Rack Mounted Transmitter (RFX-RMT-II SD/HD)
OPERATOR’S MANUAL
Copyright 2007 RF Central
Need help? Contact Technical Support:
866.732.0113
(866.RFC.0113)
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CONTENTS
1 GENERAL SAFETY INFORMATION...........................................................................4
1.1 Health & Safety......................................................................................................5
1.2 Maximum RF Power Density Limits.......................................................................6
1.3 Issue Status...........................................................................................................6
1.4 Mandatory Safety Instructions to Installers & UsersError! Bookmark not
defined.
2 INTRODUCTION ..........................................................................................................7
3 SPECIFICATIONS........................................................................................................8
4 OVERVIEW OF RFX-RMT-II TRANSMITTER .............................................................9
5 FRONT PANEL CONTROLS .....................................................................................11
6 REAR PANEL CONNECTIONS .................................................................................12
6.1.1 Video input (BNC connectors) ......................................................................12
6.1.2 Analog Audio inputs (XLR connectors) .........................................................12
6.1.3 Digital Audio inputs (XLR connectors) ..........................................................13
6.1.4 Power Connector ..........................................................................................13
6.1.5 RF O/P..........................................................................................................13
6.1.6 Remote Monitoring and Control ....................................................................13
6.1.7 User data (future option)...............................................................................14
7 CIRCUIT DESCRIPTIONS .........................................................................................15
7.1 Audio / Video Encoder.........................................................................................15
7.2 COFDM Modulator ..............................................................................................17
7.3 Power Amplifier ...................................................................................................17
7.4 Power amplifier control PCB................................................................................18
7.5 Front panel ..........................................................................................................18
8 CONFIGURING THE TRANSMITTER ....................................................................... 19
8.1 Control Mode .......................................................................................................19
8.2 Status and Local remote Monitoring ....................................................................19
8.3 Top level Menu ....................................................................................................19
8.3.1 Initialization Menu .........................................................................................20
8.3.2 Top level and Current Operational State ......................................................20
8.4 Operational menu – MPEG2 encoder mode........................................................20
8.4.1 Ch / Frequency Menu ...................................................................................20
8.4.2 Audio Menu ..................................................................................................20
8.4.3 Video Input ...................................................................................................21
8.4.4 Video Definition.............................................................................................21
8.4.5 Modify User Pset ..........................................................................................21
8.4.6 Encoder Menu ..............................................................................................21
8.4.7 ASI/MPEG ....................................................................................................21
8.4.8 Presets .........................................................................................................22
8.5 Engineering Menu – MPEG2 mode .....................................................................22
8.5.1 Control Mode ................................................................................................22
8.5.2 Prog Channels ..............................................................................................22
8.5.3 No video action .............................................................................................22
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8.5.4 Video Format (NTSC/PAL) ...........................................................................23
8.5.5 PID editor......................................................................................................23
8.5.6 Software Inventory........................................................................................23
8.5.7 Remote options.............................................................................................23
8.6 Operational Menu – ASI mode ............................................................................23
8.6.1 Ch / Frequency Menu ...................................................................................23
8.6.2 ASI options ...................................................................................................23
8.6.3 ASI / MPEG ..................................................................................................24
8.7 Engineering Menu – ASI mode............................................................................24
8.8 Control Mode .......................................................................................................24
8.8.1 Prog Channels ..............................................................................................24
8.8.2 No ASI action................................................................................................24
8.8.3 FW Inventory ................................................................................................24
8.8.4 Remote options.............................................................................................24
9 PREPARING FOR OPERATION................................................................................29
9.1 The RFX-RMT-II Transmitter ...............................................................................29
9.1.1 Antennas ......................................................................................................29
9.1.2 Checks..........................................................................................................29
9.2 The Receiving Equipment ...................................................................................30
9.3 Transmitter / Receiver Tests................................................................................30
10 System Remote Monitoring and Setup ...............................................................31
11 APPENDIX A: MPEG Encoder SD Parameter Sets .............................................32
12 APPENDIX B: MPEG Encoder SD/HD Upgraded Parameter Sets ....................33
13 APPENDIX C: Table of DVB-T bit rates ...............................................................34
14 APPENDIX D: Old / New Channel Plan Freqs. ....................................................35
The information contained in this manual remains the property of RF Central and
may not be used; disclosed or reproduced in any other form whatsoever 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.
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1 GENERAL SAFETY INFORMATION
The information that follows, together with local site regulations, must 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.
Turn off power 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
Gigawave.
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.
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1.1 Health & Safety
Exposure to Non Ionising (RF) Radiation/Safe Working Distances
The safe working distance from a transmitting antenna may be calculated from the
relationship:
PT. GR.w
D =
√
4
π
in which D = safe working distance (meters)
PT = transmitter or combiner power output (watts)
GR = antenna gain ratio = anti log (gain dBi ÷10)
w = Maximum allowed 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-ionising 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 (w) 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
anyone else to do so.
b) Operators should not operate any RF transmitter or power amplifier with any of its
covers removed, nor should they allow anyone else to do so.
