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5. On the analyzer, press
FUNC ION
MEAS
5
keys or the knob to move REF POSN one line down from the top of the CR
graticule.
6. On the analyzer, press FUNC ION
Calibrating the Scalar Network nalyzer
7. On the analyzer, press FUNC ION
(prompts) appearing on the CR :
a. Connect the short to the ES POR of the directional bridge, then press
on the analyzer. Remove the short.
TORE HORT
b. Connect the open to the ES POR of the directional bridge, then press
on the analyzer. Remove the open.
TORE OPEN
he CR will display
8. Press FUNC ION
DISPLAY
9. Connect the detector to be tested to the ES POR of the directional
bridge. On the analyzer, press FUNC ION
front panel knob to read the highest value (worst case return loss).
Record the worst case value in the space provided on the
Record
, located at the end of this chapter.
Return Loss from 40 MHz to 18 GHz (to 26.5 GHz for 85025B/E
only, to 50 GHz for 85025D only)
10. On the source, reset the S AR /S OP frequencies by pressing
. Next, for an 85025A detector, press
MHz
5
detector, press
26.5
5
11. On the analyzer, ensure FUNC ION
the detector.
12. It will be necessary to recalibrate the analyzer, since a new range of
frequencies has been selected for measurement. Repeat the steps in the
section titled \Calibrating the Measurement System."
Ag lent 85025A/B/D/E
to switch channel 2 OFF. Press
CHAN 2 OFF
. Press FUNC ION
A
RE
SCALE
5
HORT/OPEN
CAL
5
HORT/OPEN CAL AVED IN CH1 MEM
.
MEA -MEM
5
, or for an 85025D detector, press
GHz
5
MEA POWER A
, then use the step
REF PO N
5
.
AUTO CALE
. Follow the directions
.
and turn the analyzer's
CURSOR
5
Performance Test
START
, for an 85025B/E
STOP
18
GHz
5
5
5
50
GHz
5
is still active. Remove
Performance T ests
40
5
5
.
5
4-7
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