Performance Tests
Performance Test 3
3-33
VSWR Test – 50
Ω
Leveling Head (Optional 96040A and 96270A)
Equipment required for this test:
• Signal Source, 50 Ω output
• Spectrum Analyzer
• 50 Ω directional bridge
• Precision 50 Ω Open/Short termination
• 50 Ω Leveling Head (supplied with UUT)
To verify the UUT’s Leveling Head output VSWR using a directional bridge and a
Spectrum Analyzer:
1. Connect the REF FREQUENCY OUTPUT (rear panel) from the UUT to the
Spectrum Analyzer and signal generator external reference inputs using a
BNC tee and BNC male – male cable assemblies. Set the Spectrum Analyzer
and signal generator for external frequency reference. See Figure 3-9.
9610A/AF
REFERENCE SOURCE
10V
PK
MAX
RF
COMMON
96xx
HEAD INTERFACE
RF OUTPUT
CONTROL
CONNECT
96xx HEAD
ONLY
STBY
NEXT
CHAR
6
9
5
8
4
77
32
1
-
-
0
.
SPACEEXP
BKSP
ALPHA
LOCKLOCK
DEF
MNO
ABC
JKL
/ /
GHI
WXYZTUV
PQRS
ENTER
SINE
MOD
SWEEP
UNITS
SETUP
OPER
50 Leveling
Head
50 Leveling
Head
Instrument (UUT)
Signal Source
RF Input
Input Port
Test Port
Open
Short
50 Directional Bridge
Spectrum Analyzer
Connect the Signal Source
and Spectrum Ananlyzer
Frequency Reference Inputs
to the UUT Reference Output
hpn226.eps
Figure 3-9. Equipment Connections - 50 Ω Leveling Head VSWR Test (96040A and 96270A)
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