Operation Manual

EF1210 C
OMMAND
S
ET
R
EFERENCE
ASPI Digital - The Sound of DSP Technical Support: 404.892.3200 63
GAINI
N
-
SET
MIC/LINE
INPUT GAIN ON CHANNEL
N
The GAINI
n
command sets the M
IC
/L
INE
input gain level on channel n of the
EF1210 to a level between 0 dB and 31 dB. This corresponds to a nominal input sig-
nal level between 0 dBu to -31 dBu, respectively for line level. For mic level, this
corresponds to a nominal input signal level between -33 dBu to -64 dBu, respectively.
Setting GAINI
n
to 0 corresponds to a nominal input signal level of 0 dBu line level,
or -33 dBu mic level. Setting GAINI
n
to 31 corresponds to a lower nominal input
signal level of -31 dBu line level or -64 mic level.
The purpose of the input channel gain is to bring the signal level of the input channel
to a constant value at the A/D inside the EF1210. For example, if we expect a -10
dBu line level signal or -43 dBu mic level signal at the input of channel 2, we would
set the input gain of channel 2 to 10 dB by sending the command GAINI210. If we
expect a lower signal level, say -18 dBu line level or -51 dBu mic level, on channel 3
then we would turn up the gain by 18 dB on channel 3. This would be accomplished
by sending the command GAINI318.
The input channel gain is set using EF1210 calibration procedures (See “Calibration
Step 1: Calibrating Microphone Input Channels” on page 29.).
The factory default setting for GAINI
n
is 0 (0 dBu nominal level expected at input).
Remote Commands
The following commands can be sent by the remote control device to set the M
IC
/
L
INE
input gain level.
EF1210 Messages
The following messages are sent by the EF1210 in response to a GAINI
n ? com-
mand, or in response to any GAINI
n
command when acknowledgment mode is on.
Remote Command Effects
GAINI
n x Set M
IC
/L
INE
input gain on channel n.
n ranges from 1 to 8.
x ranges from 0 dB to 31 dB.
GAINI
n ? Request current M
IC
/L
INE
input gain on channel n.
Note.
The wildcard character (*) is not allowed for specifying the chan-
nel number n for the GAINIn command.
EF1210 Message Message meaning
GAINI
n x M
IC
/L
INE
input gain on channel n is currently x
dB.