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1-6.
Microphone Power and Intercom Settings
1-6-1.
Outputting Microphone Power Voltage +12 V (AB-Power)
A microphone power voltage of +12 V can be supplied to the microphone connected to the AUDIO IN connector.
1.
Open the OPTION [S11] page of the SERVICE menu.
2.
Set "MIC AB POWER" to "ENABLE".
3.
Set the microphone power switch on the connector panel at the rear of the unit to "•".
Power voltage +12 V (AB-Power) is supplied to the microphone connected to the AUDIO IN connector.
1-6-2.
Intercom Settings
Since there are several types and usages of the headset for intercom, make appropriate settings for each type.
Talk (Microphone) Settings
Check characteristics of the microphone attached to the headset and make settings by the menu of the unit. Microphone
sensitivity, power supply method, balanced/unbalanced input can be set. Intercom 1 and intercom 2 are independent,
and therefore make settings for each intercom.
General carbon microphone
1.
Set INTERCOM1 MIC (or INTERCOM2 MIC) on the HEAD SET page of the OPERATION menu to
"CARBON".
Microphone sensitivity, power supply method, balanced/unbalanced input are automatically set.
General dynamic microphone
1.
Set INTERCOM1 MIC (or INTERCOM2 MIC) on the HEAD SET page of the OPERATION menu to
"DYNAMIC".
2.
Set "UNBAL" (balanced/unbalanced input) on the HEAD SET page according to the microphone.
Microphone sensitivity and power supply method are automatically set.
Other microphones
1.
Set INTERCOM1 MIC (or INTERCOM2 MIC) on the HEAD SET page of the OPERATION menu to
"MANUAL".
2.
Set the following items on the HEAD SET page according to the microphone to be used.
• LEVEL (microphone sensitivity)
• POWER (power supply method)
• UNBAL (balanced/unbalanced input)
Receive (Headphone) Settings
Headphone operation varies depending on the headset connection.
The following description is provided when the right ear is connected to Pin 5 of the intercom connector and the left ear
is connected to Pin 4 of the intercom connector.
In the case of dual-type headphone to listen the same sound with both ears or single-type
headphone
1.
Set "INTERCOM RECEIVE SELECT" on the RECEIVE SEL page of the OPERATION menu to "MIX". The
same sound is output from right and left.
HDC4300
1-12
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