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Using the Attenuator
Setting Up the Hardware
2.1 Setting Up the Hardware
To use the attenuator, you need to set up the hardware as shown in
the figure below.
Figure 2-1 The Hardware Configuration for the Attenuator
NOTE Before using the instrument, you should make sure that it is properly
warmed up. The instrument is properly warmed up when it has been
switched on for a minimum of 45 minutes. Failure to do this can cause
errors of up to 0.04dB in the attenuation.
The connector interface you need depends on the connector type
you are using (see “Connector Interfaces and Other Accessories”
on page 158).
If you have option 121 or option 221, then the Monitor Output
provides a signal for monitoring the power getting through the
attenuator. The signal level is approximately 5% of the output
power level. For the most accurate results, you should measure the
coupling ratio, and its wavelength dependence, for the Monitor
Output yourself.