Clear-Com PTX-3 Instruction Manual
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Clear-Com PTX-3 Instruction Manual

Clear-Com PTX-3 Instruction Manual

Uhf digital hybrid ifb transmitter
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CLEAR-COM WIRELESS IFB
PTX-3
UHF DIGITAL HYBRID IFB TRANSMITTER
INSTRUCTION MANUAL

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Summary of Contents for Clear-Com PTX-3

  • Page 1 CLEAR-COM WIRELESS IFB PTX-3 UHF DIGITAL HYBRID IFB TRANSMITTER INSTRUCTION MANUAL...
  • Page 2 Room 1806, Hua Bin Building No. 8 Yong An Dong Li Jian Guo Men Wai Ave Chao Yang District Beijing, P.R. China 100022 ® Clear-Com, CellCom/FreeSpeak and the Clear-Com Communication Systems logo are registered trademarks of The Vitec Group plc.

  • Page 3: Table Of Contents

    PTX-3 Front Panel........1-6...
  • Page 4 Liability ..........W-iii Vitec Group Communications PTX-3 UHF Digital Hybrid IFB Transmitter...
  • Page 5 When you see these symbols on this product, they warn you of the potential danger of electric shock if the station is used improperly. They also refer you to important operating and maintenance instructions in the manual. Vitec Group Communications PTX-3 UHF Digital Hybrid IFB Transmitter...
  • Page 6 A separation distance of at least 20cm (8 inches) must be maintained to comply with the FCC Radio Frequency Maximum Permissible Exposure (MPE) requirements. Vitec Group Communications PTX-3 UHF Digital Hybrid IFB Transmitter...

  • Page 7: Introduction

    GENERAL TECHNICAL DESCRIPTION INTRODUCTION The PTX-3 adds DSP capability and a convenient LCD interface to this popular IFB transmitter, with the same physical size and interface capabilities. The PTX-3 also offers new features such as selectable LF roll-off and compatibility with some other popular brands.

  • Page 8: Digital Hybrid Technology

    While the XLR input does not offer phantom power, it is fully compatible with standard 48 Volt phantom power. Phantom supplied microphones may be connected to the PTX-3 without the need for DC isolation. A user-selectable low frequency roll-off can be set for 35 Hz or 50 Hz.

  • Page 9: Input Limiter

    RF signals on the carrier frequency of the system will not open the squelch on the receiver. When the PTX-3 is operated in compatibility modes other than IFB, it generates pilot tones as appropriate for the chosen mode. FREQUENCY AGILITY The PTX-3 transmitter uses a synthesized, frequency selectable main oscillator.

  • Page 10: Power Delay

    TRANSMITTER The PTX-3 transmitter operates at 250 mW to ensure a clean signal free of dropouts and noise. All transmitter circuits are buffered and filtered for excellent spectral purity. The clean RF signal reduces the chances for interference in multiple transmitter installations.

  • Page 11: Mode Switches

    Table 1-1: Mode Switches POWER INPUT CONNECTOR The PTX-3 is designed to be used with the CH20 external (or equivalent) power source. The nominal voltage to operate the unit is 12 VDC, although it will operate at voltages as low as 6 VDC and as high as 18 VDC.

  • Page 12: Antenna

    When power is first turned on, the front panel LCD display steps through the following sequence. 1. Displays Model and frequency block number (e.g. PTX-3 BLK 25). 2. Displays installed firmware version number (e.g. VERSION 1.0). 3. Displays the current compatibility mode setting (e.g. COMPAT IFB).

  • Page 13: Main Window

    MHz, as well as the standard hex code for use with transmitters equipped with hex switches. Also displayed is the UHF television channel to which the selected frequency belongs. Figure 1-6: Frequency Window Vitec Group Communications 1 - 7 PTX-3 UHF Digital Hybrid IFB Transmitter...

  • Page 14: Audio Input Gain Window

    Pressing the MENU button once from the Audio Input Gain window navigates to the Setup window. This window contains a menu which permits access to various setup screens. 1 - 8 Vitec Group Communications PTX-3 UHF Digital Hybrid IFB Transmitter...

  • Page 15: Rolloff Setup Screen

    ROLLOFF SETUP SCREEN The ROLLOFF setup screen controls the low frequency audio response of the PTX-3 by moving the 3 dB corner of a 4 pole lowpass digital filter. The 50 Hz setting is the default, and should be used whenever wind noise, HVAC rumble, traffic noise or other low frequency sounds may degrade the quality of the audio.

