Agilent Technologies 35670A User Manual

To connect microphones
1 Press [
Input
][
ALL CHANNELS
][
FRONT END CH* SETUP
], then press [
COUPLING AC DC
]
to highlight AC.
2 If you are using condenser microphones, set the 200 V polarization voltage
switches—located next to the seven-pin input connectors on the microphone power
supply—to ON.
or
If you are using electret (prepolarized condenser) microphones, set the switches to
OFF.
3 Attach the microphone output cables to the seven-pin input connectors as shown in the
illustration.
CAUTION Unlike other condenser microphones, electret microphones do not require an external
polarization voltage. To avoid a temporary change in microphone sensitivity (or
possible damage), make sure you set the 200 V polarization switch to OFF before
attaching an electret microphone to the corresponding seven-pin input connector.
The output signal from a microphone preamplifier usually has a significant dc offset.
If the corresponding input channel is dc-coupled, this offset can cause overloads as
you increase the channel’s sensitivity. You can prevent dc overloads by selecting
ac-coupling.
LEMO 18307C
connector.
200 V polarization
voltage switch.
Option AY6
Agilent 35670A
Operator's Guide Measuring Sound
3-3

Agilent Technologies 35670A Specifications

General

Brand	Agilent Technologies
Model	35670A
Category	Measuring Instruments
Language	English