MAINTENANCE MANUAL
IFR 4000
2-2-3
Page 20
Aug 1/04
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.
Summary of Contents for IFR 4000
Page 1: ...NAV COMM Test Set Maintenance Manual 1002 5600 4P0 IFR 4000...
Page 3: ...MAINTENANCE MANUAL IFR 4000 FOR QUALIFIED SERVICE PERSONNEL ONLY...
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