Worked examples
Antenna Transmitter Power
Type Gain (dBi) Gain Ratio 2W 4W 10W 30W
OMNI
HELIX
PARABOLIC
DISH
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)
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1.2 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-Ionising 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 Gigawave 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 November 6, 2007 First Issue
2 December 26, 2007 Updated SD / HD Revision
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2 INTRODUCTION
The RF Central RFX-RMT-II SD/HD transmitter is designed for permanent rack-mounted
applications, such as an ENG truck/vehicle or fixed link applications. The unit features a
comprehensive range COFDM modulation formats (QPSK, 16 QAM, and 64 QAM) and the
MPEG coding formats which may be set directly from the front panel. The RMT-II offers
significant additional features including ASI and component video inputs together with 4
audios (analog, AES digital or SDI embedded).
The unit may be switched between SD and HD encoding profiles.
The unit may be controlled in three ways: by remote control (RS232 / RS485), by front
panel key pad and LCD display (comprehensive functions), and by front panel switches
(frequency and power only).
MPEG encoding parameters are set from 16 pre-set conditions, with an additional user
presets which allows all parameters to be individually adjusted.
The transmitter comprises a self contained 19” inch rack mount (2 ‘U’) unit that powers
from +12 VDC.
At the receive site, a range of RF Central digital receivers may be used, for example, the
complementary RMR digital rack mounted receiver. Please consult the separate manual
for information detailing the operation of receivers.
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Power Requirement
3 SPECIFICATIONS
Frequency Bands 1.97 – 2.5, 5.8 GHz bands (others available upon request)
Tuning range 300 MHz (wider bandwidth available to order)
Transmit Power 500 mW nominal
Digital Specifications
Modulation COFDM DVB-T 2k
Modulation Modes QPSK, 16 QAM, 64 QAM
1
FEC:
/2 2/3 3/4 5/6 7/
Guard interval:
Data Rate 4.98 to 31.7 Mbit/s
Bandwidth Selectable 6, 7, 8 MHz (depending on mode)
Encoding Options MPEG 2: 4:2:0/4:2:2 high quality video (DVB standard)
Latency Selectable to less than 2 frames minimum, Tx to Rx
Video Input
SDI HD SMPTE-292M (299M)
SDI SD SMPTE-259M (272M)
Analog Composite and YUV, YC Component video
Audio Input
Digital HD: SDI embedded
Digital SD: SDI embedded
2 x AES3 / EBU
Analog: 2 x stereo pairs, mic/line selectable
ASI Data Input ASI transport stream, 188/204/byte, automatic selection of burst,
byte or packet mode
Aux Data Input Aux. RS232 data (optional)
General
11-18VDC, 36 Watts, Current Consumption: 2.5 amps @ 12V
Size Width: 19 inches, Height: 2 RU, Depth: 13.7 inches
Weight 13.23 lbs.
Environmental Safe use: -4° to +122°C
To spec: 14° to +113°C
Altitude: 14,500 feet
Humidity: 95% long term
Specifications may alter at the discretion of RF Central or to meet customer specific requirements.
8
1
/32 1/16 1/8 1/
4
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4 OVERVIEW OF RFX-RMT-II TRANSMITTER
SHF Power
Amplifier
Modulator
Module
Motherboard
Encoder
Module
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Front Panel
Module
9
The RFX-RMT-II transmitter comprises six main modules or assemblies:-
1. Motherboard. This board accommodates the digital encoder and modulator
boards, as well as providing DC, signal and I2C communications routing to/from all
other modules.
2. Encoder module. This module accepts all signals provided for digital transmission
and uses MPEG2 encoding / multiplexing techniques to produce a digital transport
stream for the modulator module.
3. Modulator module. This module accepts the digital transport stream from the
encoder module and uses digital COFDM modulation techniques to produce a
digital RF signal at the required RF frequency.
4. Power Amplifier. This module accepts the analog or digital RF signal at a level of
–10dBm (nominal) and amplifies the signal to a level of 500mW (+27dBm) nominal.
5 Power amplifier control PCB. This PCB accepts DC inputs from the PSU and
controls the operation condition of the Output Power Amplifier (not fitted to 2GHz
systems).
6. Front panel module. This module contains a microprocessor plus six push buttons
and an LCD display for overall monitoring and control of the RMT-II SD/HD
transmitter.
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5 FRONT PANEL CONTROLS
Front panel view of the RFX-RMT-II Rack Mount Transmitter
The front panel of an RMT-II transmitter comprises quantity 2x 2-way switches (On/Off and
PA on/off), 1x 10-way thumb-wheel switch (channel number), six push button switches
(used to navigate the various RMT-II menus), and an LCD display.
