Description
R&S
®
TS-PWA3
21
User Manual 1157.8143.12 ─ 17
Concept of the Analog Bus
Figure 3-11: Principle of the Analog Bus
The analog bus in the R&S TS-PWA3 connects I/O channels of different plug-in mod-
ules to each other. These I/O channels may be connections of instruments (measuring
and stimuli devices) and connections of the test device. Up to 8 signals can be connec-
ted simultaneously (see
).
The analog bus can be used flexibly with the ROHDE & SCHWARZ- specific plug-in
modules. 8 equivalent lines are basically available (ABa1, ABa2, ABb1, ABb2, ABc1,
ABc2, ABd1, ABd2). External instruments are usually connected to the R&S TS-PWA3
with a rear I/O connection. The signals for the test device are made available at the
front-end connector of the various plug-in modules on the R&S TS-PWA3.
The analog bus can be used in different ways:
●
as 1 bus with 8 lines
●
in 2 part-buses with 4 lines each
The split of the analog bus into part-buses depends on the plug-in modules which are
used and the application that is to be implemented.
The analog bus concept of the R&S TS-PWA3 fully meets the requirements that are
frequently made in metrology:
●
A small number of bus lines for a high number of I/O channels (e.g. In-Circuit-Test
with 3 to 6 bus lines.)
●
As many signals as possible simultaneously for a moderate number of I/O chan-
nels (e.g. function test with 8 lines of 50 to 100 I/O channels).
●
Parallel test with split analog bus.
Line paths or higher-frequency signals are usually connected locally by special switch-
ing modules and not via the analog bus.
Typical Use of the Analog Bus
The use of the analog bus and individual bus lines is illustrated with available R&S
modules and standard modules (see
Construction
