HP 8753ES, Инструкция по установке и быстрому запуску

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Chapter 2 2-25
Quick Start: Learning How to Make Measurements
If You Encounter a Problem
No RF Output
If there is no RF signal at either PORT 1 or PORT 2 connector:
This procedure only applies if a test set is being used.
❏
Verify proper connection of the test set interconnect cable and the RF cables between
the analyzer and the test set (especially RF OUT on the analyzer to RF IN on the test
set, and R on the analyzer to R on the test set).
❏
Check that the signal at the test port is switched on.
• Press and verify that is toggled to OFF.
NOTE
On S-parameter test sets, it is possible to set the source power to come from
PORT 2 instead of PORT 1, so you must check the power at the correct port.
With factory preset, the power comes from PORT 1.
❏
If you are applying external modulation (AM) to the analyzer, check the external
modulating signal or external gate/trigger signals for problems.
CAUTION
If the error message:
CAUTION: OVERLOAD ON INPUT X, POWER REDUCED
appears on the analyzer display, too much source power is being applied at
the input. In such a case, the input power will need to be reduced before the
source power will remain on.
❏
If phase-lock error messages appear on the analyzer display, check that the front panel
jumper is secure on the R CHANNEL connectors. If the jumper is secure and the error
messages still appear, contact your nearest Hewlett-Packard office for service. A list of
Hewlett-Packard sales and service offices is provided in
Table 2-1 on page 2-26 .
NOTE
The analyzer must have a connection from the source output to the analyzer
“R” input. The power at the “R” channel must be between 0 dBm and
−
30 dBm. If the “R” channel is not connected, a “
NO IF FOUND
” message will
appear.
Power
POWER TRIP