ii
3.5
Switching considerations ..................................................................................................................................... 3-2
3.5.1
Card characteristics.................................................................................................................................... 3-2
3.5.2
Cable characteristics .................................................................................................................................. 3-3
3.6
Applications......................................................................................................................................................... 3-3
3.6.1
Multiplexer expansion ............................................................................................................................... 3-3
3.6.2
Filter testing ............................................................................................................................................... 3-4
3.6.3
Impedance testing ...................................................................................................................................... 3-6
4
Service Information
4.1
Introduction ......................................................................................................................................................... 4-1
4.2
Handling and cleaning precautions...................................................................................................................... 4-1
4.2.1
Handling precautions ................................................................................................................................. 4-1
4.2.2
Soldering considerations............................................................................................................................ 4-1
4.3
Performance verification ..................................................................................................................................... 4-1
4.3.1
Environmental conditions .......................................................................................................................... 4-2
4.3.2
Recommended verification equipment ...................................................................................................... 4-2
4.3.3
Insertion loss tests...................................................................................................................................... 4-2
4.3.4
Isolation tests ............................................................................................................................................. 4-3
4.3.5
Special handling of static-sensitive devices .............................................................................................. 4-7
4.4
Principles of operation ......................................................................................................................................... 4-7
4.4.1
Block diagram............................................................................................................................................ 4-7
4.4.2
Relay control.............................................................................................................................................. 4-8
4.4.3
Switching circuits ...................................................................................................................................... 4-8
4.4.4
Card configuration memory....................................................................................................................... 4-8
4.5
Troubleshooting ................................................................................................................................................... 4-8
4.5.1
Troubleshooting equipment ....................................................................................................................... 4-8
4.5.2
Troubleshooting procedure ........................................................................................................................ 4-8
5
Replaceable Parts
5.1
Introduction ......................................................................................................................................................... 5-1
5.2
Parts list ............................................................................................................................................................... 5-1
5.3
Ordering information ........................................................................................................................................... 5-1
5.4
Factory service..................................................................................................................................................... 5-1
5.5
Component layout and schematic diagram.......................................................................................................... 5-1