Agilent Technologies 8935 Series Especificações descarregar pdf (Página 96)

Chapter 4 95

Preventative Maintenance

Hardware Maintenance

• Real Time Clock

The Test Set operates with a real-time clock that is user set. The

real-time clock consists of both a numerical date and a time-of-day

setting which may require changing due to repair (such as a battery

or hardware repair) or shipping to a different time zone. The clock

and date should be checked as part of routine maintenance. Incorrect

settings may be an indication of faulty battery backup.

The date and time settings are entered by using the INSTRUMENT

CONFIGURE screen. The Date field is a numerical number using

the MMDDYY format. The Time field is a numerical number using a

24-hour military standard (example: 3:00 pm is 15.00 in military

time). The date and time are maintained as part of RAM memory

with battery backup.

Cleaning

• The Test Set contains an internal air filter. The filter requires

periodic cleaning to remove dust and debris. Refer to “Cleaning the

Air Filter” on page 97.

• RF assemblies A2A20 through A2A25 (see Figure 5-8 on page 113)

should be removed and the bottom edges of the metal case cleaned

with isopropyl alcohol or a mild cleaner. Cleaning the metal edges

will insure that RF leakage protection is maintained.

Functionality

The Test Set has the capability to perform self tests for hardware

failure and functionality. The self test diagnostics should be run

whenever preventive maintenance, calibration, or repair has been

performed. Self test diagnostics will help to insure that the instrument

is performing reliably.

There are three diagnostic routines located in ROM of the Test Set:

Functional Diagnostics, AF Diagnostics, and RF Diagnostics. Run these

programs and follow the instructions listed on the screen. For

instructions on running these diagnostics routines, see “Accessing the

Diagnostic Tests” on page 62.

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Agilent Technologies 8935 Series Especificações Página 96