Shure sr 109 service manual

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SR109 Professional Mixer SPECIFICATIONS Equipment Type . . . . . . . All silicon transistor mixer/pre- amplifier Number of lnput Channels . . . . . . 8 Power Output . . . . . . . . . +19 dBm (program line level) Voltage Gain * Program . . . . . . .87 -13 dB MIC input to LlNE - LEVEL out 37 -+3 dB LlNE input to LlNE LEVEL out 37 -13 dB MIC input to MIC LEVEL out Headphones . . . .69 -13 dB MIC input to PHONES out Link . . . . .. . . . . .54.5 k3 dB MIC input to LlNK OUTPUT (with 600-ohm termi- nation) 27 k2 dB LlNK INPUT to LlNE LEVEL output Accessory . . . . . .59 t3 dB MIC input to ACCES- SORY output (via pins 1-8/IN- PUTS) 54.5 k3 dB MIC input to AC- CESSORY output (via pin 9/PROGRAM) (terminated with 600 ohms) Frequency Response . . . k3 dB, 20 Hz-20 kHz (150-ohm source; 600-ohm load) lnput Sensitivity . . . . . . .0.1 mV max. for +4 dBm program output Distortion . . . . . . . . . . . .THD less than 1% at +12 dBm, 30 Hz-20 kHz; IM distortion less than 1% at +12 dBm Noise (300 Hz-20 kHz) . . . . . - 128 dBV (equivalent input noise at full gain) -72.8 dBm output noise (MAS- TER Volume Control down) -38.8 dBm output noise (MAS- TER and one channel Volume Control up) Hum and Noise (20 Hz-20 kHz) . . . . . . - 125 dBV (equivalent input hum and noise at full gain) -61.8 dBm output noise (MAS- TER Volume Control down) -34.8 dBm output noise (MAS- TER and one channel Volume Control up) Signal to Noise (20 Hz-20 kHz) . . . . . .Typically 83 dB at maximum out- put with one channel Volume Control and MASTER Volume Control set at 8 (approximate- ly 58 dB gain) lnput Attenuation . . . . . . 0, 15 dB (switch-selected) lnput Clipping Level at 1 kHz: MIC lnput . . . . . . . . 100 mV (ATTENUATOR out; Ch. Volume at 2) 4.5 mV (ATTENUATOR out; Ch. Volume at 12) 0.56V (ATTENUATOR in; Ch. Volume at 2) 25 mV (ATTENUATOR in; Ch. Vol- ume at 12) LlNE lnput . . . . . . . .33V (ATTENUATOR out; Ch. Vol- ume at 2) 1.35V (ATTENUATOR out; Ch. Volume at 12) 90V (ATTENUATOR in; Ch. Vol- ume at 2) 8.OV (ATTENUATOR in; Ch. Vol- ume at 12) lnput Common Mode Rejection . . . . .I00 dB at 100 Hz Low-Frequency Equalization . . . . . . . . 213 dB at 100 Hz with respect to 0 (flat) setting High-Frequency Equalization . . . . . . . . 212 dB at 10 kHz with respect to 0 (flat) setting Tone Oscillator . . . . . . . . 1 kHz; less than 1% distortion; variable level lnput Impedance at 1 kHz: Microphone . . . .2.1 kilohms balanced (for use with 25- to 600-ohm microphones) Line (channels 7 and 8) . . . . . . . . . 66 kilohms balanced bridging Link lnput . . . . . .35 kilohms unbalanced Output Impedance: Program . . . . . . . Balanced line level: 120 ohms ac- tual (for use with 25- to 600- ohm inputs) Microphone level: 0.5 ohms ac- tual (for use with 25- to 600- ohm inputs) 'Measurement conditions: MIC input through 150 ohms, LINE input through 33 kilohms LINK INPUT through 600 ohms PROGRAM LlNE LEVEL terminated in 600 oh&, PROGRAM MIC LEVEL terrhinated in 150 ohms, PHONES termi- nated in 8 ohms: MASTER Volume, Channel Volume and PHONES Controls full up; all other controls and switches 0 or out.

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SR109 Professional Mixer SPECIFICATIONS Headphones ... .3.5 ohms actual (for use with 4- to 16-ohm headphones) Link .......... .600 ohms (actual) Accessory ...... Unbalanced aux level: 33 ohms actual (for use with 4K or higher loads) Limiter Threshold (adjustable) ..... .Typically -20 to +20 dBm (at LlNE LEVEL output) Range ............ .Approximately 30 dB Link Jack System ...... External signal conditioning out- put/input; high-level auxiliary amplifier and tape recorder sig- nal output; multiple Mixer con- nection (common mix); remote master volume control VU Meter Calibration ... 0, f4, +8 dBm, switch-select- able (0.775, 1.23, 1.95 Vrms) at 1 kHz to 600-ohm load. [VU RANGE Switch in 0 position provides 0 VU reading of 0 dBm (0.775 Vrms) to 600-ohm load1 .... Phasing (polarity) .Pin 3 of INPUT connectors in phase with pin 9 of ACCESSO- RY OUTPUT, tips of LINK OUTPUT and PROGRAM LlNE LEVEL OUTPUTS, and pin 3 of PROGRAM LlNE LEVEL and MIC LEVEL OUTPUTS (PHASE Switch in 0" position). Pins 1-8 of ACCESSORY OUTPUT out of phase with the above. ......... Phase Switch Output polarity-reversing switch (0°, 180') (reverses phase of all program outputs) ......... 30 Vdc Bus .Pin 10 on ACCESSORY OUTPUT connector is regulated +30 k3.5 Vdc supply; pin 11 is ground (earth). May be used to power accessories up to 50 mA. .... Operating Voltage .90-132 Vac, 50/60 Hz (SR109) 90-132, 180-250 Vac, 50/60 Hz (SR109-2E) Power Consumption ... 20 watts max. (Mixer only). 500 watts max. (SWITCHED AC re- ceptacle) (SR109 only) Temperature Range: ...... Operating -7O to 54OC (20' to 130°F) ....... Storage .-29O to 71°C (-20' to 160°F) ......... Dimensions.. 133 mm H x 483 mm W X 232 mm D (See Page 4.) (51/4 in. x 19 in. x 9% in.) Installation ........... Equipped for standard 19 in. (483 mm) rack mounting; 5% in. (133 mm) height; may be oper- ated in accessory A105A Car- rying Case or in custom control center. ............... Weight 7.7 kg (17 Ib) ................ Finish Matte black, with beige write-on trim strip ......... Certifications Listed by Underwriters' Labora- tories, Inc.; listed by Canadian Standards Association as cer- tified (SR109 only)