  • Page 16: Compat Setup Screen

    400 - Compatibility mode for some non Clear-Com equipment. 100 - Compatibility mode for some older non Clear-Com equipment. 200 - Compatibility mode for some older non Clear-Com equipment. MODE 3 and MODE 6 - Compatible with certain non Clear-Com receivers. Figure 1-10: Compatibility Setup Screen Press MENU to return to the Setup window.
  • Page 17 Note: The TUNING Setup Screen only selects the tuning mode (NORMAL or Group tuning) and not the operating frequency. Actual operating frequencies are chosen through the Frequency Window. Press MENU to return to the Setup window. Vitec Group Communications 1 - 1 1 PTX-3 UHF Digital Hybrid IFB Transmitter...

  • Page 18: Frequency Window Behavior, Based On Tuning Mode Selections

    (A through D), the MENU+Up and MENU+Down shortcuts jump to the first and last frequencies in the group. In user groups (U and V), MENU+Up and MENU+Down permit access to frequencies not already in the group. 1 - 1 2 Vitec Group Communications PTX-3 UHF Digital Hybrid IFB Transmitter...

  • Page 19: User Programmable Frequency Group Behavior

    INSTALLATION AND OPERATION 1. The PTX-3 transmitter is shipped with pin 1 of the XLR input connector tied directly to ground. If a floating input is desired, a Ground Lift Jumper is provided. This jumper is located inside the unit on the PC board near the rear panel XLR jack.
  • Page 20 Ground Lift Jumper to the desired location. Figure 1-13: Jumper in Ground Position Figure 1-14: Jumper in Lift Position Figure 1-15: PTX-3 Ground Lift Jumper 2. Set the MODE switches on the rear panel to match the specific input source to be used. (See MODE Switches.) 3.

  • Page 21: Operating Notes

    The AUDIO LEVEL control should not be used to control the volume of the associated receiver. This gain adjustment is used to match the PTX-3 input level to the incoming signal from the sound source to provide full modulation and maximum dynamic range, not to set the volume of the associated receiver.
  • Page 22 Adjust output level on receiver to the correct level for the headset or earphone. 3. Excessive wind noise or breath “pops”. Reposition microphone and/or use a larger windscreen. 1 - 1 6 Vitec Group Communications PTX-3 UHF Digital Hybrid IFB Transmitter...

  • Page 23: Frequency Blocks And Ranges

    The table below lists the factory designated frequency ranges available for the PTX-3 Transmitter. Each PTX-3 transmitter is built to cover a pre-selected range of frequencies (a “block”) as shown below. The transmitter will tune to any of 256 different frequencies within this factory assigned block (except blocks 23 and 944).
  • Page 24 Part of block 23 is not used since it covers a 608 to 614 MHz band that is allocated exclusively for use in radio astronomy. 1 - 1 8 Vitec Group Communications PTX-3 UHF Digital Hybrid IFB Transmitter...
  • Page 25 200 Mode, 400 Mode step selected, 32.768kHz Mode 6 Modulation: FM, ±20 kHz deviation IFB & 100 Mode, ±75kHz 200 & 400 Mode, ±50kHz Mode 3 and Mode 6 Vitec Group Communications 2 - 1 PTX-3 UHF Digital Hybrid IFB Transmitter...
  • Page 26 Standard XLR female connector Input Power: 12 to 14 VDC typical, 200 mA max; Max input range 6 to 18 VDC Power Input Jack: Coax type, locking LZR RL26AE 2 - 2 Vitec Group Communications PTX-3 UHF Digital Hybrid IFB Transmitter...
  • Page 27 FCC Radio Frequency Maximum Permissible Exposure (MPE) requirements. Notice About Specifications While Clear-Com makes every attempt to maintain the accuracy of the information contained in its product manuals, that information is subject to change without notice. Performance specifications included in this manual are design-center specifications and are included for customer guidance and to facilitate system installation.
  • Page 28 2 - 4 Vitec Group Communications PTX-3 UHF Digital Hybrid IFB Transmitter...

  • Page 29: Warranty Period

    • UHF wireless intercom systems have a limited warranty of three years. • All other Clear-Com and Drake brand systems and products, including beltpacks, have a limited warranty of two years. The warranty starts at the time of the product’s original purchase. The...
  • Page 30 Telephone for Europe, Middle East and Africa: +49 40 6688 4040 or +44 1223 815000 Telephone for the Americas and Asia: +1 510 337 6600 Email: vitec.support@AVC.de Once the standard warranty period has expired, the User Support Center will continue to provide telephone support if you have purchased an Extended Warranty.
  • Page 31 purchase of an extended warranty extends to five years the warranty of any product offered with a standard two-year warranty. The total warranty period will not extend beyond five years. Note: VGC does not offer warranty extensions on UHF wireless intercom systems, or on any product with a 1-year or 90-day warranty.
  • Page 32 Vitec Group Communications Warranty...

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