Routes Rf Signal To A24 Conducted Filter Bd Assy; Rf Gain; Step Attenuation - Agilent Technologies N9039A Service Manual

Routes RF Signal to A24 Conducted Filter Bd Assy

When in "Filtered" mode the A23 Conducted Input Board Assembly receives its
input from A21 Radiated Input Board Assembly. The A23 Conducted Input Board
Assembly then routes RF signals below 30 MHz to the A24 Conducted Filter
Board Assembly. The A23 Conducted Input Board Assembly also routes filtered
RF Output signals back to the A21 Radiated Input Board Assembly.
Refer to Figure 2-18 and
Connector Name Signal Description
A23-J3 Filtered RF Output Signal
A23-J4 Unfiltered RF Input Signal
A23-J5 Unfiltered Conducted Signal Output
A23-J6 Filtered Conducted Signal Input

RF Gain

The A23 Conducted Input Board Assembly provides 15 dB of step gain for filtered
signals below 30 MHz. The step gain may be turned on and off in the service
menu.
A23 Conducted Input Board Assembly also provides some additional variable gain
to compensate for the loss of the RF signal path. If the instrument has a variable
gain problem it may be corrected by running the instrument adjustments.

Step Attenuation

The A23 Conducted Input Board Assembly provides step attenuation for filtered
signals below 30 MHz. The step gain may be set to 0 dB and 10 dB and then from
12.5 dB to 57.5 dB in 2.5 dB steps. The step gain may be set in the service menu.
Chapter 2
A23 Conducted Input Board Assembly Troubleshooting
Figure 2-19 for connector locations.
Troubleshooting
83