SC5 Signal Conversion Analog Inputs
20
be the best solution, followed by triaxial cables, but both require dedicated connectors, which would not be
compatible with standard BNC connectors, and also more expensive cabling.
Depending on the signal source, the weaknesses inherent in the use of coaxial cables can possibly be reduced by
preparing shielded twisted-pair cables according to the general rules discussed below. These are suggestions;
improvements will depend on the measurement set-up, and have to be determined experimentally.
Shielded twisted-pair cables should not be used if the signal source is single-ended and referenced to PE, or a BNC
connector with the shield connected to PE is used at the experiment. The situation is depicted below:
Shielded twisted-pair cables can be used if the signal source is single-ended, but is referenced to a different GND
than PE. The GND can be on the shield of the connector (which must then be isolated from PE), or on a separate pin
inside the connector. The situation is depicted below:
Shielded twisted-pair cables should be used if the signal source provides a differential signal. The situation is
depicted below:
When preparing shielded twisted-pair cables, always make sure that the shield is connected to PE only on one side of
the cable. If possible, this should be the experiment side, as shown in the pictures above. If not possible, the cable
shield can be connected to the shield of the GND BNC connector (7) at the back of the SC5. This case is depicted
below:
The connection to the GND BNC connector at the back of the SC5 is shown below:
Experiment SC5
PE
AGNDMeas. GND
PE
Experiment SC5
PE
AGND
PE
To rear
panel
To Next Page
Loading...
Need help?
General