Operation Manual

EF1210 U
SER
M
ANUAL
72 http://www.aspi.com Copyright © 1999, All Rights Reserved
NCL
N
-
SET NOISE CANCELLATION LEVEL ON CHANNEL
N
The noise cancellation feature improves the signal-to-noise ratio of the incoming
microphone speech by either 6 or 10 dB. The NC
n
command enables or disables this
feature on the channel specified. The NCL
n
command selects between 6 and 10 dB of
noise cancellation. Noise cancellation is applied to each microphone channel.
The factory default setting for NCL
n
is 10 (normal).
Remote Commands
The following commands can be sent by the remote control device to change the
noise cancellation level.
EF1210 Messages
The following messages are sent by the EF1210 in response to an NCL
n ? command,
or in response to any NCL
n
command when acknowledgment mode is on.
Example
In the following example, the remote control device sets the noise cancellation level
to 10 dB on all channels on the EF1210 with Device ID number 12. Then it requests
the noise cancellation status on channel 5 and sets the noise cancellation level on
channel 7 to 6 dB of the same EF1210. Acknowledgment mode is enabled.
Remote Command Effects
NCL
n x Set noise cancellation level on channel n to x.
n ranges from 1 to 8.
x is either 6 dB or 10 dB.
NCL
n ? Request current noise cancellation level on channel
n.
EF1210 Message Message meaning
NCL
n x The noise cancellation level on channel n is x.
x is either 6 dB or 10 dB.
Note.
It is possible to use a wildcard (*) for setting NCLn to 6 or 10, but
not for querying.
Remote Command EF1210 Message
C12NCL*10 C12NCL*10
C12NCL5? C12NCL510
C12NCL76 C12NCL76