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RFXPHT2027
User Manual
33 pgs2.03 Mb0

Gigawave US RFXPHT2027 User Manual

Portable High-Powered Transmitter (RFX-PHT)
OPERATORS MANUAL
Copyright 2006 RF Central
RFX-PHT/CMT Issue 1.1 Page 1 of 33
CONTENTS
1.1 Health & Safety ......................................................................................................5
1.1 Maximum RF Power Density Limits........................................................................6
1.3 Issue Status............................................................................................................6
2 INTRODUCTION .............................................................................................................7
2.1 GENERAL DESCRIPTION.....................................................................................7
2.2 RFX-CMT DESCRIPTION......................................................................................9
2.3 HIGH-POWER AMPLIFIER..................................................................................12
2.4 PORTABLE CARRY CASE ..................................................................................12
3 ACCESSORIES / OPTIONS..........................................................................................13
3.1 Vehicle Installation Kit ..........................................................................................13
3.2 Antenna Options...................................................................................................13
3.3 Transmit Antenna Options....................................................................................13
3.4 Receive Antenna Options.....................................................................................16
4 SPECIFICATIONS.........................................................................................................17
5.1 Camera Interfaces................................................................................................18
5.2 Operator Controls / Menus ...................................................................................18
5.3 Initialization Menu.................................................................................................18
5.4 Main Menu............................................................................................................18
5.5 Ch / Frequency Menu...........................................................................................21
5.6 Encoder Menu ......................................................................................................21
5.7 Audio 1 Menu .......................................................................................................21
5.8 Audio 2 Menu .......................................................................................................21
5.9 Status Menu .........................................................................................................22
5.10 Status Monitoring .................................................................................................22
5.11 System Configuration – Engineering Menu ..........................................................22
5.12 Prog Channels......................................................................................................22
5.13 FW Inventory ........................................................................................................23
5.14 Video Input/Video Format.....................................................................................23
5.15 Audio Input ...........................................................................................................23
5.16 Temperature.........................................................................................................23
6.1 EQUIPMENT PREPARATION – High-Power / Vehicle-Mount Configuration.......24
6.2 Preparing Vehicle Mounting Kit for operation .......................................................24
6.3 EQUIPMENT PREPARATION – Camera-Mount Configuration ...........................24
6.3.1 The RFX-CMT Camera Back .......................................................................24
6.3.2 The Receiving Equipment ............................................................................25
7 Connector Pin Outs .......................................................................................................26
7.1 SDI / CVBS Video BNC........................................................................................26
7.2 Video Connector...................................................................................................26
7.3 Audio Connector...................................................................................................26
7.4 Power Connector..................................................................................................26
7.5 Remote Connector ...............................................................................................27
RFX-PHT/CMT Issue 1.1 Page 2 of 33
8.1 Block diagram.......................................................................................................28
8.2 Audio / Video Encoder..........................................................................................29
8.3 COFDM Modulator ...............................................................................................30
8.4 Power Amplifier ....................................................................................................30
8.5 Front Panel...........................................................................................................31
The information contained in this manual remains the property of RF Central and may not be used, disclosed, or reproduced in any other form without the prior written permission of RF Central.
RF Central reserves the right to alter the equipment and specification appertaining to the equipment described in this manual without notification.
RFX-PHT/CMT Issue 1.1 Page 3 of 33
1 GENERAL SAFETY INFORMATION
The information that follows, together with local site regulations, should be studied by personnel concerned with the operation or maintenance of the equipment, to ensure awareness of potential hazards.
WARNING- RF Power Hazard: High levels of RF power are present in the unit. Exposure to
RF or microwave power can cause burns and may be harmful to health.
Switch off supplies before removing covers or disconnecting any RF cables, and before
inspecting damaged cables or antennas.
Avoid standing in front of high gain antennas (such as a dish) and never look into the open end of a waveguide or cable where RF power may be present.
Users are strongly recommended to return any equipment that requires RF servicing to RF Central.
WARNING- GaAs / BeO Hazard: Certain components inside the equipment contain Gallium Arsenide and Beryllium Oxide that are toxic substances. Whilst safe to handle under normal circumstances, individual components must not be cut, broken apart, incinerated or
chemically processed. In the case of Beryllium Oxide, a white ceramic material, the principal hazard is from the dust or fumes, which are carcinogenic if ingested, inhaled or entering damaged skin.
Please consult your local authority before disposing of these components.
CAUTION- Tantalum Capacitors: When subjected to reverse or excess forward voltage,
ripple current or temperature these components may rupture and could potentially cause personal injury.
CAUTION: This system contains MOS devices. Electro-Static Discharge (ESD) precautions
should be employed to prevent accidental damage.
RFX-PHT/CMT Issue 1.1 Page 4 of 33