Also fitted are three LEDs – ‘DC’ (Green), ‘Status’ (bi-color green/red) and ‘Local’ (bi-color
green and amber)
On/Off Switch Down for Off, up for On
On/Off Power Amplifier Down = Transmitter output power amplifier OFF, Up =
Transmitter output power amplifier ON. This function can also be controlled via the push
buttons and RMT-II menus, and via remote control.
Channel Thumb-wheel, 0-9. Selects the pre-set RF channel. This
function can also be controlled via the push buttons and RMT-II menus, and via remote
control. Pre-set RF channel frequency allocations can be re-assigned through the RMT-II
Engineering menu.
‘DC’ LED Lit green whenever a correct DC voltage is presented to the
RMT-II transmitter. This LED will be lit irrespective of whether the unit is switched ‘on’ or
‘off’.
Status LED Stable Green indicates that the RMT-II is functioning correctly.
A flashing green light indicates that the unit is functioning correctly but that no video or ASI
signal is present at the input connector. A stable red light indicates that the unit has an
alarm condition.
Local LED Indicates whether the RMT-II is in local control mode (key-pad
or switches) or remote control (RS232 / RS485) menu. Green light = local control, amber
light = remote control.
Full details of the push button menu structure can be found in Section 8.
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6 REAR PANEL CONNECTIONS
RFX-RMT-II Rear Panel layout showing all connections
6.1.1 Video input (BNC connectors)
Connectors for either SD / HD SDI, or composite analog or component analog (Y/C or
YUV) video or ASI transport stream. Selected via front panel keypad.
75Ω BNC connectors (female)
6.1.2 Analog Audio inputs (XLR connectors)
Line / Mic Hi Z
The four channels of analog audio are connected via four 3pin XLR Female connectors.
The connectors are designated Ch1, Ch2, Ch3 and Ch4. These inputs can be
independently selected for Line or Mic level inputs with adjustable gain, via the front panel
keypad
Pin
1 Analog Ground
2 Ch1/ A / Left +ve
3 Ch1/ A / Left -ve
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6.1.3 Digital Audio inputs (XLR connectors)
The two channels of AES EBU stereo digital audio are connected via two 3pin XLR
Female Connectors. The connectors are designated Ch1/Ch2 and Ch3/Ch4.
Pin
1 Ground
2 Live/ +ve
3 Return/ -ve
6.1.4 Power Connector
Connector Type: 4 pin XLR connector (male)
Input range: 11 to 18V DC nominal
Pin Function
1 0V
2 Not Used
3 Not Used
4 +12VDC
6.1.5 RF O/P
Connector Type: 50Ω ‘N’ type (female)
6.1.6 Remote Monitoring and Control
Connector Type: 9-way ‘D’ type, female
Remote Control and Monitoring interface selectable as RS232 or RS485
(future option)
RS232 CONNECTIONS RS485 CONNECTIONS
Pin Direction Direction
1 Not Used Not Used
2 Data Tx Out from Unit Data Tx (-ve) Out from Unit
3 Data Rx Into Unit Data Rx (-ve) Into Unit
4 Not Used Not Used
5 Ground Ground
6 Not Used Data Tx (+ve) Out from Unit
7 Not Used Data Rx (+ve) Into Unit
8 Not Used Not Used
9 Not Used Not Used
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6.1.7 User data (future option)
Connector Type: 7 pin LEMO connector EGG.1B.307.CLN
User data selectable as RS232 or RS485
(future option)
RS232 CONNECTIONS RS485 CONNECTIONS
Pin
1 Not Used Not Used
2 Not Used Not Used
3 User Data User Data (-ve)
4 Not Used Not Used
5 Ground Ground
6 Not Used Not Used
7 Not Used User Data (+ve)
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7 CIRCUIT DESCRIPTIONS
RFX-RMT-II Simplified block diagram
7.1 Audio / Video Encoder
The Encoder board consists of the following main functions :
• SDI to Digital de-serializer. Converts the SMPTE-259M-C serial digital video
input to an 8 bit parallel digital video bus.
• Analog to Digital Video Converter, 10 bit over sampling ADC
Takes either Composite Video (75 Ω, 1v p-p) (CVBS); YC or YUV inputs in
either PAL / NTSC format and converts to an 8 bit parallel digital video bus.
• FPGA selects the required 8 bit parallel digital video bus from either the SDI or
analogue input, packets this data for input to the MPEG2 encoder. A relay is
used to route the input from the BNC (either SDI or CVBS) to either the SDI deserializer or the PAL/NTSC decoder.
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• Audio Analog to Digital Converter, 48kHz, 24 bit. Four high impedance analog
inputs. The channels are first buffered by a variable gain stage to accommodate
either Mic or Line level inputs. A switchable 20dB stage is also included to
accommodate low level Mic inputs. The audio channels are then converted into
digital signals and passed to the MPEG2 Encoder.
