Polycom EF2241 - Manual (Page 15)

I
NSTALLATION
© Polycom, Inc. 13 V ORTEX EF2241 Reference Manual
Presets and
Multiple Vortex
Devices
P RESET 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 (I
NPUT 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 P
OWER O N P RESET 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.
C
HECK
S
URROUNDING
E
QUIPMENT
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:
Pick a Standard
Signal Level
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
the Codec
Configure the matrix mixer output to the codec input. The output
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.
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
O UTPUT C HANNELS
Mute Off
NOM Attenuation
On for Outputs 1-4
On for Outputs A-D
Output Gain
0 dB
P ROGRAM P ARAMETERS F ACTORY D EFAULT P RESET V ALUE