1.1 Health & Safety

Exposure to Non Ionizing (RF) Radiation/Safe Working Dista nc es
The safe working distance from a transmitting antenna may be calculated from the relationship:
PT. GR
D =
√
In which D = safe working distance (meters) PT = transmitter or combiner power output (watts) GR = antenna gain ratio = anti log (gain dBi ÷10) w = power density (watts/square meter)
The RF power density value is determined by reference to safety guidelines for exposure of the human body to non-ionizing radiation. It is important to note that the guidelines adopted differ throughout the world and are from time-to-time re-issued with revised guidelines. For RF Central use, a maximum power density limit of 1w/m² is to be applied when calculating minimum safe working distances. Appendix A refers.
Important Note: It must be remembered that any transmitting equipment radiating power at
frequencies of 100 KHz and higher, has the potential to produce thermal and athermal effects upon the human body.
To be safe:
a) Operators should not stand or walk in front of any antenna, nor should they allow
b) Operators should not operate any RF transmitter or power amplifier with any of its
Worked examples
Antenna Transmitter Power Type Gain (dBi) Gain Ratio 2W 4W 10W 30W
OMNI HELIX PARABOLIC
DISH
4π.w
anyone else to do so.
covers removed, nor should they allow anyone else to do so.
4 2.5 1 1 1.5 2.5 20 100 4 5.6 9 15.5 35 3,162 22.5 32 50 87
MINIMUM SAFE DISTANCE (METERS)
RFX-PHT/CMT Issue 1.1 Page 5 of 33

1.1 Maximum RF Power Density Limits

The RF Radiation Power Density limit figure recommended by RF Central is based upon guideline levels published in:
a. IEEE standard C95.1 1999 - IEEE Standard for Safety Levels with respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz.
b. Guidelines for Limiting Exposure to Time-varying Electric, Magnetic & Electromagnetic Fields (up to 300 GHz) published in 1998 by the Secretariat of the International Commission on Non-Ionizing Radiation Protection (ICNIRP).
Both documents define guideline RF power density limits for "Controlled" and "Uncontrolled" environments. An uncontrolled environment is defined as one in which the person subjected to the RF radiation may be unaware of and has no control over the radiation energy received. The uncontrolled environment conditions can arise, even in the best regulated operations and for this reason the limits defined for the uncontrolled environment have been assumed for the RF Central recommended limit.
Documents a) and b) also show the RF power density guidelines to be frequency dependent. Different power density / frequency characteristics are presented in the two documents. To avoid complexity and to avoid areas of uncertainty, RF Central recommends the use of a single power density limit across the frequency range 100 kHz to 300 GHz. The 1w/m² power density limit we recommend satisfies the most stringent of the guidelines published to date.
Footnote: The IICNIRP document may be freely downloaded from the internet at www.icnirp.de/documents/emfgdl.pdf (PDF file)
1.3 Issue Status
Issue Date Changes
1.0 10/24/05 Initial Issue
1.1 12/05/05 Revised to include enlarged encoder parameter sets, encoder PIDs, operator menus redrawn
RFX-PHT/CMT Issue 1.1 Page 6 of 33
2 INTRODUCTION
2.1 GENERAL DESCRIPTION
The RFX-PHT is designed to utilize the RFX-CMT. The RFX-PHT portable 2 GHz digital transmitter uses either 5 or 10 watt power output. It provides a means to make any “news car” into a “live car”. “Run and shoot” vehicles now become “run and transmit” The PHT can also be used in a stand-alone mode for temporary transmit application.
This manual is to be used in conjunction with the RFX-PHT unit, which is composed of the RFX-CMT unit, a High-Power Amplifier, and Portable Carry Case.
Options for the PHT include a Vehicle Installation Kit and Antenna.
(fig. 2:1:1) – PHT Case (top view) (fig. 2:1:2) – PHT Case (standing)
(fig. 2:1:3) – PHT Case (opened with CMT installed) (fig. 2:1:4) – PHT Case (opened with CMT unclipped)
RFX-PHT/CMT Issue 1.1 Page 7 of 33
t
t
Remote Control
Amplifier Output
(to antenna)
(fig. 2-5)
Video In
Power In
(fig. 2-6) (fig. 2-7)
(12 VDC at 12.5 Amps)
(Yellow LED)
(Red LED)
Audio #1 Inpu
Audio #2 Inpu
Transmitter-to-Amplifier
Jumper
(fig. 2-8) (fig. 2-9)
(Green LED)
RFX-PHT
Control Panel
RFX-PHT/CMT Issue 1.1 Page 8 of 33
2.2 RFX-CMT DESCRIPTION
The core component of the RFX-PHT is the RFX-CMT. The RFX-CMT unit replaced the original 0101 & 0102 variants. The upgrade from 0101 to 0102 added the extra feature of an SDI input. The upgrade from 0102 to 0104 added the extra features of frequency selection to
0.5MHz increments and greater choice of encoder & modulation modes. For details of the receiver please refer to the relevant manual.
The RFX-CMT Wireless Camera system is designed for all applications, both indoor and outdoor, in which a mobile camera is essential to the televised program production. The unique modular design of the RFX-CMT ensures complete flexibility to change compression and modulation techniques to suit each individual task required, from the highest video quality to the most rugged of RF signal paths.
The system is comprised of the transmitter that contains an audio encoder, video encoder, COFDM modulator, power supplies and an RF power amplifier. In its CMT configuration, it is attached directly to this transmitter is an omni-directional antenna (see diagram 2-1 & 2-2).
CMT Inputs
Audio In
Alternative Power
Supply In
(fig. 2:1:10) (fig. 2:1:11)
Audio In
(connected)
RFX-PHT/CMT Issue 1.1 Page 9 of 33
Switchable
Component / Composite
(fig. 2:1:12) (fig. 2:1:13)
Switchable SDI/CVBS
Input
SDI/CVBS Input cable
connected
RFX-PHT/CMT Issue 1.1 Page 10 of 33
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