Bypass Path; Input; Attenuation; Gain - Agilent Technologies N9039A Service Manual

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Service and Diagnostics Menus
Service Key Descriptions

Bypass Path

Allows the service technician to select the bypass path for troubleshooting
purposes.
This will bypass the filter boards entirely, routing the input signal through the RF
switch assembly only. The Attenuation, Gain, and Center Freq settings, as well as
the previously selected filter path, will have no affect on the input signal when the
Bypass Path is selected.

Input

Allows the service technician to select between either the standard RF Input or the
Source Input for troubleshooting purposes.
The input can be selected when going through either an RF Filter Path or the

Bypass Path

Attenuation

Allows the service technician to select the attenuation level being used for
troubleshooting purposes.
There are two different attenuators in the instrument; one in the Conducted Filter
Path and one in the Radiated Filter Path. When the attenuation level is adjusted by
the user it will only change the attenuator for the path currently being used. If you
were then to switch to a band that uses the other attenuator it will be synchronized
to the currently displayed attenuation level before the path is switched.
This setting will have no affect on the signal level when the Bypass Path is being
used.

Gain

Allows the service technician to select to use the internal fixed gain amplifier or
not for troubleshooting purposes.
There are two different amplifiers in the instrument; one in the Conducted Filter
Path and one in the Radiated Filter Path. When the gain is turned on or off by the
user it will only change the state of the amplifier in the path currently being used.
If you were then to switch to a band that uses the other amplifier it will be
synchronized to the currently displayed gain state before the path is switched.
This setting will have no affect on the signal level when the Bypass Path is being
used.
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Chapter 5

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