Operating instructions

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To calibrate the analog line inputs:
1. Connect the analog reference generator to the analog input channel of the 2192.
2. Connect the digital output of the 2192 to the digital signal meter.
3. Set the reference generator to output a 1kHz sine wave at the desired nominal signal
level. The factory setting is +4dBu.
4. Adjust the input trim until the desired RMS digital level is obtained. The factory setting is -
18dBFS.
5. Repeat these steps for the other channel.
To calibrate the analog line outputs:
1. Connect the digital tone generator to a digital input of the 2192.
2. Connect the analog output channel to the analog level meter.
3. Set the digital signal generator to output a 1kHz sine wave at the desired nominal RMS
signal level. The factory setting is -18dBFS.
4. Adjust the output trim until the desired analog output level is obtained. The factory setting
is +4dBu.
Output Level Meter Calibration
If the rear panel output trims are changed from the factory defaults, the (+22dB equals 0dBFS)
output meters will no longer be correctly calibrated. The input trims have no effect on the meters,
and no calibration is needed after input trims are adjusted.
The clip indicator (top LED) is not part of metering circuit. It is controlled by the processor, and is
illuminated when a digital clip occurs. It is hard wired in the unit and cannot be adjusted.
Important: Because there are potentially dangerous voltages present inside the unit, as
well as sensitive electronic components, meter calibration should be performed by
qualified service personnel only!
Output Meter Calibration Procedure
Having completed the input and out trim procedure (see top of this page), the output meters will
need to be recalibrated. The factory default has the unit set so the a 0dBFS digital level equals an
analog level of +22dB.
Required tools:
In addition to the gear listed for the analog output trim procedure, a small non-conductive plastic or
nylon Phillips screwdriver is required.