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PICO AD145, Manual

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Summary of Contents for AD145

Page 1: ...SAFETY INSTRUCTIONS 5 POWERING 6 TECHNICAL SPECIFICATION 8 EQUALISATION CURVES 11 BLOCK DIAGRAM 12 CONNECTOR PANEL 13 CONNECTIONS 14 INPUT MODULE 16 OUTPUT MODULE 19 ADJUSTMENTS AND CALIBRATIONS 22 A...

Page 2: ...wed by AD148 edit mixer Based on AD146 two comprehensive left and right monitor modules have been added for editing purposes If a mic line module is included for commentary or voice over purposes its...

Page 3: ...eries metalwork thereby reducing its size and weight Facilities remain largely unchanged internally the microphone amplifier has been replaced with the one designed for AD146 and externally the mono r...

Page 4: ...Temperature check the meter glasses for condensation If the package has been in transit during cold weather leave the mixer for at least 12 hours to allow it to return to normal room temperature Any m...

Page 5: ...is switched off this also improves the noise performance and crosstalk Powering 48v phantom or 12v tonader may be selected before or after the microphone is connected to the module Module fix screws H...

Page 6: ...ly unit that is connected to the mains supply to drive the mixer it must be CONNECTED TO EARTH In certain types of malfunction or breakdown earthing provides a path of least resistance for electric cu...

Page 7: ...is the 0v connection and a voltage in the range 12v to 15v DC should be supplied to PIN 4 The power source should be capable of delivering approximately 400mA allowing some capacity for phantom power...

Page 8: ...7 THIS PAGE IS BLANK...

Page 9: ...m L R TRANSFORMER BAL 600R LOAD MONO TRANSFORMER BAL 600R LOAD 18dBm DIRECT OUT UNBALANCED 600R LOAD H PHONE UNBALANCED 600R LOAD TB SEND UNBALANCED 600R LOAD OUTPUT IMPEDANCE 60R L R MONO 20R DIRECT...

Page 10: ...Q 1 2 HPF PRE TRANSFORMER 12dB OCTAVE 3dB 150Hz 3dB 90Hz OUTPUT LIMITER THRESHOLD 8dB RATIO 7 1 ATTACK 2 SETTINGS INTERNALLY SWITCHABLE 1 4mS 2 0 8mS RELEASE 2 SETTINGS INTERNALLY SWITCHABLE 1 250mS 2...

Page 11: ...10 TECHNICAL SPECIFICATION MECHANICAL SIZE 6 I P 8 I P 10 I P 12 I P A 320 381 442 503 B 295 356 417 478 ALL DIMENSIONS IN MILLIMETRES WEIGHT 6 I P 8 I P 10 I P 12 I P 6 7 8 9 ALL WEIGHTS IN KILOGRAMS...

Page 12: ...URVES AD 245 HIGH AND LOW EQ 20 15 10 5 0 5 10 15 20 10 100 1000 10000 100000 FREQUENCY dB AD 245 MID EQ AND HPF 20 15 10 5 0 5 10 15 20 10 100 1000 10000 100000 FREQUENCY dB AD255 HIGH AND LOW EQ AD2...

Page 13: ...12 BLOCK DIAGRAM...

Page 14: ...talkback preset 4 Mic line input XLRs 5 Headphone monitor jack 6 External DC power input 7 Off On switch internal and external 8 Subsidiary connector 9 Stereo return jacks L R and calibration preset 1...

Page 15: ...nter clockwise From that point 20dB gain is available for lower level signals Unbalanced headphone monitor output appears on an A type stereo jack 5 This output is capable of driving 25R at 0dBu STERE...

Page 16: ...tput section The mixer leaves the factory with the DIL switch set in the MONO position A three position rocker switch BATT EXT 7 selects either internal batteries or an external DC source Power to the...

Page 17: ...hone power 2 Line input 3 Phase change 4 High pass filter 5 EQ selector 6 Auxiliary 1 selector 7 Auxiliary 2 selector 8 Panoramic potentiometer 10 PFL indicator LED 13 Input gain control 14 High frequ...

Page 18: ...ector switch 5 Because of the inherent inaccuracy of the centre detent mechanism it is not Audio Developments practice to fit such devices to equaliser amplitude controls HF 14 MF 15 LF 16 The auxilia...

Page 19: ...the input to the fader The Penny Giles fader 18 is calibrated 10dB from its fully open position allowing the operator to work with 10dB of gain in reserve Faders on adjacent modules can be coupled fo...

Page 20: ...nk 8 Limiter LEDs 9 Line up tone 6 Meter illumination 10 Output limiters 12 Direct or Return 11 1kHz or 10kHz 13 Left only 14 Right only Matrix 15 Monitor output level control 16 Mono output level con...

Page 21: ...ar each bar goes out in turn as the battery level falls When the internal or external voltage drops below a safe operating level the first segment of the battery level indicator will flash Meters may...

Page 22: ...no compatibility to be assessed on the left ear piece and out of phase components to be checked on the right ear piece When working entirely in the M S domain the matrix will transform the mixer outpu...

Page 23: ...nt of the indicator bar reading in relation to the signal level being measured All other aspects of the meter specification are taken care of within the software and fixed values within the circuit co...

Page 24: ...ixer to give a level of 0dBu at L output Then select the limiter function and adjust VR5 until the output signal starts to fall typically 0 2dB The DC voltage at PIN 8 of IC 2 should be approximately...

Page 25: ...alified engineer CHARGING If nickel cadmium cells are fitted in an AD255 series mixer they may be recharged in situ from AD100 015 power supply whether the mixer is in use or not Maximum current is se...

Page 26: ...25 CUSTOMER NOTES AND FACTORY MODIFICATION...

Page 27: ...26 TECHNICAL LIBRARY...

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