A23 - Conducted Input Board Assembly - Agilent Technologies N9039A Service Manual

A23 - Conducted Input Board Assembly

The A23 Conducted Input Board Assembly is serviced as an assembly only; no
component level repair is supported.
The A23 Conducted Input Board Assembly functions in a frequency range of 9
kHz to 30 MHz and has input filters to provide a clean input signal to the A24
Conducted Filter Board Assembly.
Refer to Figure 3-3 and
contains 5 I/O ports.
Connector Description
J8 Switch Control output
J3 RF Main input
J4 RF Main output
J5 RF Conducted output
J6 RF Conducted input
When the conducted filter path is selected, the A21 Radiated Input Board
Assembly passes the input RF signal through to the A23 Conducted Input Board
Assembly where it is then routed to the A24 Conducted Filter Assembly. Then the
filtered RF signal is routed back to the A23 Conducted Input Board Assembly and
then to the A21 Radiated Input Board Assembly.
In addition, the A23 Conducted Input Board Assembly also provides the following
functions for the conducted path:
• Variable gain amplifier
• 15 dB step gain amplifier
• Generates the Switching Control Signals for SW1 & SW2 Relay Switches
• Thermistor to protect against power surges
• Limiter to protect against over voltage conditions
• Step attenuator to protect against Overload
• Overload detector to warn the user if an overload condition exists
• Digital temperature sensor to monitor internal temperature changes
Chapter 3
A23 - Conducted Input Board Assembly
Figure 3-4. A23 Conducted Input Board Assembly
Connects To
SW1 & SW2 Switch Assembly
A21 Radiated Input Assembly
A21 Radiated Input Assembly
A24 Conducted Filter Assembly
A24 Conducted Filter Assembly
Assembly Descriptions
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