8
8
9
9
Data interface
To use the interface for data transfer, you need a special RS-232 / phone jack
cable. This can be found in our range. Since modern computers usually don‘t
offer a serial port anymore, one also needs a USB -> COM adapter.
You also find two additional analog outputs:
X
The AC output delivers the microphone signal.
X
The DC output delivers the envelope, the volume response as a curve.
To capture the respective data, connect the device to the input of a sound
interface using two ‘3.5 mm mono jack to RCA cable’. Open a wave editor and
create a new file (stereo). By recording your audio signal you get two wave-
forms (Left / Right). On the left channel, the microphone signal is mapped. If
the signal is driven to 100%, the value of 130 dB is reached (maximum level).
Replacing the Battery
When the display flashes and the message ‘BAT’ appears, the 9 V battery is
exhausted and should be replaced as soon as possible. Unscrew the lid of the
battery compartment on the rear panel of the unit using a screwdriver. Insert a
new battery and close the cover.
External power supply
This device may only be operated with the stabilized power supply unit
GNG8922. Insert the AC adapter plug into socket 11 on the GSH8922.
Serial Interface
The output of the measured values is made as a continuous ASCII string in the
unit selected on the device. Line termination is made with CR and LF.
Interface parameter:
2400BD8N1
Output:
N:044.5dB <0D, 0A>