• Audio SDI de-embedder. Extracts digital audio from the SDI stream
• MPEG2 Encoder. Compresses the video and audio. The encoder uses a suite
of MPEG2 compliant compression techniques, where the data bit rate is reduced
by processing over multiple picture frames. The absolute picture (Intra frame) is
interleaved with pictures that are created using difference data (Predicted frame)
with Bi-directionally predicted frames (4:2:2 Only) in conjunction with motion
compensation; thus low data rates down to 4 Mbps, can be achieved.
The encoder includes special modes which are optimized for low delay
(latency).
The encoding parameters are loaded into the encoder at power up. These are
selected from one of the ‘preset’ encoder memories. See 8.4.6 and Appendices
A and B.
• ASI routing.
As an alternative to the internal MPEG encoder, an external ASI data stream
may be used. The ASI input to the front panel is converted to parallel, and
automatically selected for 188/204/byte mode inputs. The signal is then
configured for the modulator input format and routed direct to the transport
stream output, bypassing the MPEG2 encoder.
• DC Power Supplies
Switching DC/DC converters are used to generate the various supplies from the
incoming 9-18V battery supply. These include 2.5, 3.3V, 5V, 8V and +/-5V
supplies.
There are no field replaceable parts on the Encoder board. If a fault occurs with the board
please contact RF Central for technical assistance.
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7.2 COFDM Modulator
The normal scheme of COFDM modulation adopted by RF Central for the RFX-RMT-II is
2k carriers with selection of 6, 7, 8 MHz RF bandwidth.
The COFDM modulator has been designed to take its input from the MPEG2 encoder, or
from an external ASI. This transport stream is then modulated directly to the output
frequency band (e.g. 2GHz). This method reduces the occurrence of inter-modulated
harmonic frequencies and requires less upconverters
The COFDM modulator RF output is via the SMB connector. This output is then fed, via
the analog / digital RF switch, into the power amplifier. The nominal RF output level from
the Modulator is –9dBm.
When the traffic being carried by the transmitter is video and audio, the modulator is
automatically configured to match the data rate of the MPEG2 Encoder, as defined by
the selected parameter set.
When the traffic being carried by the Tx is ASI, the modulator may be set for
modulation, FEC and guard interval, according to the charts in Appendix C.
There are no field replaceable parts on the COFDM modulator. If a fault occurs with the
board, please contact RF Central for technical assistance.
7.3 Power Amplifier
The function of the power amplifier is to amplify the signal from the COFDM modulator to a
suitable level for transmission. The amplifier is required to be highly linear to
accommodate the high order modulation modes employed for digital system operation,
with very low distortion (low inter-modulation between carriers). The nominal output power
is +27dBm (500mW) (band specific).
The status of the PA is shown by the LED mentioned in Section 8.2, and also displayed in
the status menu.
To ensure good RF practice, when power is applied to the RMT-II, always make sure that
there is a suitable load or antenna connected to the RF output.
There are no field replaceable parts in the power amplifier. If a fault occurs with this
module, please contact RF Central for technical assistance.
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7.4 Power amplifier control PCB
This PCB controls the DC conditions of the power amplifier. It also provides power
monitoring and control muting of the PA as required by the main front panel control PCB.
Note: this unit is not fitted to 2 GHz systems.
7.5 Front panel
LCD display
A function
B function
Cancel
Enter
CPLD
Micro Controller
Triax data
interface
Triax
comms
To cable
I2C to all
Remote control
Program
memory
E2
The Front Panel / Display Controller is the main system controller for the unit. All
configurations of the unit hardware are from this board. An I2C two-wire interface is used
to communicate with all other intelligent devices within the unit. This carries the command
data and reads back status data from all boards within the unit.
All configuration parameters, video settings, audio settings, MPEG encoder parameters,
frequencies etc; are held on this board. This allows the ability to change other boards
within the unit without the loss of set-up parameters.
At power-up, this board initializes all the other boards, and, during normal operation,
monitors all the major functions and reports any problems as part of the unit status.
Operator control of the set-up parameters is via the 6 push buttons on the front of the
transmitter control unit. The graphic LCD display is connected directly to the board and is
also provided with LED back-lighting under the control of the controller.
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8 CONFIGURING THE TRANSMITTER
8.1 Control Mode
The RFX-RMT-II has 3 possible control modes
• “Switches” selection of channel frequency and PA On/Off is selected via the two
front-panel rocker switches. In this mode control is restricted to these two functions.
• “Keypad” Control via the 6 push buttons in conjunction with the menu tree
• “Remote” via RS232/RS485 remote control data interface.
To change the control mode refer to paragraph 8.5.1
8.2 Status and Local remote Monitoring
The red/green ‘status’ LED on the front panel indicates the condition of the RMT-II. If a
fault or warning exists, the Status LED will illuminate Red and the Status menu will list the
nature of the fault / warning. During initialization of the unit, the Status LED will be off.
