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A21 - Radiated Input Board Assembly
The A21 Radiated Input Board Assembly is serviced as an assembly only; no
component level repair is supported.
The A21 Radiated Input Board Assembly functions in a frequency range of 30
MHz to 1 GHz and has a 30 MHz High Pass Filter to provide a clean input signal
to the A22 Radiated Filter Board Assembly.
Refer to
Figure 3-3
and
6 I/O ports.
Connector
Description
J3
RF Main output
J4
RF Conducted output
J5
RF Radiated output
J6
RF Radiated input
J7
RF Conducted input
J8
RF Main input
The assembly consists of two pin switches for selecting either the conducted or
radiated filter paths.
• If the Conducted filter path is selected, pin switches on the A21 - Radiated
Input Board Assembly pass the input RF signal though to the A23 - Conducted
Input Board Assembly. Then additional pin switches on the A21 - Radiated
Input Board Assembly pass the filtered RF signal through from the A23 -
Conducted Input Board Assembly to the instrument output.
• If the Radiated filter path is selected, pin switches on the A21 - Radiated Input
Board Assembly route the input RF signal from the RF Main Input connector to
the A22 - Radiated Filter Board Assembly from the RF Radiated Output
connector. Then additional pin switches route the filtered RF signal from the
A23 - Conducted Input Board Assembly from the RF Radiated Input connector
to the Main RF Output Connector.
Chapter 3
A21 - Radiated Input Board Assembly
Figure
3-4. A21 Radiated Input Board Assembly contains
Connects To
SW2 Switch Assembly
A23 Conducted Input Assembly
A22 Radiated Filter Assembly
A22 Radiated Filter Assembly
A23 Conducted Input Assembly
SW2 Switch Assembly
Assembly Descriptions
107
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Troubleshooting
