Testing The Audio Inputs And Outputs; Wiring From Viewstation 128 / H.323 / Mp / 512 To Vortex Device; Input To View Station Codec From Output Of Vortex Device - Polycom Vortex EF2241 Application Note

T
ESTING THE
1. Go to S
I
YSTEM NFO
You must enable the codec's internal echo canceller in order for the audio meter
described in Step 2 to work properly.
2. Go to S
I
YSTEM NFO
Your level should be around 0 on the meter. You may also use the loop-back feature to listen to
your own audio in the local room. That feature is under S
3. Go to S
I
YSTEM NFO
4. Go to S
I
YSTEM NFO
W
IRING FROM
V D
TO ORTEX
The inputs and outputs to most codecs are unbalanced. We recommend keeping the cable
from the Vortex device as short as possible to avoid any common-mode signals that may
corrupt the audio.
I V S
NPUT TO IEW TATION CODEC FROM
Connect the Positive conductor of the Vortex device to the Tip of the RCA connector and the Negative
conductor of the Vortex device to Shield of the RCA connector.
The shield of the cable is not connected.
A I
UDIO NPUTS AND
, A S , P A
DMIN ETUP HONE
, D , A , A
IAGNOSTICS UDIO UDIO
, D , A , G
IAGNOSTICS UDIO ENERATE
, A S , P A
DMIN ETUP HONE
V S
IEW TATION
EVICE
O
UTPUT OF
O
UTPUTS
, and check the E
UDIO CHO
M and then speak into one of the microphones.
ETER
I
YSTEM
T to listen to a codec-generated 1 kHz tone.
ONE
, and un-check the E
UDIO
128 / H.323 / MP / 512
V D
ORTEX EVICE
C option.
ANCELLER
, D , N E
NFO IAGNOSTICS EAR
C option.
CHO ANCELLER
L .
ND OOP
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