AD122-96 MX
Appendix II
17
Note: Much information is available regarding proper shielding. The well known book "Grounding
And Shielding in Instrumentation" by Ralph Morrison provides an excellent explanation of the subject
and points out clearly that the floating shield connection is the correct configuration. Engineers using
the grounded configuration with 16-17 bit systems may wish to re-evaluate their interconnections for
20 bit systems.
1. Balanced input with floating shield: The unit handles up to 24dBu of peak signal with available 0-12
dB of front panel gain adjustment.
2. Balanced input with grounded shield: The unit handles up to 24dBu of peak signal with available 0-
12 dB of front panel gain adjustment
3. Unbalanced input with floating shield: The unit handles up to 24dBu of peak signal with available 0-
8 dB of front panel gain adjustment
4. Unbalanced input with grounded shield: The unit handles up to 24dBu of peak signal. The front
panel gain range is 0-8 dB.
Comments: The first three configurations operate over the same range. Little attenuation is required in
processing of a 24dBu signal (34.72V peak to peak).
When applying unbalanced signals, use at least 4 dB of gain, using the gain adjustment pots located on
the front panel.
