Agilent Technologies 3A Manual do Utilizador Página 23

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2-9
Operation
To Compensate for Module Insertion Loss
To Compensate for Module Insertion Loss
The following steps allow you to enter an offset to compensate for the inser-
tion loss of the clock recovery module. This provides accurate amplitude mea-
surements at the input to the clock recovery module.
1
Disconnect the cable from the clock recovery module’s
Input
connector.
2
Measure the signal using a power meter. You can use either the
Agilent 83480A’s built-in power meter or an external power meter.
3
Reconnect the cable to the clock recovery module.
4
Disconnect the cable from the reference receiver module’s input connector.
5
Measure the signal using a power meter. You can use either the
Agilent 83480A’s built-in power meter or an external power meter.
6
Subtract the two measurements to determine the insertion loss of the module.
Insertion loss:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ____________
7
On the
reference receiver module
, press the front-panel channel
SETUP
key.
8
Press
External scale
, and set the
Atten units
to “decibel”.
9
Press
Attenuation
, and enter the value calculated in Step 6.
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