Series 3700A Switch and Control Cards Reference Manual
Section 11: Model 3732 quad 4x28 reed relay matrix card
3700AS-909-01 Rev. A / Preliminary
11-49
Cross-card expansion examples
The following examples describe cross-card expansion using the Model 3706A with two Model 3732
cards installed in slots 1 and 2.
Example 1: Configure an expanded 4x224 1-pole matrix
1. Configure both Model 3732 cards as single 4x112 matrices.
2. Close backplane relays 10911, 10912, 20911, and 20912 to interconnect the rows on the two
cards.
Example 2: Configure an expanded 12x56 1-pole matrix
1. Configure both Model 3732 cards as single 16x28 matrices.
2. Close backplane relays 10911, 10912, 10913, 10914, 10915, 10916, 20911, 20912, 20913,
20914, 20915, and 20916.
NOTE
Because the backplane has 12 signal paths in this configuration, relay bank 3 is not used on either
Model 3732 card. Because relay bank 3 shares the same backplane connections as relay bank 1,
relay bank 3 cannot be used in this configuration. With all backplane relays closed, relay bank 1 is in
parallel with relay bank 3, requiring all relays in bank 3 to be left open in this configuration.
Example 3: Configure an expanded 4x112 2-pole matrix
1. Configure both Model 3732 cards as single 4x56 2-pole matrices.
2. Close backplane relays 10913, 10914, 10915, 10916, 20913, 20914, 20915, and 20916.
Using the Model 3732 with a digital multimeter
There are two main connection options for using the Model 3732 with the Model 3706A digital
multimeter (DMM):
•
Use external wiring to connect Model 3732 rows to the Model 3706A DMM terminals in the 15-pin
rear panel analog backplane connector.
•
Connect to the Model 3706A DMM through the Model 3706A backplane by programmatically
closing the appropriate backplane relays.
External wiring connection method
The recommended approach is to make external connections between the rows of the Model 3732
and the 15-pin analog backplane connector on the Model 3706A rear panel. This allows you to make
most efficient use of all crosspoints on the Model 3732, and allows automatic channel pairing on the
Model 3706A for 2-pole mode.
External wiring example
For this example, assume that a Model 3732 card is in installed in slot 1 of the Model 3706A, and has
been configured using the jumpers on the ID pins to be a quad 4x28 matrix. The Model 3732 card is
then configured by software to be a dual 4x28 matrix in 2-pole mode on all channels. In this
configuration, closing channel 11101 will also automatically close channel 12101, and closing channel
13102 will automatically close channel 14102.