The Local LED shows Green when the unit is under local control. The LED shows Amber
when under remote control (RS232 / 485)
8.3 Top level Menu
Four charts showing the menu trees of the RMT-II are included in this manual. These are
for:-
Operations menu – MPEG encoder mode
Engineering menu – MPEG encoder mode
Operations menu – ASI mode
Engineering Menu – ASI mode
The RMT-II is configured using an LCD display and six push buttons. These are arranged
as four navigation buttons (A, B, ▲ and ▼), plus Enter and Clear buttons.
The Enter button is used to store the modified parameter in non-volatile memory; this
parameter will then be used to configure the RMT-II and will also become the default value
when the unit is powered on the next time.
The Cancel button can be used to exit a menu without storing the parameter in the unit’s
memory.
Various menu levels are provided to allow the operator to access the different hardware
and operating parameters:
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8.3.1 Initialization Menu
At switch on the status of the initialization is displayed. If any errors are found with the
initialization of the major functions; Video, Audio, Encoder and Modulator; an error
message will be displayed. During initialization, the Status LED will be off.
8.3.2 Top level and Current Operational State
This display screen is shown during normal operation of the RMT-II and indicates the Tx
frequency (Channel number or Manual frequency), the MPEG/COFDM parameters in
use).
The B button is used to show other current parameters; this is in two parts
• Status, three screens selected using the B followed ▼ key, indicates alarms from
the unit
• Config, four screens selected using the B (twice) followed by the ▼ key, indicate
the current configuration for video, audio, encoding and modulation
8.4 Operational menu – MPEG2 encoder mode
For the top level summary screen, use the ▲▼ buttons are used to select the required
sub-menus. The Enter button is then used to allow changes to be made.
8.4.1 Ch / Frequency Menu
This menu is used to select one of the ten pre-set channels (CH1 – Ch10) or ‘manual’
frequency.
The ‘Man’ setting allows the transmit frequency to be set anywhere within the Tx operating
band. The Enter button allows the A / B buttons to select the required digit, the ▲▼
buttons then select the required value. The Enter button then stores the value and returns
to the Main menu.
8.4.2 Audio Menu
The Audio menus are split into two levels:-
Select Input type. The audio input may be selected to analog, AES digital, SDI
embedded, or internal 0dB or -18dB test tones.
When the audio input is selected to Analog, each of the 4 audios may be selected to
Line or Mic level input. Additionally each audio channel may be adjusted for gain offset
+/- 20dB.
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8.4.3 Video Input
The video input menu changes according to the selection of video definition, SD or HD
(see Section 8.4.4).
In SD mode, the video input may be selected to CVBS/YC/YUV, analog, SDI, or internal
color bars.
In the optional HD mode, the unit can accept HD SDI or generate internal alternating color
slates (Yellow and Magenta).
In the event that Bars is selected, a sub menu allows the user to select Alternating, 75%,
or 100% color bars.
8.4.4 Video Definition
This menu allows the encoding to be selected between SD and HD modes (if the unit has
been upgraded).
8.4.5 Modify User Pset
In addition to the built in Encoder Preset, mentioned in Section 8.4.6 (Encoder menu) the
operator may also setup User Presets. This menu allows the following parameters to be
manually selected:
Modulation mode (QPSK, 16 QAM, 64 QAM)
Guard interval
FEC code rate
COFDM bandwidth 6, 7, 8, MHz
Video resolution: HD only
Video profile: 4.2.0 or 4.2.2 (MP@ML) - SD only
Video delay: Standard or Low Delay
Once it is configured, the User Preset is then selected for use through Encoder menu
8.4.6.
8.4.6 Encoder Menu
Using the ▲▼ buttons, this menu is used to select the required MPEG encoder operating
parameters. These are held in 16 Preset factory memories (0 – 15), plus the User Preset
mentioned in Section 8.4.5. The display will also indicate the modulation mode (QPSK, 16
QAM, 64 QAM).
8.4.7 ASI / MPEG
The RMT-II operating mode may be selected for either ASI input or video / audio input
using the internal MPEG encoder.
After the mode is switched to ASI, the control menu converts to that shown in Section 8.6.
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8.4.8 Presets
Note: The function Presets should be distinguished from the Function Preset mentioned in
8.4.5 and 8.4.6
The function Preset allows the complete configuration of the transmitter to be stored and
loaded; this includes channel frequency, definition, video and audio inputs etc. A total of 4
Presets may be accessed, additionally a Default factory setting is provided.
8.5 Engineering Menu – MPEG2 mode
The engineering menu is entered by pressing the ‘CANCEL’ and ‘ENTER’ buttons
simultaneously for 2 to 10 seconds. When ‘ENGINEERING MENU’ appears, press the
‘ENTER’ button by itself to navigate the engineering menu headings.
