Clear-Com PTX-3 Bedienungsanleitung

PTX-3

UHF DIGITAL HYBRID IFB TRANSMITTER

INSTRUCTION MANUAL

CLEAR-COM WIRELESS IFB

PTX-3 UHF Digital Hybrid IFB Transmitter Instruction Manual

Part Number 810401Z Rev. 2

Vitec Group Communications LLC

850 Marina Village Parkway

Alameda, CA 94501

U.S.A

Vitec Group Communications Ltd

7400 Beach Drive

IQ Cambridge

Cambridgeshire

United Kingdom

CB25 9TP

Vitec Group Communications

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.

Vitec Group Communications

PTX-3 UHF Digital Hybrid IFB Transmitter i

CONTENTS

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

Digital Hybrid Technology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

Audio Input Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

Input Limiter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

DSP Compatibility Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

Pilot Tone Squelch System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

Frequency Agility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

Power Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

Microcontroller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

Antenna System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

Rear Panel Controls and Functions . . . . . . . . . . . . . . . . . . . . . . . . .1-4

XLR Jack. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

Mode Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5

Power Input Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5

Antenna. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6

Front Panel Controls and Functions. . . . . . . . . . . . . . . . . . . . . . . . .1-6

PTX-3 Front Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6

OFF/TUNE/XMIT Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6

Power Up Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6

Main Window. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7

Frequency Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7

Audio Input Gain Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8

Setup WIndow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8

Rolloff Setup Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9

COMPAT Setup Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10

TUNING Setup Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10

Frequency Window Behavior, based on TUNING mode selections .

1-12

User Programmable Frequency Group Behavior . . . . . . . . . . . .1-13

Adding/Deleting User Programmable Frequency Group Entries 1-13

Installation and Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-13

Operating Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-15

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-15

Frequency Blocks and Ranges. . . . . . . . . . . . . . . . . . . . . . . . . . . .1-17

Warranty Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .W-i

Technical Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .W-i

Vitec Group Communications

PTX-3 UHF Digital Hybrid IFB Transmitter

Warranty Repairs and Returns . . . . . . . . . . . . . . . . . . . . . . . . . . . . W-ii

Non-Warranty Repairs and Returns . . . . . . . . . . . . . . . . . . . . . . . . W-ii

Extended Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . W-ii

Liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . W-iii

Vitec Group Communications

PTX-3 UHF Digital Hybrid IFB Transmitter i

IMPORTANT SAFETY INSTRUCTIONS

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with dry cloth.

7. Do not block any ventilation openings. Install in accordance with the

manufacturer’s instructions.

8. Do not install near any heat sources such as radiators, heat

registers, stoves, or other apparatus (including amplifiers) that

produce heat.

9. Only use attachments/accessories specified by the manufacturer.

10. Use only with the cart, stand, tripod, bracket, or table specified by

the manufacturer, or sold with the apparatus. When a cart is used,

use caution when moving the cart/apparatus combination to avoid

injury from tip-over.

11. Unplug this apparatus during lightning storms or when unused for

long periods of time.

12. Refer all servicing to qualified service personnel. Servicing is

required when the apparatus has been damaged in any way, such

as power-supply cord or plug is damaged, liquid has been spilled or

objects have fallen into the apparatus, the apparatus has been

exposed to rain or moisture, does not operate normally, or has been

dropped.

13. WARNING: To reduce the risk of fire or electric shock, do not

expose this product to rain or moisture.

Please familiarize yourself with the safety symbols in Figure 1.

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.

Please read and follow these

instructions before operating

this product.

Vitec Group Communications

PTX-3 UHF Digital Hybrid IFB Transmitter

Figure 1: Safety Symbols

SAFETY

Emission designator: 180KF3E

The T4 IFB transmitter is FCC type accepted under Part 74: 470 -

608MHz, 614 - 806MHz and 944.1 - 951.9MHz.

The FCC requires that the following statement be included in this

manual:

This device complies with FCC radiation exposure limits as set

forth for an uncontrolled environment. This device should be

installed and operated so that its antenna(s) are not co-located or

operating in conjunction with any other antenna or transmitter. A

separation distance of at least 20cm (8 inches) must be

maintained to comply with the FCC Radio Frequency Maximum

Permissible Exposure (MPE) requirements.

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

This symbol alerts you to the presence of uninsulated dangerous

voltage within the product's enclosure that might be of sufficient

magnitude to constitute a risk of electric shock. Do not open

the product's case.

This symbol informs you that important operating and main-

tenance instructions are included in the literature accompanying

this product.

Vitec Group Communications

PTX-3 UHF Digital Hybrid IFB Transmitter 1-1

GENERALTECHNICAL

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.

The features include a graphics type backlit LCD display with a menu

system. The PTX-3 can be “Locked” to prevent a user from changing

any settings but still allow browsing of the current settings.

Figure 1-1: PTX-3 Digital Hybrid IFB Transmitter

The transmitter can be powered from any external DC source of 6 to

18 Volts at 200 mA maximum or from the provided 12 Volt power

supply with a locking power connector. The unit has an internal

self-resetting fuse and reverse polarity protection.

The PTX-3 is housed in a machined aluminum case with a tough

electrostatic powder coating. The front and rear panels are anodized

aluminum with laser etched engraving. The included antenna is a right

angle, ¼ wavelength monopole with a BNC connector, constructed of

polymer coated flexible steel cable.

These features, along with 250 milliwatt RF output power and a wide

range of selectable audio input types and levels, make the PTX-3 an

excellent choice for IFB and other applications where extended

operating range is required.

