Agilent Technologies 11898A, Руководство пользователя

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The Agilent 11898A—At a Glance
The Agilent 11898A—At a Glance
The Agilent 11898A module extender is an accessory for the Agilent 83480A
Digital Communications Analyzer and the Agilent 54750A Digital Oscilloscope
mainframes. The module extender makes it possible for plug-in modules to be
operated remotely from the mainframe.
Using the module extender can improve mea-
surement accuracy by enabling the module’s
connectors to be positioned near the device
under test. This reduces the need for long
cables, which are cumbersome and can intro-
duce losses. This is particularly true when mea-
suring extremely high-speed electrical signals. In
these cases, locating the signal input in close
proximity to the signal source increases accu-
racy and reduces the measurements artifacts
caused by cables. If it is impractical to relocate
the device under test to the front panel of the
mainframe, the module extender provides an
alternative method of minimizing cables.
The extender also makes it easy to test a device that must be isolated from
vibration on an optical bench.
Measurement
Accuracy To ensure that you obtain the specified accuracy for the module you are using
with the extender, you must perform a plug-in module vertical calibration
after the module has been connected to the extender. The calibration must
also be performed when you move a module extender or plug-in module from
one slot to another, or from one mainframe to another. Refer to “Step 4. Per-
form Calibrations” on page 1-8 for information on performing a plug-in module
vertical calibration.
C A U T I O N
The plug-in module input circuitry can be damaged when the total input power
levels 10 dBm (10 mW) on the optical channel or ±2 V + peak ac
(+16 dBm) on the electrical channel. To prevent input damage, this specified
level must not be exceeded.