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QSC PTL-1

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Features

Within Q-SYS, a 22 kHz pilot tone (outside the audible range of human hearing and undetectable above the program material) is transmitted along each loudspeaker line. Q-SYS, knowing the impedance value of the PTL-1, is then able to easily detect any deviation in the impedance at 22 kHz.

Any significant drop below a predetermined impedance will signify that a short circuit has occurred, while any rise above signifies that an open circuit has occurred. Each failure scenario will then generate a time stamped event into the Q-SYS Event Log, which may then trigger alert messages if desired.
Additionally, the user can select whether the pilot tone is only generated during a scheduled maintenance check, or whether the tone is always active to provide real-time diagnostics on every zone.

  • Pilot tone detection on 70V or100V loudspeaker circuits using QSC DataPort and CXD platform amplifiers
  • Ceramic screw-down connector block
  • Fuse protects circuit against shorts
  • Versatile install adapter plate included
  • Fits most plenum-rated electrical boxes
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    Item #: PTL-1

    Description

    Pilot Tone Load for End-of-line monitoring of loudspeaker circuits

    Specifications

    Accessory

    Pilot Tone Load

    PTL-1

    PTL-1

    Q-Sys

    Features

    • Pilot tone detection on 70/100V

    loudspeaker circuits using QSC

    DataPort and CXD platform

    amplifiers

    • Ceramic screw-down connector

    block

    • Fuse protects circuit against

    excessive current

    • Versatile install adapter plate

    included

    • Fits most plenum rated electrical

    boxes

    The PTL-1 is a Q-Sys accessory that provides

    an end-of-line 22 kHz impedance soak for

    70/100V loudspeaker circuits. Used in

    combination with a QSC DataPort-equipped

    amplifier or CXD platform amplifier, the

    PTL-1 becomes a vital component for

    monitoring of a distributed loudspeaker line.

    Q-Sys monitors the integrity of a

    loudspeaker line by transmitting a 22 kHz

    pilot tone (outside the audible range of

    human hearing and undetectable amidst the

    program material) and continually sensing

    the impedance of the PTL-1 installed at the

    far end of the line.

    A significant drop in impedance will indicate

    a short circuit in the line, while an

    impedance rise will indicate a break or other

    open-circuit fault. With each detected

    failure, Q-Sys can generate a time-stamped

    entry in its Event Log and can be

    programmed to trigger an alert message.

    The operator can also choose when the pilot

    tone and monitoring is run; for example, on

    command during maintenance checks, or

    continuously for real-time diagnostics.

    Inputs 1

    Voltage 70/100V loudspeaker line

    Center Frequency 22 kHz

    Connector Ceramic screw-down

    Dimensions 3.3” x 3.3” x 1” (84 x 84 x 25 mm)

    Weight Approx. 0.06 lb (0.03 kg)

    Specifications:

    PTL-1 Spec Sheet 06/23/2014 please recycle

    © 2014 QSC Audio Products, LLC. All rights reserved. QSC and the QSC logo are registered trademarks of QSC Audio Products, LLC in the U.S. Patent and

    Trademark office and other countries.

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