4
Operation
4-1
4.1
Introduction
This section contains a complete, detailed description of
each front and rear panel aspect of the Model 708A.
4.2
Setup data paths
The design of the Model 708A is optimized for high speed
switching of relay setups for matrices with a maximum of 8
rows by 12 columns (one unit) to 8 rows by 60 columns (five
units). If no rows are selected for make/break or break/make
operation, previously stored setups can be switched to the re-
lays at a rate of up to 200 setups per second.
Besides the triggering of stored setup data to the relays, setup
data can be routed to and from the sources and destinations
shown in Figure 4-1. The data paths are selected by the
IEEE-488 bus operations listed in Table 4-1.
In addition to other front and rear panel operations, this sec-
tion describes setup data transfers that are performed from
the Model 708A front panel. Section 5 describes the bus op-
erations that transfer setup data.
Figure 4-1
Paths for relay setup data
Table 4-1
Setup data paths
Setup data path
Action required
Display-Memory
Display-Relays
Bus command
Front panel COPY key (Note 1)
Memory-Display
Memory-Relays
Memory-Controller
Memory-Memory
Automatic operation (Note 2)
Bus command or any valid trigger
Bus command
Bus command
Relays-Display
Relays-Memory
Relays-Controller
Automatic operation (Note 3)
Bus command
Bus command
Controller-Memory
Controller-Relays
Bus command
Bus command
Notes:
1.
Generation of the automatic copy is selected by a front panel key.
COPY LED is lit.
2.
The automatic operation is generated if the displayed setup has
been changed by a bus command and has not been modified from
the front panel.
3.
The automatic operation is generated if the displayed setup has
been changed by a trigger or bus command and has not been
modified from the front panel.
4.
All controller modifications to setups are reflected on the cross-
point display if the affected setup is presently being displayed.
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