Agilent Technologies 85032B/E 50 Dokumentacja Strona 148

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Troubleshooting and Block Diagrams 8712ET/ES and 8714ET/ES
Introduction RF Network Analyzers
4-6 Service Guide
Press (see the caution on page 4-2). The display should show a flat line about
0 dB. If it does not, ensure that the cable connecting the RF OUT/PORT 1 port to the
RF IN/PORT 2 port is good and securely connected.
If the analyzer will not switch on, check the AC line power. Make sure that the line voltage
selector switch (located below the AC power plug) is set correctly. Check the fuse.
If the analyzer does not go through the steps above, or if any error messages appear, or if
the problem persists, refer to “Category 1 Failures: Dead or No Display” on page 4-7.
NOTE If any error is generated during the power-up sequence, the analyzer will halt
after displaying the error message. At this point, if you press any key on the
analyzer, it will attempt to resume operation. However, erroneous or unstable
operation may result. The option of ignoring the error message is provided
only as a troubleshooting aid.
Operator's Check
Perform the operator's check procedure as described in Chapter 1. It is a simple test of the
analyzer's measurement capability. If the test passes and peripherals are not involved,
duplicate the operating conditions under which the system failed and refer to the
appropriate section in this chapter if the problem reoccurs.
PRESET
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