SoundConnect
TM
Manual
4
Microphone Preamplifier
SoundConnect comes standard with a Brüel & Kjær 7-pin LEMO
connector.
Table 1: Pin Connections for the Lemo Preamplifier Socket
Polarization Voltage
Just above the preamplifier input socket is a three-position slide switch for selecting 0, 28, or 200 volts
microphone polarization. The 0 volt setting is for prepolarized condenser microphones.
Important!
The BNC input does not provide microphone powering, e.g.; IEPE. Microphone power is
available only from the Lemo Connector.
Calibration
The ANSI S1.40 standard recommends that a certified calibration laboratory calibrate test instrumentation
at least once a year.
Service and Repair
SoundConnect is designed and constructed to provide the user with many years of safe and trouble free
operation. However, should a fault occur which impairs its correct functioning and operating safety, it
should be immediately shut off, disconnected at the mains source and disconnected from other hardware.
For repair, contact your local LISTEN service representative. Under no circumstances should persons not
qualified in the service of electronic instrumentation attempt repair.
Pin
LEMO
1
Ground
2
Ground
3
Polarization voltage
4
Signal input
5
Not connected
6
Power supply positive
7
Power supply negative
Case
Connected to instrument chassis
6
5
7
1
2
3
4
Polarization
Voltage
+14V DC
-14V DC
Figure 1-3: Lemo Socket