S01GAINGIL>3
Increase incoming gain on all line
inputs by 3 dB.
S01GAINIAa
S01GAINIBb ,
where a and b are the new values of each
of the line inputs. If this command was
issued after the example above, then the
status messages would be:
S01GAINIA10
S01GAINIB10 .
S01GAINGIL?
Query gains on all line inputs.
S01GAINIAa
S01GAINIBb ,
where a and b are the new values of each
of the line inputs. If this command was
issued after the example above, then the
status messages would be:
S01GAINIA10
S01GAINIB10 .
8.58. GAINI -- Set Input Gain
The input channels of the Vortex pass through an analog gain stage before reaching the analog to
digital converter. The gain of this stage is adjustable via a digitally controlled analog trim pot. It is
important that this gain is set correctly in order to maximize the resolution and quality of the signal at
the analog to digital converter. This command lets you adjust the gain of these input gain stages. For
volume control, the
FADERI command can be used to adjust the signal level in the digital domain
without affecting the calibration.
This command also adjusts the gain of the input signal coming from the telephone interface.
The following table shows the relationship between the input gain settings (via GAINI and
MIC) and
the nominal level expected at each of the inputs.
Input Channel
MIC Setting GAINI Setting (dB)
Expected level at Input (dBu)
1 1 (mic level) 0 to 30 0 to -30
1 0 (line level) 0 to 30 33 to 3
A-B N/A (line level) 0 to 20 0 to -20
The GAINIT command has a range of -100 to +20.
This command is a channel integer command. See
Section 6.3 and Section 6.2 for more information
on this type of command. The minimum and maximum values for this command are 0 and 20 or 30,
respectively.
This command is saved to non-volatile memory only as part of a preset. The state of this command
will be restored after power-up only if a preset is saved and that preset is set to be the power-on
preset.
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