Agilent Technologies 8719ET Service Manual page 35

8719ET/20ET/22ET
8719ES/20ES/22ES
RF Network Analyzers
Figure 2-5 Typical Cable Magnitude and Phase Stability Response
Cable Connector Repeatability
1. Keep the test port cable connected to PORT 1 (REFLECTION port on ET models).
2. To measure the cable connector repeatability, connect a broadband termination to the
end of the cable.
3. Press the following:
Chan 1 Display
DUAL | QUAD SETUP
Display
DISPLAY: DATA
AVERAGING FACTOR
Avg
Wait until the analyzer has averaged the measurement 128 times by observing the
counter on the left side of the display.
4. To normalize the data trace press the following:
DATA → MEMORY
Display
REFERENCE VALUE
Scale Ref
SCALE/DIV 20
5. Disconnect and then reconnect the cable to the test port. Tighten the connection to the
specified torque for the connector type. Look at the trace for spikes or modes.
6. To re-normalize the data trace of the reconnected cable press the following:
DATA → MEMORY
Display
Service Guide
DUAL CHANNEL OFF
128 x1
DATA−MEM
−50
x1
System Verification and Performance Tests
AVERAGING ON
x1
Preliminary Tests
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