Specifications

18 System Introduction Chapter 1
to generate interrupts, trigger delays, and pacing.
Agilent E6198A
Switch/Load Unit
The 21-slot Switch/Load Unit (SLU) holds the pin matrix cards and the load
cards. Test system instrumentation, loads and power supplies are routed to
the UUT through the pin matrix cards and load cards that plug into the
Switch/Load Unit. There are two types of pin matrix cards and four types of
load cards (described below).
Agilent E8792A and
E8793A Pin Matrix
Cards
These cards consist of a 32x4 matrix, which provides fast connections into
or out of the system for 32 rows into 4 columns (plus a fifth column for
UUTCOM). The four columns are collectively referred to as the Analog
Bus. High reliability switching is assured through jumper removable
protection resistors on the cards. Additional pin matrix cards may be added
to increase the system pin-count capabilities.
Agilent E8792A 32-Pin
Matrix and Instrument
Multiplexer Module
This module provides connections of up to 16 instruments and modules to
the Analog Bus and to the 32-pin matrix connections to the Test System
Interface or Mass Interconnect. The 32-pin matrix is a 4 x 32 matrix with
series disconnect and bypass relays, as shown in Figure 1-5. The default
mode for each column has a 200Ω protection resistor in series with each
column, with the parallel bypass relay open. This provides relay protection,
while allowing two-wire ohms measurements when the parallel relay is
closed. The disconnect relay switches reduce the parasitic capacitance on the
bus when open. The auxiliary (Aux) relays allow a switchable path from a
node on the UUT to one of the Direct Connect ICA Detectors/Sources, Test
System Interface or Mass Interconnect. Typical uses for the Aux relays
include connecting an optional DAC, Digital I/O, or other system resources,
such as the Agilent E1418A DAC.
Figure 1-4. Pin Matrix Cards Conceptual Block Diagram
Agilent E8792
Pin Matrix Card
16 x 5
Instrument
Matrix
32 x 4
Measurement
Matrix
Agilent E8793
Pin Matrix Card #1
32 x 4
Measurement
Matrix
Analog
Bus
Agilent E8793
Pin Matrix Card #n
32 x 4
Measurement
Matrix
Analog
Bus
16 Instrument
Channels
32 Measurement Channels
To/From UUT
32 Measurement Channels
To/From UUT
32 Measurement Channels
To/From UUT
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