HP 8590 E-Series, Руководство по калибровке

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1. 10 MHz Reference Output A ccuracy ,
HP 8590 EM-Series
If your instrument is equipped with a Precision Frequency Reference , perform
\10 MHz Precision Frequency Reference Output A ccuracy ," instead.
This performance verication test must be performed with the EMC analyzer set
in the spectrum analyzer mode.
The settability is measured by changing the setting of the digital-to-analog
converter (D A C) which controls the frequency of the timebase . The frequency
dierence per D A C step is calculated and compared to the specication.
The related adjustment for this performance verication test is the \10 MHz
Reference , HP 8590 EM-Series".
Equipment Required
Microwave frequency counter
Frequency standard
Cable , BNC, 122 cm (48 in) (2 required)
Figure 2-1. 10 MHz Reference Output A ccuracy T est Setup
Procedure
The test results will be invalid if REF UNLK is displayed at any time during this
test. REF UNLK will be displayed if the internal reference oscillator is unlocked
from the 10 MHz reference . A REF UNLK might occur if there is a hardware
failure or if the jumper between 10 MHz REF OUTPUT and EXT REF IN on the
rear panel is removed.
2-2 P erformance V erication T ests