8.5.1 Control Mode
The RMT-II has 3 possible control modes
• Switches - selection of channel frequency and PA On/Off is selected from the push
button menu or via the two front-panel rocker switches
• Keypad - Control is via the 6 push buttons in conjunction with the menu tree
• Remote - Control is via RS232 / RS485 remote control
• The Enter button allows the ▲▼ buttons to select the required value. The Enter
button then stores the value and returns to the Main menu.
8.5.2 Prog Channels
Each of the 10 preset frequency channels (mentioned in 8.4.1) can be independently reprogrammed as required by the user.
The ▲▼ buttons are used to select the channel to be assigned. The Enter button then
allows the four A B ▲▼ buttons to edit the required frequency. The Enter button then
stores the value and returns to the Main menu.
8.5.3 No video action
The action of the unit in the event of no video at the input can be set to:-
• Black screen
• Power amplifier muted
• Color bars
• The Enter button allows the ▲▼ buttons to select the required value. The Enter
button then stores the value and returns to the Main menu.
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8.5.4 Video Format (NTSC/PAL)
The video format may be selected NTSC or PAL;
The Enter button allows the ▲▼ buttons to select the required value. The Enter button
then stores the value and returns to the Main menu.
8.5.5 PID editor
PIDs used by the encoder and entered into the DVB transport stream may be individually
assigned.
The Enter button allows the ▲▼ buttons to select the required value. The Enter button
then stores the value and returns to the Main menu.
8.5.6 Software Inventory
The firmware versions currently installed in the transmitter can be obtained from this
menu. The serial numbers of the firmware can be used in discussions with the factory
regarding the issue status of the software.
8.5.7 Remote options
This menu allows the remote control interface to be set up for baud rate, line type (RS232
or RS485) and remote address.
8.6 Operational Menu – ASI mode
8.6.1 Ch / Frequency Menu
This menu is the same as the equivalent in the MPEG Operations menu
8.6.2 ASI options
This menu allows the modulation parameters to be individually set according to the chart in
Appendix C. This action sets the ASI data rate.
The modulation mode may be selected QPSK / 16 QAM / 64 QAM.
The FEC may be selected 1/2, 2/3, 3/4, 5/6, 7/8
The guard interval may be selected according 1/4, 1/8, 1/16, 1/32
The Enter button allows the ▲▼ buttons to select the required value. The Enter button
then stores the value and returns to the Main menu.
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8.6.3 ASI / MPEG
This function allows the operating mode may be changed from ASI input to video/audio
input (using the internal MPEG encoder).
After the mode is switched to MPEG the control menu converts to that shown in Section
8.4.
8.7 Engineering Menu – ASI mode
The engineering menu is entered by pressing the ◄ and ‘C’ buttons simultaneously for 2
to 10 seconds, then releasing the ‘C’ button.
8.7.1 Control Mode
This menu is the same as the equivalent in the MPEG Operations menu
8.7.2 Prog Channels
This menu is the same as the equivalent in the MPEG Operations menu
8.7.3 No ASI action
The action of the unit in the event of no ASI at the input can be set to:-
• No action
• Power amplifier muted
8.7.4 FW Inventory
This menu is the same as the equivalent in the MPEG Operations menu.
8.7.5 Remote options
This menu is the same as the equivalent in the MPEG Operations menu.
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DIGITAL TX
CH 1 2.11250 MHz
64QAM ½ 1/32
? /? FOR MAIN MENU
STATUS 1/3
PA ON
SYNTH LOCK YES
RFX-RMT-II SD/HD – OPS MENU