Vitec Group Communications

PTX-3 UHF Digital Hybrid IFB Transmitter

1-2

DIGITAL HYBRID TECHNOLOGY

The PTX-3 features Digital Hybrid Wireless* technology for

compatibility with some other brands of receivers. The Digital Hybrid

system in the PTX-3 overcomes channel noise and compandor

artifacts in a dramatically new way, digitally encoding the audio in the

transmitter and decoding it in the receiver, yet still sending the

encoded information via an analog FM wireless link. This proprietary

algorithm is not a digital implementation of an analog compandor, but a

technique which can be accomplished only in the digital domain.

Figure 1-2: PTX-3 Block Diagram

AUDIO INPUT INTERFACE

The standard 3 pin XLR connector on the rear panel handles all audio

inputs. The four DIP switches allow setting the input sensitivity for low

levels, such as microphone inputs, or for high levels, such as line

inputs, balanced or unbalanced. The switches also offer special

settings to provide the proper input configurations to match to Clear

Com, RTS1, and RTS2 intercom systems. Pin 1 of the XLR input

connector is normally connected to ground but an internal jumper can

be moved if a floating input is desired.

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.

The recommended 50 Hz default setting helps to remove wind and

traffic noise, air conditioner rumble, and other sources of undesiredlow

frequency audio. The 35 Hz setting offers a fuller range of sound in the

absence of adverse conditions.

Vitec Group Communications

PTX-3 UHF Digital Hybrid IFB Transmitter 1-3

INPUT LIMITER

A DSP controlled analog audio limiter is employed before the

analog-to-digital converter. The limiter has a range of more than 30 dB

for excellent overload protection. A dual release envelope makes the

limiter acoustically transparent while maintaining low distortion. It can

be thought of as two limiters in series: a fast attack and release limiter

followed by a slower attack and release limiter. The dual release limiter

recovers quickly from brief transients but recovers more slowly from

sustained high levels, keeping audio distortion low while preserving

short term dynamic changes. When the audio meter on the LCD

display widens slightly as it reaches zero, limiting is indicated. When

the zero changes to a letter C, severe limiting and/or clipping is

indicated.

DSP COMPATIBILITY MODES

As a DSP based design, compatibility with a variety of different analog

and digital hybrid receivers is possible. The primary noise reduction in

the IFB system is a single band compandor with pre-emphasis.

When the PTX-3 is configured for compatibility with other types of

wireless systems; the DSP emulates the appropriate audio processing

and companding for the chosen mode.

PILOT TONE SQUELCH SYSTEM

Clear-Com IFB systems use a special “pilot tone” so that valid IFB

signals can be distinguished from RF interference. During normal

operation, an IFB receiver will listen for the distinctive pilot tone,

remaining silent (squelched) until the pilot tone is detected. The pilot

tone is located well above audio frequencies and is never passed

through to the receiver’s audio output.

The benefit of the pilot tone squelch system is that the receiver will

remain muted until it receives an RF carrier strong enough for good

reception and the pilot tone from the matching transmitter. Even strong

interfering 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. The frequency is extremely stable over a wide temperature

range and over time. The transmitter’s standard tuning range covers

256 frequencies in 100 kHz steps over a 25.6 MHz band. This flexibility

significantly helps avoid interference problems in mobile or traveling

applications.

Vitec Group Communications

PTX-3 UHF Digital Hybrid IFB Transmitter

1-4

POWER DELAY

When powering the transmitter on and off, and when switching

between the XMIT and TUNE modes, intelligent circuitry adds brief

delays in order to allow time for circuits to stabilize, both locally and in

the matching receiver. These delays prevent clicks, thumps and other

transients in the audio.

MICROCONTROLLER

The microcontroller oversees most system operations, including RF

frequency and output, DSP audio functions, buttons and display, and

more. User settings are stored in non-volatile memory, so they are

retained even when the power is turned off.

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.

ANTENNA SYSTEM

The included antenna is a right angle, ¼ wavelength monopole with a

BNC connector. It is constructed of polymer coated flexible steel cable.

The PTX-3’s 50 Ohm BNC output connector also works with a variety

of remote antennas for installation in studios and production trucks &

vans.

REAR PANEL CONTROLS AND FUNCTIONS

Figure 1-3: PTX-3 Rear Panel

XLR JACK

A standard XLR female jack accepts a variety of input sources

depending on the setting of the rear panel MODE switches. XLR pin

functions can be changed to suit the source depending on the

Inhaltsverzeichnis

Andere Clear-Com Sender Handbücher

Clear-Com

Clear-Com UPX-10 Bedienungsanleitung

Beliebte Sender Handbücher anderer Marken

NIVELCO

NIVELCO EasyTREK SCA-300 Series Betriebsanleitung

Honeywell

Honeywell 5816WMBR Bedienungsanleitung

Kamstrup

Kamstrup READy MTU Betriebsanleitung

Omega

Omega ZW Series Bedienungsanleitung

ABB

ABB Field 264H Leitfaden

Alinco

Alinco DJ-V17T Bedienungsanleitung

Dejero

Dejero EnGo 3x Bedienungsanleitung

Rosemount

Rosemount 4600 Bedienungsanleitung

Speaka Professional

Speaka Professional 2342740 Bedienungsanleitung

trubomat

trubomat GAB 1000 Bedienungsanleitung

Teledyne Analytical Instruments

Teledyne Analytical Instruments LXT-380 Bedienungsanleitung

Rondish

Rondish UT-11 Bedienungsanleitung

MG 10JRE Bedienungsanleitung

Burkert

Burkert 8177 Bedienungsanleitung

Firetide

Firetide HotPort 3203 Handbuch

Tele Radio

Tele Radio T9-02 Bedienungsanleitung

Rotronic

Rotronic HygroFlex HF3 Series Bedienungsanleitung

Jamara

Jamara FCX6 Pro Tel Bedienungsanleitung