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Calibration Procedure for the BBE 482
(REV/S/ON 1.1)
NOTE: THIS UNIT WAS TESTED AND CALIBRATED AT THE FACTORY. THIS PROCEDURE IS FOR QUALIFIED PERSONNEL ONLY. INITIAL SETTINGS: 1. BBE Process controls VR1 and VR3 to minimum.(C.C.W.) 2. Lo Contour controls VR2 and VR4 to minimum.(C.C.W.) 3. Power switch �ON� and BBE function switch �IN�. POWER SUPPLY TEST: 1. With DVM set to DC volts, measure the positive end of C27. You should read less than +30vdc. 2. With DVM set to DC volts, measure the negative end of C29. You should read less than -30vdc. 3. With DVM set to DC volts, measure the voltage on JMP5. Reading should be +15vdc, (+/-0.5vdc). 4. With DVM set to DC volts, measure the voltage on JMP4. Reading should be -15vdc, (+/-0.5vdc). BBE PROCESS TEST: 1. Input a 5khz signal @ -l0dBu into channel A [B] input. 2. With DVM set to AC volts, measure the channel A [B] output. 3. With Process control at minimum (C.C.W.) DVM should read -11.5dBu (+/-1dBu). 4. With Process control at maximum (C.W.) DVM should read +2dBu (+/-1dBu). LO CONTOUR TEST: 1. Input a 50hz signal @ -l0dBu into channel A [B] input. 2. With DVM set to AC volts, measure the channel A [B] output. 3. With Lo Contour control at minimum (C.C.W.) DVM should read -11dBu (+/-1dBu). 4. With Lo Contour control at maximum (C.W.) DVM should read +3dBu (+/-1dBu). BYPASS TEST: 1. Input a 500hz signal @ -l0dBu into channel A [B] input. 2. With DVM set to AC volts, measure the channel A [B] output. 3. With the process �IN�, DVM should read -9dBu (+/-1dBu) and the Process �IN� LED should be on. 4. With the Process �OUT�, DVM should read -11dBu (+/-1dBu) and the Process �OUT� LED should be on. LED TEST: 1. Input a 5khz signal @ -20dBu into the channel A [B] input. The yellow -20 LED should light. 2. Change input level to -l0dBu. The yellow -12dBu LED should light. 3. Change input level to -5dBu. The green -6dBu LED should light. 4. Change input level to 0dBu. The green 0 LED should light. 5. Change input level to +18dBu. The red clip LED should light. END TEST.
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