API Audio 1608 Recording Console - Manual (Page 41)

40
7.7 Peak Threshold
The 840B Peak Threshold section allows the selection of one of six Peak Thresholds. When the
signal in a channel crosses the selected threshold, the MIC button on that channel turns red,
indicating a peak has been reached. There is also a selector position and trim-pot for Peak
Indicator calibration.
The 840B Peak Threshold controls function as follows:
CAL (trim-pot): Calibrates the Peak Indicator
 CAL must be selected on the Peak Threshold selector
7.8 Oscillator
The 840B Oscillator section provides a full-range sine wave oscillator with the following
features:
 Twelve frequency selections from 20Hz to 20kHz
 On/off switch
 Level control
 Assignment to the Program and Summing Buses
 Balanced, line-level output
The 840B Oscillator controls function as follows:
LEVEL: Controls the output level of the Oscillator
ON: On/off switch for the Oscillator output
 The Oscillator output is fed to the OSCILLATOR output connector on the rear panel
 Illuminates in red when engaged
TO BUS: Routes Oscillator output to the Program and Summing Buses
 The Left and Right Program Bus Output Masters must be turned ON with the level up to
enable the Oscillator to feed the Program Buses
 The eight Summing Bus Sub-masters (SUB 1-8) must be turned ON with the level up to
enable Oscillator to feed the Summing Buses
 Automatically engages the CR DIM function when engaged
 Illuminates in red when engaged
Peak Threshold Selector: Selects the Peak Indicators threshold
from the following choices:
 +4dBU
 +8dBU
 +12dBU
 +16dBU
 +20dBU
 +24dBU
 CAL
Frequency Selector: Selects the Oscillator frequency from the
following choices:
 20Hz
 50Hz
 100Hz
 300Hz
 500Hz
 1kHz
 2kHz
 3kHz
 5kHz
 8kHz
 10kHz
 20 kHz