Fluke 9640A Series, Instruction Manual

Page: 239 / 324

Calibration
Performance Test
5
5-49
10. Set the spectrum analyzer display units to volts and perform a peak search. Note the
marker indication with the test port open.
11. Connect a Type-N short to the directional bridge test port. Perform a peak search
with the test port shorted and note the marker indication. Remove the short.
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
Instrument (UUT)
Signal Generator
RF Input
Spectrum Analyzer
Open
Short
75

Directional Bridge
Input Port
Test Port
Connect the Signal Generator
and Spectrum Ananlyzer
Frequency Reference Inputs
to the UUT Reference Output
75

Leveling
Head
75

Leveling
Head
75

to 50

Impedance
Matching Pad
ead227f.eps
Figure 5-13. Equipment Connections - VSWR Test (75
Ω
)
12. Compute the average of the values measured with the test port open and shorted.
Record this number as Z
Max
for the test frequency of 500 MHz.
13. Repeat steps 6 through 12 for the next test frequency at +7 dBm listed in Table 5-23,
setting the spectrum analyzer center frequency to the test frequency and recording
Z
Max
for each test frequency.
14. Reconnect the directional bridge test port to the UUT and set it to
OPER
.
15. Set the spectrum analyzer display to linear. Set the sweep time to 5 ms, single sweep.
16. Set the UUT frequency to 500 MHz, set the signal generator frequency to 500.00001
MHz, and set the spectrum analyzer center frequency to 500 MHz.