9640A
Instruction Manual
5-32
VSWR Test – 50
Ω
(Optional)
Equipment required for this test:
•
Signal Generator, 50
Ω
output
•
Spectrum Analyzer
•
50
Ω
directional bridge
•
Precision 50
Ω
Open/Short termination
•
50
Ω
Leveling Head (supplied with UUT)
Use the following test to verify the UUT’s 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 5-8.
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
7
7
3
2
1
-
-
0
.
SPACE
EXP
BKSP
ALPHA
LOCK
LOCK
DEF
MNO
ABC
JKL
/
/
GHI
WXYZ
TUV
PQRS
ENTER
SINE
MOD
SWEEP
UNITS
SETUP
OPER
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
7
7
3
2
1
-
-
0
.
SPACE
EXP
BKSP
ALPHA
LOCK
LOCK
DEF
MNO
ABC
JKL
/
/
GHI
WXYZ
TUV
PQRS
ENTER
SINE
MOD
SWEEP
UNITS
SETUP
OPER
50 Leveling
Head
50 Leveling
Head
Instrument (UUT)
Signal Generator
RF Input
Input Port
Test Port
Open
Short
50 Directional Bridge
Spectrum Analyzer
Connect the Signal Generator
and Spectrum Ananlyzer
Frequency Reference Inputs
to the UUT Reference Output
ead226f.eps
Figure 5-8. Equipment Connections - VSWR Test (50
Ω
)
2.
On the UUT enable the REF FREQUENCY OUTPUT at 10MHz. Ensure the
spectrum analyzer and signal generator external reference frequency inputs are
enabled for input at 10 MHz.
3.
Connect the signal generator RF output to the input port of the directional bridge.
Connect the directional bridge coupled (output) port to the spectrum analyzer input.
Note
In order to determine the reference level setting of the spectrum analyzer,
the UUT must initially be connected to the directional bridge.
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