Behringer D A-440 User Support Bulletin Download

Page: 21 / 23

Synthesizers and Samplers

MODEL D

page 21 of 23

On the PCB, locate the OSC SW pot

Turn all the Octave RANGE knobs to the 2' position in the OSCILLATOR BANK section.

OSC3 Scale Adjustment

OSC3 Range Adjustment

Octave Adjustment

OSC1 Scale Adjustment

OSC1 Range Adjustment

OSC2 Range Adjustment

OSC2 Scale Adjustment

Highest A5

Lowest A2

Highest C6

RANGE

Summary of Contents for D A-440

Page 1: ...scale that can display accurately to 0 001 V 2 Laptop or desktop computer previously loaded with and running a MIDI utility that can send SysEx commands to the MODEL D 3 USB type A to USB type B conne...

Page 2: ...ar tuner or the internally generated A 440 concert pitch and an external keyboard See Oscillator Calibration 3 The Octave RANGE can be calibrated using an external keyboard See Octave Range Calibratio...

Page 3: ...if you are doing the PITCH CV calibration or doing a Reset Connections Follow all steps in the order in which they are presented The diagram below shows the typical connections for this procedure Pre...

Page 4: ...IN 0 LOUDNESS ATTACK 0 LOUDNESS DECAY SEC LOUDNESS SUSTAIN 10 SWITCHES FILTER MODE LO FLTR MODULATION OFF KEYBRD CONTROL1 OFF KEYBRD CONTROL2 OFF FILTER DECAY OFF LOUD DECAY OFF EXTERNAL KEYBOARD MOD...

Page 5: ...over the top edge of each side panel Make sure that the top panel is in a secure position and that it is not liable to be dropped or damaged or become disconnected with its internal cables or the MID...

Page 6: ...ttom surface of the PCB as shown on the next page The diagram below shows the Test Points TP1 and TP2 used in the PITCH CV calibration Take a look at the PCB and locate these two test points The diagr...

Page 7: ...t A5 Lowest A2 Highest C6 PITCH CV Calibration The PITCH CV calibration procedure uses a computer MIDI utility to send a SysEx command to the MODEL D to put it into calibration mode Once in calibratio...

Page 8: ...MODEL D as the MIDI IN and MIDI OUT The following example shows the use of the popular MIDI Utility MIDI OX to send a SysEx message from your computer to the MODEL D to put it into PITCH CV Calibratio...

Page 9: ...Synthesizers and Samplers MODEL D page 9 of 23 page 9 of 23 Select Pass SysEx at the bottom of the Options pull down menu It might already be ticked which is fine In the VIEW Menu select SysEx...

Page 10: ...EL D page 10 of 23 page 10 of 23 In the Command Window enter the SysEx command to be sent to the MODEL D For PITCH Calibration the command is F0 00 20 32 00 7F 0E 00 00 00 F7 In the Command Window dro...

Page 11: ...will then be in its PITCH Calibration mode If you wanted you can use the SAVE AS command in the Command Window drop down menu to save the SysEx message as a file on your computer for later use Then u...

Page 12: ...y procedures shown in section 5 1 have been followed and the MODEL D front panel controls and switches are set as directed Set the Digital Voltmeter to measure a range below 10 VDC S Locate the Test P...

Page 13: ...rement fine F3 increment coarse TIP You can press and hold an increment or decrement key and after a brief delay the output adjustment will repeat automatically until the key is released C4 C 4 D4 E4...

Page 14: ...he output voltage It should read 6 500 VDC If required the output voltage can be adjusted to this value by pressing the following keys The Pitch CV output adjustment resolution is about 2 mV C3 decrem...

Page 15: ...ected and secure its front panel assembly back onto the chassis using the 8 screws Exiting the PITCH CV Calibration Procedure Exiting the PITCH CV Calibration Procedure This calibration does not requi...

Page 16: ...h Value Oscillator Calibration C6 Octave Calibration Calibration Procedure using a guitar tuner OSC1 Range and Scale Calibration Make sure that the preliminary procedures starting on page 3 above have...

Page 17: ...e A5 key and adjust the OSC2 RANGE trimpot on the PCB while observing the tuner display Turn OFF the OSC2 switch On your external keyboard press and hold the A5 key and adjust the OSC3 RANGE trimpot o...

Page 18: ...to get right Turn OFF the OSC3 switch Calibration Procedure using A 440 OSC1 Range and Scale Calibration Make sure that the preliminary procedures starting on page 3 above have been followed and the...

Page 19: ...bination of OSC1 and OSC2 and adjust the OSC 2 RANGE trimpot on the PCB for zero beats between them Turn OFF the OSC2 switch As set up in the previous procedure the A 440 test tone should be off and t...

Page 20: ...nt panel assembly back onto the chassis using the 8 screws On your external keyboard press and hold the A2 key Listen carefully to the combination of OSC1 and OSC3 and adjust the OSC3 SCALE trimpot on...

Page 21: ...e OSC SW pot Turn all the Octave RANGE knobs to the 2 position in the OSCILLATOR BANK section OSC3 Scale Adjustment OSC3 Range Adjustment Octave Adjustment OSC1 Scale Adjustment OSC1 Range Adjustment...

Page 22: ...already on OSC1 and 2 Volumes are up On your external keyboard press and hold the C6 key You should hear both OSC1 and OSC2 Adjust the headphone volume or main volume as required OSC2 ON OSC1 ON OSC1...

Page 23: ...efully and adjust the OSC SW trimpot on the PCB for zero beats between OSC1 Range 2 and OSC2 Range 8 Repeat step 8 with different settings of the RANGE knob and repeat steps 9 and 10 until both oscill...

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Behringer D A-440, User Support Bulletin

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