Polycom EF2241 manual Check Surrounding Equipment, Presets and Multiple Vortex Devices

	INSTALLATION
PROGRAM PARAMETERS	FACTORY DEFAULT PRESET VALUE
Input Gains	Mic Mode + 15 dB = 48 dB for Inputs 1-4
	0 dB for Inputs A-D
Manual Threshold	60 dB
Mute	Off
Noise Cancellation	On
Noise Cancellation Level	10 dB
Phantom Power	On
OUTPUT CHANNELS
Mute	Off
NOM Attenuation	On for Outputs 1-4
	On for Outputs A-D
Output Gain	0 dB

Presets and

Multiple Vortex

Devices

PRESET 0 is preconfigured for a system with multiple Vortex devices. In Preset 0, microphones are bussed out to other units on the W Bus. Microphones are also input into each device on the W Bus (INPUT WM0 in the Matrix).

If you have multiple devices in your system, save settings to a user preset (Presets 16-

47)on each device. Saving a preset will only save the preset on that particular unit. Also, remember to set the POWER ON PRESET to the User Preset that you have saved your settings to otherwise the device will revert back to Preset 0 (factory default) if power is lost.

CHECK SURROUNDING EQUIPMENT

Pick a Standard Signal Level

Now that the physical connections to the EF2241 are set up, it may be necessary to check the surrounding equipment to make sure levels are set correctly. The following suggestions may be helpful in integrating the EF2241 into your system:

A standard nominal signal level should be used throughout the audio system. Any equipment that does not operate at this standard level should be compensated for as close to the piece of equipment as possible. A 0 dB nominal level is a good standard signal level. For example, a consumer VCR will probably generate a -8 dBu level. As soon as the VCR signal arrives at an input with some gain control, the input gain should be adjusted so that you get a 0 dB level, i.e. adding 8 dB of gain.

Check Levels to Configure the matrix mixer output to the codec input. The output

the Codec gain of the matrix mixer should be set to match the nominal input level of the codec. For example, if the codec accepts -10 dBV (-8 dBu) inputs, 8 dB of attenuation should

be applied at the matrix mixer output to the codec.

© Polycom, Inc. 13 VORTEX EF2241 Reference Manual