HP 4935A, Руководство по эксплуатации и обслуживанию

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Model
Adjustment/Calibration
SECTION V
ADJUSTMENT/CALIBRATION
5-1. INTRODUCTION
This section contains adjustment and calibration information for the HP Model 4935A
Transmission Test Set. Verify all adjustments and calibrations with the tests in Section IV, Performance
Tests.
5-3. SAFETY CONSIDERATIONS
I warnings and cautions must be followed for your protection and to avoid damage to the
Whenever internal instrument circuits are exposed, caution must exercised. When using AC
equipment, the test equipment chassis should be connected to earth ground. With the in
(standby) power is still applied to instrument and some voltages are still present. To
completely power down the instrument, disconnect it from the AC power source. For instruments with the
002 and disconnect the three batteries and the AC power source.
Power switch does not turn off AC power and some power circuits.
5-5.
EQUIPMENT REQUIRED
Test equipment needed for adjustments is listed in Table 1-2. Test equipment with equivalent
specifications may be substituted.
5-7. Instrument Access
(see warning of paragraph 5-4)
instrument’s internal circuits and assemblies are accessed by removing the case top. The case
top is secured by four screws located on the bottom of the instrument. For the complete procedure refer to the
Mechanical Disassembly Procedure in Section VIII, Service Section.
When the is in AC power is still present in the instrument as well as some
voltages. Disconnect AC power from the instrument before opening the case or
removing any assemblies.
5-9. ADJUSTMENT LOCATIONS
Adjustment locations are shown on the component locaters at the end of Section VIII.
5-1