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MANUAL
DIGITAL AUDIO-ROUTER

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Summary of Contents for Funk Tonstudiotechnik PAS-8

  • Page 1 MANUAL DIGITAL AUDIO-ROUTER...
  • Page 2: Table Of Contents

    CONTENTS __________________________________________________________________________________ PLEASE NOTE page INTRODUCTION page 4..5 OPERATION page AUDIO FORMAT AND CONFIGURATION page INPUT CONFIGURATION page AUDIO SIGNAL QUALITY page POWER SUPPLY page OPTIONAL VERSIONS AND ACCESSORIES page CABLING AND SIGNAL DISTRIBUTION page 11..12 PIN ASSIGNMENT page 9..10 BLOCK CIRCUIT DIAGRAM page MEASUREMENT GRAPHS FOR JITTER SPECTRUM...
  • Page 3: Please Note

    When the device is brought from a cold into a warm environment, water may condense in the interior, and there is a risk of malfunction. Do not turn on the device for thirty minutes after such a temperature change in order to allow the PAS-8 to assume the temperature of the environment. CLEANING: Use a soft cloth slightly moistened with a mild soap solution for cleaning the casing, the front panel, and the controls.
  • Page 4 AES/EBU interfaces and various peripheral devices. All inputs and outputs have XLR jacks with gold-plated contacts. The PAS-8 is not a format converter. However, it accepts the commonly used SPDIF signal levels. The signal output is at the usual AES/EBU level of 4 Vss (peak to peak).
  • Page 5 The router's active circuitry ensures low jitter, which makes the device suitable for use before a D/A converter in the signal chain. In order to improve the operation of a subsequent converter, the output amplifiers of the PAS-8 come with DUTY CYCLE correction. This ensures a DC-free output signal irrespective of the signal level and duty cycle (mean time ratio of positive and negative bits) of the selected source, in addition to reducing potential jitter caused by the low-pass effect of a connected line.
  • Page 6: Operation

    CLOCK DISPLAY: These two LEDs indicate the presence of a digital signal with a valid input level at the selected PAS-8 input. For instance, if an input with a valid digital signal is selected for the monitor matrix, the relevant MON.CLK...
  • Page 7: Audio Format And Configuration

    In order to send a signal not only to the digital switch but also to a second digital recipient, the jumper for the relevant input is opened in the router. The signal line is routed from the source to the PAS-8 first, then to the second recipient.
  • Page 8: Input Configuration

    The jumpers for input impedance selection can be reached by opening the device cover. If the jumper is on both contacts, input impedance is 110 Ω. If the jumper is on only one contact, the input impedance is >1 kΩ. The PAS-8 has 8 jumpers for its 8 inputs and an additional jumper for the digital insert input.
  • Page 9: Audio Signal Quality

    30/70 (uppermost line of the readings). The signal level is approx. 3.5 Vss. The lower, blue curve shows the PAS-8's corrected, clean output signal with a symmetrical duty cycle of typically 50 % (lines 2 to 5 of the readings). The diagram also shows the accurately defined, overshoot-free rise and fall times as well as the delay between input and output.
  • Page 10: Power Supply

    50 mA/250 V, anti-surge. OPTIONAL VERSIONS and ACCESSORIES The PAS-8 is available in two versions for different supply voltages: 230 V/50 Hz, or 115 V/50..60 Hz. Only the manufacturer may convert the device for a different power supply. ACCESSORIES – INTERFACE In the pack panel of the digital audio router there is a 4-pole mini DIN socket labelled PAS REMOTE.
  • Page 11 3 and 1 of the XLR plug. If there is a risk of a ground loop forming between the sending device and PAS-8, then pin 1 should not be connected. The shield of the unbalanced signal source will be terminated on pin 3 of the XLR input in this case.
  • Page 12 4 digital recipients. As an example, the following figure illustrates the use of a DDA-12 distribution amplifier in conjunction with the PAS-8. This configuration allows any recipient to record signals from any source. The switching options of the DDA-12 permit the signal to be routed to input 2 of the DDA-12 instead of the D/A converter or the digital peakmeter.
  • Page 13: Block Circuit Diagram

    PAS-8 BLOCK DIAGRAM...
  • Page 14: Measurement Graphs For Jitter Spectrum

    (mean time ratio of positive and negative bits) of the selected source, in addition to reducing potential jitter caused by the low-pass effect of a connected cable. The figures below show jitter measurements for the PAS-8 and the AMS-2 DAR and illustrate the extremely low jitter in the signal processing. Fig. 1:...
  • Page 15: Technical Specifications

    TECHNICAL SPECIFICATIONS PAS-8 __________________________________________________________________________________________________________________ Number of inputs :......... 8 Inputs 1 Insert return Number of outputs : ........2 Monitor 2 Record 1 Insert send Connector inputs: .......... XLR female gold-plated contacts Connector outputs: ........XLR male gold-plated contacts Digital format : ..........AES/EBU / AES-3 [also SPDIF with adapter plug] (transparent for all formats) Sampling frequency :........
  • Page 16: Electromagnetic Interference

    ELECTROMAGNETIC INTERFERENCE ____________________________________________________________________________________________________ ELECTROMAGNETIC INTERFERENCE and EMC This device complies with the EMC requirements as defined in the directives 89/336/EEC and FCC part 15: The device's electromagnetic emissions are sufficiently low to not interfere with the intended use of other devices and systems.
  • Page 17: Maintenance And Repair

    MAINTENANCE AND REPAIR ____________________________________________________________________________________________________ SAFETY Only qualified service personnel following all applicable rules and regulations may perform any work inside the device. Turn off the device and disconnect the power supply before removing any part of the housing. When performing maintenance work on an open device under mains voltage, be careful not to contact any bare parts of the circuit or metal semiconductor housings either directly or with a non-insulated tool.
  • Page 18: Ce Declaration Of Conformity

    PLEASE NOTE ____________________________________________________________________________________________ CE DECLARATION OF CONFORMITY FUNK TONSTUDIOTECHNIK 10997 BERLIN hereby declares and warrants that the product PAS-8 is compliant with the following standards according to EU Directives and their amendments: Safety: Protection acc. to EN60950; 1992 + A1/A2; 1993 (UL1950)

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