QSC ABX Comparator, Руководство пользователя

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SPECIFICATIONS
SPECIFICATIONS
Functionality:
Calibration Mode
Amplifier A selectable; Channels 1 and 2 individually selectable
Amplifier B selectable; Channels 1 and 2 individually selectable
Calibrating Signal selected automatically
Trim control: 100 mV per step. Up to 2 Vrms max.
Calibrating Signal Display Range: 00.0 to 99.9 Vrms ±0.1 Vrms tolerance
Trial Mode
Audio signal “X” in each trial is selected randomly and automatically.
Trials will begin with number “01” and go up to “25,” maximum.
Judgment selections are made by pressing buttons A or B , then ENTER .
The next trial will begin immediately when the ENTER button is pressed, up until trial number 25.
The LCD will display the results and percentage.
Review Mode
Trial review will start with number “01” and go up to last trial of the session, with the ABX Compara-
tor recalling data from memory.
With each trial reviewed, the LCD will display the trial number and will identify both X and the
listener’s selection.
Audio Performance
Audio input and output
Input Stage: Mechanically balanced differential, electrically passive
Differential input impedance: 200 kilohms balanced and 100 kilohms unbalanced
Output stage type: Single-ended
THD+N (20 Hz –20 kHz): Less than 0.05%
Frequency response (20 Hz–20 kHz): +0, -0.1dB
Calibrating Signal
1 kHz, 1 Vrms sine wave (level externally adjustable)
Switching Relay Performance
Small signal relay: Contacts rated at 1.0 A and expected electrical life at rated load approximately
100,000 contacts.
Heavy duty relay: Contacts rated at 30 A and expected electrical life at rated load approximately
100,000 contacts.
Controls
Front: AC Switch, 8 function keys
IR remote control with 4 function keys
Indicators
Operational / mode status: LCD display
Calibration level readout: 7-segment LEDs
Remote status indicators: Miniature LEDs