BBE 362 - Manual (Page 13)

CALIBRATION PROCEDURES FOR THE BBE 362
NOTE: THIS UNIT WAS CALIBRATED AT THE FACTORY. THIS PROCEDURE IS FOR
QUALIFIED SERVICE PERSONNEL ONLY.
INITIAL SETTINGS:
1. BBE Process control VR2 and Lo Contour control VRl to minimum (fully C.C.W.).
2. Power switch on and Function switch in (Process on).
POWER SUPPLY TEST:
1. With DVM set to DC volts, measure the positive end of Cl. You should read less than +30 VDC.
2. With DVM set to DC volts, measure the negative end of C2. You should read less than -30 VDC.
3. Measure DC voltage on IMP 4. Reading should be +12 VDC, (+/1.5 VDC).
4. Measure DC voltage on IMP 11. Reading should be -12 VDC, (+/1.5 VDC).
BBE PROCESS TEST:
1. Input a 5kHz signal @ -lOdBu into Channel A [B] input.
2. Measure the Channel A [B] output with the DVM set to AC volts.
3. With Process control at minimum (fully C.C.W.), DVM should read -lO.SdBu (+/- 0.5dBu).
4. With Process control at maximum (fully C.W.), DVM should read -2dBu (+/- 0.5dBu).
LO CONTOUR TEST:
1. Input a 50Hz signal @ -lOdBu into channel A [B] input.
2. Measure the channel A [B] output with the DVM set to AC volts.
3. With Lo Contour control at minimum (fully C.C.W.) DVM should read -lOdBu (+/- 0.5dBu).
4. With Lo Contour control at maximum (fully C.W.) DVM should read -l.SdBu (+/- 0.5dBu).
BYPASS TEST:
1. Input a 500Hz signal @ -lOdBu into channel A [B] input.
2. Measure the channel A [B] output with the DVM set to AC volts.
3. With the Process in, the DVM should read -lldBu (+/- 0.5dBu) and the Process LED should
illuminate green.
4. With the Process out, the DVM should read -lO.SdBu (+/- 0.5dBu) and the Process LED should
illuminate red.
CLIP INDICATOR TEST:
1. Input a 500Hz signal @ +15dBu into the channel A [B] input.
2. Verify that the channel A [B] clip indicator is on.
3. Change signal input level to +13dBu and verify that the channel A [B] clip indicator turns off.
END TEST
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