MPEG ENCODER MODE
CONFIG 1/4
ENC MEM 5
18.096257 Mbit/s
PBMP4000-5004-10
CONFIG 2/4
720p 50fps
MP@H_14L
SDI
CONFIG 3/4
ANALOGUE AUDIO
1 : LINE 0.0dB
2 : LINE 0.0dB
CONFIG 4/4
ANALOGUE AUDIO
3 : LINE 0.0dB
4 : LINE 0.0dB
STATUS 2/3
VIDEO IN NO
TS OK
STATUS 3/3
TEST OFF
AUDIO OK
MAIN MENU
CH/FREQ
CH/FREQ
CH 1 2.11250 GHZ
CH/FREQ
CH 12 2.2650 GHZ
CH/FREQ
MAN 2.2 00 GHZ
5
MAIN MENU
AUDIO
AUDIO INPUT
[ANALOGUE]
AUDIO 1
5
AUDIO 2
AUDIO 3
AUDIO 4
DIGITAL
ANALOGUE
EMBEDDED
LINE
MIC
AUDIO LEVEL 0.0DB
AUDIO 1
SELECT INPUT
AUDIO 1
SET LEVEL
E
EE
VIDEO INPUT
[SDI]
SDI
YUV
5
YC
CVBS
BARS 75%
100%
ALT BARS
E
ENCODER
PSET 1
PSET 8
ASI/MPEG
[MPEG]
ASI
MPEG
E
B
B
A = CURSOR LEFT
B = CURSOR RIGHT
= INCREASE DIGIT VALUE
= DECREASE DIGIT VALUE
TONES 0DB
TONES -18DB
MODIFY USER
PSET
GUARD INTERVAL
CODE RATE
MODULATION MODE
VIDEO DEFINITION
[HD]
HIGH DEFINITION
ST’D DEFINITION
E E
MAIN MENU
PRESETS
PRESETS MENU
DEFAULT
PR1 PR3
PR2 PR4
PRESET 1
LOAD
SAVE
E
E
VIDEO RESOLUTION
USER PSET 1
VIDEO PROFILE
COFDM BANDWIDTH
DELAY
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ENGINEER MENU
CONTROL MODE
ENGINEERING
CONTROL MODE
SWITCH CTRL
CONTROL MODE
KEYPAD CONTROL
E
VID FORMAT
[NTSC]
Key: E = Enter
E/C = Enter or Cancel
RFX-RMT-II SD/HD – ENG MENU –
MPEG ENCODER MODE
NO VIDEO
ACTION
E
Enter Engineering mode by
pressing C and E buttons together
SOFTWARE
INVENTRY
E
FRONT PANEL
TDFP-0164-01
MOTHERBOARD
RMMB-0102-01
PSU MONITOR
TDMN-0401
ENG MENU
PROG CHANNELS
PROG CHANNEL
Ch 1 2.30000GHz
PROG CHANNEL
Ch 10 2.4 600GHz
PROG CHANNEL
Ch 10 2.70000GHz
E
5
A = MOVE TO DIGIT ON LEFT
B = MOVE TO DIGIT ON RIGHT
= INCREASE DIGIT VALUE
= DECREASE DIGIT VALUE
BLK SCREEN
MUTE PA
BARS
NTSC
PAL
PID EDITOR
PID PMT 32
PID PCR 8190
PID VID 300
AUDIO 1 200
AUDIO 2 201
USER 202
ENCODER FPGA
TDME-0102-06
ENCODER
TDME-0101-03
MOD SYNTH
TDZU-0801-03
REMOTE
OPTIONS
E
REMOTE ADDRESS
[01]
LINE TYPE
[RS232]
BAUD RATE
[9600]
01
RS232
RS485
4800
9600
19200
38400
E
E
E
E
E E
CONTROL MODE
REMOTE CONTROL
CHANNEL
PLAN
[OLD PLAN]
OLD PLAN
NEW PLAN
E
CABLE
EQULAIZER
[BY-PASSED]
BY-PASSED
IN CIRCUIT
E
SPECTRUM
[NORMAL]
NORMAL
INVERTED
E
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DIGITAL TX
CH 1 2.11250 MHz
64QAM ½ 1/32
? /? FOR MAIN MENU
STATUS 1/2
PA ON
SYNTH LOCK YES
CURRENT OPERATIONAL STATE
RFX-RMT-II SD/HD – OPS MENU –
ASI MODE
CONFIG 1/1
ASI DATA RATE
18.096257 Mbit/s
ASI TYPE NORMAL
STATUS 2/2
ASI IN NO
TS OK
MAIN MENU
CH/FREQ
CH/FREQ
CH 1 7.11250 GHZ
CH/FREQ
CH 12 7.2650 GHZ
CH/FREQ
MAN 7.2 00 GHZ
5
E
ASI OPTIONS
MODULATION MODE
GUARD INTERVAL
ASI/MPEG
ASI
MPEG
B
B
A = CURSOR LEFT
B = CURSOR RIGHT
= INCREASE DIGIT VALUE
= DECREASE DIGIT VALUE
CODE RATE
QPSK
16QAM
64QAM
1/2
2/3
3/4
1/4
1/8
1/16
1/32
EE
5/6
7/8
ASI TYPE REBRO
NORMAL
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ENGINEER MENU
CONTROL MODE
ENGINEERING
CONTROL MODE
SWITCH CTRL
CONTROL MODE
KEYPAD CTRL
E
Key: E = Enter
E/C = Enter or Cancel
RFX-RMT-II SD/HD – ENG MENU –
ASI MODE
NO ASI
ACTION
E
Enter Engineering mode by
pressing C and E buttons together
SOFTWARE
INVENTRY
E
FRONT PANEL
TDFP-0164-01
MOTHERBOARD
RMMB-0102-01
PSU MONITOR
TDMN-0401
ENG MENU
PROG CHANNELS
PROG CHANNEL
Ch 1 2.30000GHz
PROG CHANNEL
Ch 10 2.4 600GHz
PROG CHANNEL
Ch 10 2.70000GHz
E
5
A = MOVE TO DIGIT ON LEFT
B = MOVE TO DIGIT ON RIGHT
= INCREASE DIGIT VALUE
= DECREASE DIGIT VALUE
NO ACTION
MUTE PA
ENCODER FPGA
TDME-0102-06
ENCODER
TDME-0101-03
MOD SYNTH
TDZU-0801-03
REMOTE
OPTIONS
E
REMOTE ADDRESS
[01]
LINE TYPE
[RS232]
BAUD RATE
[9600]
01
RS232
RS485
4800
9600
19200
38400
E
E
E
E
CONTROL MODE
REMOTE CTRL
9 PREPARING FOR OPERATION
EQUIPMENT PREPARATION
Before leaving the equipment base to undertake an operation it is recommended that the
following equipment checks be made.
