2-4
GPIB SETUP AND
INTERCONNECTION
The 680XXB provides automated microwave signal generation via the
GPIB. The following paragraphs provide information about interface
connections, cable requirements, setting the GPIB operating paramen-
ters, and selecting the external interface language.
Interface
Connector
Interface between the CW generator and other de-
vices on the GPIB is via a 24-wire interface cable.
This cable uses connector shells having two connec-
tor faces. These double-faced connectors allow for
the parallel connection of two or more cables to a sin-
gle device. Figure 2-1 shows the location of the rear
panel GPIB connector.
Cable Length
Restrictions
The GPIB can accommodate up to 15 instruments at
any one time. To achieve design performance on the
bus, proper timing and voltage level relationships
must be maintained. If either the cable length be-
tween separate instruments or the cumulative cable
length between all instruments is too long, the data
and control lines cannot be driven properly and the
system may fail to perform. Cable length restrictions
are as follows:
No more than 15 instruments may be installed
on the bus.
Total cumulative cable length in meters may
not exceed two times the number of bus instru-
ments or 20 meters—whichever is less.
NOTE
For low EMI applications, the GPIB cable
should be a fully shielded type, with well-
grounded metal-shell connectors
GPIB Inter-
connection
The only interconnection required for GPIB opera-
tion is between the CW generator and the controller.
This interconnection is via a standard GPIB cable.
The
WILTRON
Part number for such a cable is
2000-1, -2, or -4 (1, 2, or 4 meters in length).
Setting the
GPIB
Address
The default GPIB address is 5. If a different GPIB
address is desired, it can be set from the front panel
using the Configure GPIB Menu.
To change the GPIB address, first press the front
panel main menu key labeled
SYSTEM
. The Sys-
tem Menu (shown on the following page) is dis-
played.
GPIB SETUP AND
INSTALLATION
INTERCONNECTION
680XXB OM
2-7
Summary of Contents for 680 B Series
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Page 11: ...Figure 1 1 Series 680XXB Synthesized CW Generator...
