SPL Channel One 2950 Manual Download Page 27

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Diagram 3 displays various cut
and boost settings of the MHF
filter at 3 kHz.

The proportional-Q characteristic
is distinctly visible.

Diagram 4 displays the curves
of the LMF filter.

Various cut and boost settings
at 150 Hz.

Again the proportional-Q char-
acteristic is clearly visible.

Channel One

Mid-Hi Filter, Low Filter

Measurements

Summary of Contents for Channel One 2950

Page 1: ...Manual Channel Strip Channel One Model 2950...

Page 2: ...40 Fax 49 0 2163 983 420 E Mail info spl info Internet www spl info The construction of the Channel One Model 2950 is in compliance with the stan dards and regulations of the European Community Notes...

Page 3: ...UCTION SPL De Esser technology 13 Insert 14 Compressor Limiter ON LIMIT 14 COMPRESSION MAKE UP GAIN NOISE GATE 15 SPL compressor technology 16 Equalizer ON EQ PRE COMP 17 LMF LMF MHF MHF Recommendatio...

Page 4: ...ample near a wash basin or bath in a damp cellar near swimming pools or the like In such cases there is an extremely high risk of fatal electrical shocks Insertion of foreign objects or fluids Never a...

Page 5: ...s Be sure that any service technician uses original replacement parts or those with identical specifications as the originals Incorrectly substituted parts can lead to fire electrical shock or other d...

Page 6: ...upported And more time remains for the creative tasks From the outset great value was placed on high flexibility An example are the three separate inputs for microphone line signals or instruments eac...

Page 7: ...OPTIONS GND LIFT GND LIFT GND GND LIFT VOLTAGE FUSE VOLTAGE FUSE X L R W I R I N G PIN 1 GND PIN 2 HOT PIN 3 COLD T R S J A C K W I R I N G TIP LEFT RING RIGHT SLEEVE GND CONNECTOR WIRING Sound Perfo...

Page 8: ...in ground potentials between driver and receiver would produce disturbances In balanced connections a reference signal with reversed polarity is transmitted additionally to the audio signal through a...

Page 9: ...tch on the front panel Please read the important notes in chapters 48V and Activating phantom power on page 11 The microphone input can also be equipped with an optional input transformer see page 29...

Page 10: ...r is 12dBu 0 dBFS PLAYBACK INPUTS The playback signal is connected to the unbalanced PLAYBACK INPUTS to create a head phone moni toring mix If a mono playback signal is available only the LEFT connect...

Page 11: ...PHANTOM POWER ALSO WHEN CHANGING MICROPHONES THE INPUT STAGE OF THE CHANNEL ONE CAN BE DAMAGED IF YOU IGNORE THESE PROCEDURES 1 Connect the microphone to the Channel One 2 Now activate phantom power...

Page 12: ...n connected regardless of which input is selected You can choose the line input as source as long as the instrument input is not being used INSTRUMENT The INSTRUMENT input jack is placed on the front...

Page 13: ...of operation has distinct advantages because it is unobtrusive and helps retain the original tonal quality Compressor typical side effects such as lisping or nasal tones do not occur Finally its opera...

Page 14: ...shows the processing intensity see GAIN REDUCT on page 23 Usually the signal flow follows the design of the Channel One and for this reason the input signal normally arises from the de esser or when...

Page 15: ...eration of the subsequent recording system MAKE UP GAIN With the MAKE UP GAIN control you can restore the overall level reduction caused by compression or limiting With assistance of the GAIN REDUCT d...

Page 16: ...ignal as far as possible Overall this technique provides the optimal solution between fast unobtrusive control response and the least distortion of the audio signal The result is a natural and transpa...

Page 17: ...n the switch is pressed the equalizer operates in front of the compressor limiter when not pressed the succession remains unchanged This function permits very flexible operation with the Channel One w...

Page 18: ...f bass emphasized instru ments during recording or subsequently when mixing etc MHF The center frequency of the semi parametric mid high frequency filter is set with the MHF control The frequency rang...

Page 19: ...the equalizer so that the newly created spectrums can also be processed with the EQ A more or less over driven field effect transistor forms a part of the distortion circuitry It s characteristic cur...

Page 20: ...T display does not show any values An instance of a sensible application could possibly be when the output signal of the Channel One together with the playback signal are reproduced via the studio mon...

Page 21: ...o that of the OUTPUT control or MUTE switch which means the volume in the headphones does not alter although the output value of a modula tion has changed TIP When working with hard disc systems or di...

Page 22: ...e EQ and behind the output control All possible causes for overload can be directly checked overdriven microphone instrument line gain an excessive make up value in the compressor limiter too much boo...

Page 23: ...f the AD converter and on page 29 Although the values of the PPM OUTPUT display only cover up to 12 dB sufficient headroom remains internally approximately 6 dB so that the output value can exceed thi...

Page 24: ...kHz 80 dB 10 kHz 78dB 0dBu LINE IN only THD N Gain A weighted 5dB 99 4 dBu 20 dB 97 2 dBu 42 dB 79 4 dBu Input impedance Line 20 kOhm Instrument 1 MOhm Maximum input level Line 22 dBu Instrument 14dBu...

Page 25: ...25 Channel One Block diagram...

Page 26: ...and output Curve B shows the curve charac teristics of the compressor The soft knee characteristic is clearly visible Curve C portrays the limiter s curve characteristics Diagram2 shows various cut an...

Page 27: ...r at 3kHz The proportional Q characteristic is distinctly visible Diagram 4 displays the curves of the LMF filter Various cut and boost settings at 150Hz Again the proportional Q char acteristic is cl...

Page 28: ...Copy master recall settings Artist Album Gig Title Engineer Track s Groups Date...

Page 29: ...synchronization The yellow Sync Lock LED illuminates when a valid sync signal is present at the SYNC INPUT and the converter is automatically synchronized to the external sample rate To prevent inter...

Page 30: ...Manual Channel One Model 2950...

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