD CAL
30 Hz MOD 0%
9960 Hz MOD 0%
7. Verify 1020 Hz (±0.02%) with <2.0% distortion and an AM Depth of 30% AM
(±2% AM) on the Modulation Analyzer.
8. Set the Test Set as follows:
FIELD SETTING
MOD TONE OFF
30 Hz MOD 30%
9. Verify 30 Hz (±0.02%) with <2.0% distortion and an AM Depth of 30% AM
(±1% AM) on the Modulation Analyzer.
10. Set the Test Set as follows:
FIELD SETTING
30 Hz MOD 0%
9960 Hz MOD 30%
TONE DEL REF
11. Verify 9960 Hz (±0.02%) with <2.0% distortion and an AM Depth of 30% AM
(±1% AM) on the Modulation Analyzer.
12. Set the Test Set as follows:
FIELD SETTING
30 Hz MOD 30%
TONE DEL -
13. Verify AM Depth of 60% AM (±2% AM) on the Modulation Analyzer.

VERIFICATION
IFR 4000
Subject to Export Control, see Cover Page for details. Page 18
Jun 1/11
STEP PROCEDURE
FM DEVIATION ACCURACY
14. Set the Modulation Analyzer to DEV 9.96K.
15. Verify 480 Hz (±25 Hz) on the Modulation Analyzer.
BEARING ACCURACY
16. Set the Modulation Analyzer to Phase Measurement.
17. Press the SETUP Key to display the Setup Menu.
18. Set the VOR BRG Field to FIXED.
19. Press the MODE Select Key until the VOR Mode Screen is displayed.
20. Set the Test Set as follows:
FIELD SETTING
30 Hz MOD 30%
9960 Hz MOD 30%
TO/FROM TO
21. Set the BRG Field to the following settings and verify readings on the
Modulation Analyzer:
BRG READING
30 210°(±0.1°)
90 270°(±0.1°)
150 330°(±0.1°)
210 30°(±0.1°)
270 90°(±0.1°)
330 150°(±0.1°)
22. Set the TO/FROM Field to FROM.
23. Set the BRG Field to the following settings and verify readings on the
Modulation Analyzer:
BRG READING
30 30°(±0.1°)
90 90°(±0.1°)
150 150°(±0.1°)
210 210°(±0.1°)
270 270°(±0.1°)
330 330°(±0.1°)
24. Press the SETUP Key to display the Setup Menu.
25. Set the VOR BRG Field to VAR.
26. Press the MODE Select Key until the VOR Mode Screen is displayed.

VERIFICATION
IFR 4000
Subject to Export Control, see Cover Page for details. Page 19
Jun 1/11
STEP PROCEDURE
27. Set the BRG Field to the following settings and verify readings on the
Modulation Analyzer:
BRG READING
1 1°(±0.1°)
2 2°(±0.1°)
10.1 10.1°(±0.1°)
10.2 10.2°(±0.1°)
28. Disconnect the Modulation Analyzer from the ANT Connector.

VERIFICATION
IFR 4000
Subject to Export Control, see Cover Page for details. Page 20
Jun 1/11
(9) Localizer
TEST EQUIPMENT: Modulation Analyzer
VERIFICATION FAILURE: If any step in this procedure fails or is out of tolerance,
this indicates a failure in the Test Set. Refer to the
IFR 4000 Maintenance Manual for corrective action.
STEP PROCEDURE
1. Connect the Modulation Analyzer (RF Input) to the ANT Connector.
2. Set the Modulation Analyzer to AM Measurement.
3. Press the SETUP Key to display the Setup Menu.
4. Set the PORT Field to ANT.
MODULATION FREQUENCY, DISTORTION AND DEPTH ACCURACY
5. Press the MODE Select Key until the LOCALIZER Mode Screen is displayed.
6. Set the Test Set as follows:
FIELD SETTING
FREQ 108.100 MHz
RF LVL 10.0 dBm
MOD TONE 1020 Hz
M MOD CAL
DEV STEP FIXED
LOC DDM 0.000 CENTER
TONE DEL 90 & 150
7. Verify 1020 Hz (±0.02%) with <2.5% distortion and an AM Depth of 30% AM
(±2% AM) on the Modulation Analyzer.
8. Set the Test Set as follows:
FIELD SETTING
MOD TONE OFF
TONE DEL 150
9. Verify 90 Hz (±0.02%) with <2.5% distortion and an AM Depth of 20% AM
(±2% AM) on the Modulation Analyzer.
10. Set the TONE DEL Field to 90.
11. Verify 150 Hz (±0.02%) with <2.5% distortion and an AM Depth of 20% AM
(±2% AM) on the Modulation Analyzer.
DDM ACCURACY
12. Set the Modulation Analyzer to DDM.
13. Set the Test Set as follows:
FIELD SETTING
TONE DEL OFF
90/150 Hz OFF