Listen SoundConnect 2, User Manual

Page: 16 / 27

10 Software Control SoundConnect 2
TM
Manual
Bias

Off - No Bias

7.5 kOhm - used for SCM mics and 2.2 kOhm - typically used for testing electret capsules - BNC
connector only

10 mA and 4 mA - for IEPE microphones - BNC connector only

+200 VDC Polarization voltage - Lemo connector only

+/- 15 VDC - Voltage is always present on the Lemo connector, pin 6 (+) and pin 7 (-)
High Pass

1 Hz, 10 Hz, 20 Hz, 100 Hz
Low Pass

22.4 kHz, 120 kHz
Overall settings for unit:

Panel Lock - When On the front panel buttons are
disabled

Output Gain - When ON the Output Gain of channels
1 and 2 are increased by 6 dB. See
Output Gain
0 dB / +6 dB option on page 11
.
This Gain value is taken into account when Auto
Read is used in the Calibration Editor for an Input
Signal Path.

Ground Lift - Off = Chassis Ground (default). Allows
you to interrupt the connection between the Line In/
Out Grounds and the Chassis Ground. Only select
Lift when you are trying to resolve noise issues due
to a Ground Loop.
SoundCheck Acquisition Step Gain Field
Important! Switching Listen Hardware from Maximum Gain to Minimum Gain in the
Acquisition Step is not recommended. This does not allow the input gain
circuit sufficient time to stabilize. If you need to switch from Max Gain to
Minimum Gain we recommend that you use a Listen Hardware Message
step with a 500 mSec wait time to allow for settling.
Figure 2-3: Overall Settings