OPTICAL MIC
INPUT
1 2 
Connecting the optical microphone
CAUTION! Risk of damage to fiber optic cable!
Fiber optic cable must not be bent like conventional cable!
When installing fiber optic cable, make sure not to bend it beyond a bend radius of 50 mm.
Before connecting the optical microphone, remove the protections caps from the microphone connections 1 and 2 of the central unit. Keep the protection caps in a safe place for reuse during transport or storage. They protect the microphone connections against dirt.
Connect the duplex connector of the optical microphone to the micro- phone connections 1 and 2 of the central unit. Please observe the correct insertion direction of the connector. The duplex connector is connected the correct way round when the label on the connector is facing downwards as shown.
Switching the central unit on/off
After connection to the mains, the device switches on automatically and the ON button lights up.
Press the ON button to switch the MO 2000 CU central unit on or off.
Note:
If the power supply is interrupted for several seconds (e.g. due to a power failure), the device switches on automatically even if it was switched off before.
Adjusting the sensitivity
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| With the microphone connected and both the gain switch | and the level | |
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| control set to 0 dB, the specified sensitivity (mV/Pa) is obtained. | ||
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| Use the gain switch | to increase the output voltage level by 20 dB | |
0 | 20 | 40 | +/- 15dB | (tenfold increase) or 40 dB (hundredfold increase). |
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| 0 |
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| dB |
| OVERLOAD | Use the level control | to steplessly adjust the output voltage level | |
| GAIN |
| LEVEL | between |
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0 20 40 | +/- 15dB |
| 0 |
| OVERLOAD |
dB | LEVEL |
GAIN |
Overload indication
The OVERLOAD LED indicates both positive and negative voltage peaks.
If the OVERLOAD LED | lights up: |
Use the gain control | and/or the level control to reduce the output |
voltage level so that the OVERLOAD LED no longer lights up.
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