A16 Test Set Motherboard - Agilent Technologies E8362C Service Manual

Theory of Operation
Source Group Operation

A16 Test Set Motherboard

The A16 test set motherboard serves these functions:
• to act as an interface between the A15 CPU board and the auxiliary rear panel interconnects.
• to provide ALC signals to the A21 SOMA 50 and to the A18 multiplier/amplifier.
• to route control signals to the signal separation group. Refer to
page 5-16 for more information.
Rear Panel Interconnects
The A16 test set motherboard includes the following rear panel interconnects.
TEST SET I/O
HANDLER I/O
AUX I/O
I/O 1 (TRIG IN)
I/O 2 (TRIG OUT)
5-12
A DB-25 female connector that is used to control external test sets. The external test set
bus consists of 13 multiplexed address and data lines, three control lines, and an
open-collector interrupt line. Pin assignments are listed in
Up to 16 test sets may be "daisy-chained" on the bus at one time.
The Test Set I/O is not compatible with 8753 network analyzer test sets.
A rectangular 36-pin, female connector providing four independent parallel input/output
ports, nine control signal lines, one ground, and a power supply line. This connector has
Type 2 output pin assignments as listed in
All signals are TTL-compatible. Data input/output ports consist of two 8-bit output ports
(Port A and Port B) and two 4-bit bidirectional ports (Port C and Port D).
Connector settings can be changed using SCPI and COM commands. The settings are not
accessible from the front panel.
A DB-25 male connector that provides a variety of both analog and digital input and output
signals as described in Table 5-5 on page
A BNC connector for input of an external trigger. The analyzer can be triggered by an
external device using this input. This is the same signal that appears on AUX I/O pin 19 as
described in Table 5-5 on page
A BNC connector for output of a trigger signal. This trigger signal can be used to trigger
external devices used in the measurement setup, such as signal generators.
PNA Series Microwave Network Analyzers
"Signal Separation Group Operation" on
Table 5-4 on page
5-15.
5-15.
E8362C, E8363C, E8364C
Table 5-3 on page 5-13.
5-14.
Service Guide E8364-90038