1 Overview of the 34934A
24 Keysight 34934A User’s Guide
“Channel Numbering” on page 228 provides the algorithm for how these
channel numbers were computed.
– The syntax for the SCPI command used to close the circuit path, with the
appropriate channel numbers.
In most of the examples, all test instruments and DUTs are connected to the
columns, while the rows are used as busses to route signals between the
components. For applications requiring protection from high in-rush currents, you
may also connect your instruments or DUTs to the rows of the matrix which
contain the Row Protection Resistors. Some examples illustrate this method of
connection.
By exploring these examples, you can choose the base matrix configuration best
suited to your unique test application; the available base matrix configurations are
listed on page 12. Then, you can proceed to the section of Chapter 2 which
provides configuration and wiring instructions for the chosen base matrix.
4x32 Matrices
4x32 Topology
You can select the 4x32 matrix configuration by setting jumpers on the
appropriate terminal block or configuration block, or by D-Sub wiring.
Once configured for 4x32, the 34934A creates four matrices, each with 128
crosspoint non-latching reed relays organized in a 4-row by 32-column
configuration. You can operate these as four independent 1-wire matrices
(M1H, M1L, M2H and M2L) or as (H,L) pairs of two independent 2-wire matrices
(M1 and M2).
In 1-wire operation, the four matrices are:
– M1H: uses H (high) columns C1H-C32H and H rows R1H-R4H of M1.
– M1L: uses L (low) columns C1L-C32L and L rows R1L-R4L of M1.
– M2H: uses H columns C1H-C32H and H rows R1H-R4H of M2.
– M2L: uses L columns C1L-C32L and L rows R1L-R4L of M2.
The four matrices (M1H, M1L, M2H, M2L) are isolated from each other; however,
associated matrices (M1H-M1L, M2H-M2L) have larger capacitances to one
another than non-associated matrices (M1H-M2H, M1L-M2L).
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