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8163A/B, 8164A/B, 8166A/B User's Guide
•
To zero all the powermeters hosted by the same mainframe as the
Attenuator module (including the Attenuator module and, for example,
the powermeter incorporated in a return loss module), press [Menu] ,
then select <Zero All>.
•
To set the measurement Averaging Time used by the powermeter
incorporated in the Attenuator module, press [Menu] , select
<Averaging Time>, press [OK], select your preferred Averaging Time,
press [OK], then press [Close].
•
As with any powermeter, a longer Averaging Time increases accuracy
and noise rejection, but increases response time.
Calibration Procedure
The power level measured by the integrated powermeter at the output of
the module is displayed as P
P
to calibrate for the patchcord and connector losses that occur
Offset
between the Attenuator module output and the DUT input.
After calibration, you edit the Attenuator's P
absolute power applied to the DUT.
1
Disconnect the DUT input in your test setup and connect it to your
reference powermeter.
•
Set the
wavelength or, for a multi-wavelength DWDM signal, the effective
wavelength
Refer to
•
Set an appropriate measurement <Averaging Time>.
2
Display the details screen for the Attenuator module.
•
Make sure the
the source wavelength or, for a multi-wavelength DWDM signal,
λ
effective
•
Make sure that the Averaging Time set for the integrated
powermeter matches that set for the reference powermeter.
3
If the reference powermeter is hosted by the same mainframe as the
Attenuator module:
•
Select the P
•
Press the [PM-> Off ] softkey,
•
Select the channel used to host your reference powermeter,
•
Press [OK].
Setting Attenuation and/or Power Levels
. To calibrate your test setup, you apply a
actual
λ
parameter for the reference powermeter to the source
λ
effective
Multi-wavelength DWDM signals
λ
parameter set for the Attenuator module matches
.
field,
Offset
parameter to control the
SET
on page 224.
8
227
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