Sony IPELA PCS-HG90 Operating Instructions Manual page 121

To use the microphones
Select "EC-MIC (A7)" under "AUDIO IN" on Page 1/3 in the Audio Setup
menu. (See page 41.)
Notes on placing the PCSA-A7 microphones
• Position the microphones about 50 cm (1.6 ft) away from the participants.
• When using speakers, do not place them in front of the microphones.
Configuration using the PCSA-A7 microphones
Power is supplied to up to eight microphones connected to the Communication
Terminal or the AC adaptor, including cascade connections. However, using
the 8-meter microphone cable counts as 4 microphones.
Power is not supplied to any connected microphones that exceed this limit.
You can add more microphones, by connecting the AC adaptor to the first
microphone with no power supply.
Notes
• Up to 40 PCSA-A7 microphones can be connected to one port, using a cascade
connection.
• The POWER LED turns off on a microphone with no power supply.
Setup example 1:
5
The 8-meter microphone cable counts as four microphones, and power is
supplied to only the first four microphones. The same is true if the 8-meter
microphone cable is used in the middle of the connections.
6 7
Using the Echo Canceling Microphones
8 9 10
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