Keysight VXI Bus 75000 C Series, Service Manual

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Keysight E1463A 32-Channel Form C Switch Service Guide 25
Performance Verification Verification Tests
Test 2-1: Closed Channel Resistance Test
This test verifies that all relay contacts meet the closed-channel resistance
specification for the module. When making the Closed Channel Resistance Test,
the NO and NC paths relay contacts are tested independently. This test uses the
test fixture (see Figure 2-1).
The Closed Channel resistance specification for each relay contact is 2.0 W.
Common to NO Measurements
1 Make Hardware Connections
– Turn mainframe power OFF
– Connect DMM leads as shown in Figure 2-2
– Set DMM to measure 4-wire Ohms
– Turn mainframe power ON
2 Measure Channel 0 C to NO Resistance
– Send *RST to Module
– Send CLOS (@nn00) to close channel 0, where nn = card # (typically 01)
– Trigger the DMM with TRIG SGL and note reading
– Send OPEN (@nn00) to open channel 0, where nn = card # (typically 01)
– Enter the result in Table 2-1 for channel 0 C to NO
3
Repeat for Channels 1 through 31 C to NO
– Repeat step 2 for channels 1 through 31
– Use OPEN (@nncc) and CLOS (@nncc), where nn = card # and cc =
channel # (omit leading zeroes in nn)