CMC 356 Reference Manual
54
6.3.5
Low Level Outputs "LL out" for External Amplifiers
Note:
The low-level outputs "LL out 7 - 12" are only available, if the option
LLO-2
is installed.
Both SELV interface connectors "LL out 1 - 6" as well as the optional
"LL out 7 - 12" (if applicable) hold two independent generator triples each.
These six high accuracy analog signal sources per connector can serve to
either control an external amplifier or to directly provide small signal outputs.
In addition, each SELV interface connector provides a serial digital interface
(pins 8-16; see below) that transmits control and monitor functions between
the
CMC 356
and the external amplifiers. Supported devices are the
CMA 156
,
CMA 56
1
,
CMS 156
,
CMS 251
1
and
CMS 252
1
.
The low level outputs are short-circuit-proof and continually monitored for
overload. They are separated through reinforced insulation from the power
input and from the load outputs (SELV interface). They deliver calibrated
signals in the range from 0 to 7 V
eff
nominal (0 to ± 10 V
peak
).
Both the selection of the particular amplifier as well as the specification of
the range of the amplifier takes place in the
Test Universe
software.
Table 6-9:
Pin assignment of
"LL out 1-6" (lower 16-pole
Lemo socket); view onto
the connector from the
cable wiring side.
The pin assignment of
"LL out 7-12" socket is
identical.
"LL out 1-3" and "LL out 4-6" (and optionally "LL out 7-9" and "LL out 10-12")
each make up a selectable voltage or current triple.
1
These products are not available anymore.
Pin
Function
LL out 1-6
Function
LL out 7-12
1
LL out 1
LL out 7
2
LL out 2
LL out 8
3
LL out 3
LL out 9
4
Neutral (N) connected to GND
5
LL out 4
LL out 10
6
LL out 5
LL out 11
7
LL out 6
LL out 12
8-16
For internal purposes
Housing
Screen connection
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
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