9.1 The RFX-RMT-II Transmitter
9.1.1 Antennas
Depending on the frequency band, the
antennas
CO series Omni antennas are typically used for ground based mobile operations, or
helicopter air to ground
GPS controlled antenna for helicopter air to ground
PA series low profile antennas are used for uplinking ground to air, or on-board linking
HX series antennas offer increased gain and directivity
FBA fan-beam antennas offer increased gain and 90 degree sector coverage.
Parabolic antennas offer the highest gain, and longest operation range
9.1.2 Checks
Confirm the correct encoder mode of operation is selected. 8.4.6
Confirm the correct frequency is selected. 8.4.1
Confirm the correct Video input type is selected. 8.4.3
Confirm the correct Audio input type is selected.
Confirm the correct Audio level is selected (analog audio only). 8.4.2
Check that the Video, audio, DC and RF cables are in good condition.
RMT-II
can be used with a variety of RF Central
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9.2
The Receiving Equipment
The RFX-RMT-II transmitter may be used with a variety of RF Central digital receivers
including:
RFX-RMR, RMR-II series rack-mounted receivers
RFX-PMR, PMR-II series portable receivers
RFX-RMRT, RMRT-D rack-mounted receivers
RFX-MDR-PC
RFX-RMR-X6 diversity receivers
Full details of the operation of the receivers are given in the associated manuals
When used with the
RMT-II
transmitter, the RMR / RMR-II, PMR / PMR-II, RMRT / RMRT-D,
and RMR-X6 digital receivers produce four audio channels (analog and AES3 digital) together
with SDI and composite video outputs. These receivers also have an ASI output.
Check that audio, video, and DC cables are of sufficient total length and are in good condition.
If extension cables are necessary, ensure that the connectors are compatible and of good
quality to avoid problems at the site.
Check that the receiving antenna / receiver interfaces are clean and free from dust and other
unwanted materials.
If tripods are to be used to mount the equipment, make sure that some means of securing the
tripod or weighting it down is provided. Gusty wind conditions may put installations at risk,
particularly when parabolic antenna dishes are to be used.
Check that the receiver channel frequencies are compatible with those of the
RMT-II
transmitter and set the channel selector switch to the channel number required. The receiver
is labelled with channel number and frequency information.
9.3 Transmitter / Receiver Tests
Whenever practical, set up the system and test it before leaving for the remote site to
ensure that all components of the system are working properly. Checking the system,
making necessary adjustments, and taking corrective actions ahead of time, will pay off
later when setting up at the remote site.
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10 System Remote Monitoring and Setup
The RMT-II may be operated under remote control using RS232 or RS485. Information for
the set-up of the remote control interface is given in paragraph 8.5.7.
For details of the remote control protocol please contact
RF Central
.
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11 APPENDIX A: MPEG Encoder SD Parameter
Sets
Note: The following parameters are typical for the transmitter and are issued for guidance
only. Some transmitters may have different configurations according to individual
customer requirements.
Set
Part Number Rate
SD
1 PBMP-3000-
1010-10
2 PBMP-3000-
1011-10
3 PBMP-3000-
1012-10
4 PBMP-3000-
1002-6B
5 PBMP-3000-
1004-08
6 PBMP-3000-
1005-08
7 PBMP-3000-
1006-08
8 PBMP-3000-
1002-68
9 PBMP-3000-
1005-02
10 PBMP-3000-
1006-02
11 PBMP-3000-
1007-02
12 PBMP-3000-
1008-02
13 PBMP-3000-
1002-41
14 PBMP-3000-
1004-00
15 PBMP-3000-
1005-00
16 PBMP-3000-
1006-00
(Mbit/s)
18.0962 64-QAM,
18.0962 64-QAM,
18.0962 64-QAM,
16.5882 16-QAM,
12.0641 16-QAM,
12.0641 16-QAM,
12.0641 16-QAM,
9.95293 16-QAM,
9.04812 QPSK,
9.04812 QPSK,
9.04812 QPSK,
9.04812 QPSK,
7.37254 QPSK, FEC2/3,
6.03208 QPSK, FEC1/2,
6.03208 QPSK, FEC1/2,
6.03208 QPSK, FEC1/2,
COFDM Mode MPEG Video
Rate
(Mbit/)
FEC 1/2, G1/32
FEC1/2, G1/32
FEC1/2, G1/32
FEC5/6, G1/4
FEC1/2, G1/32
FEC1/2, G1/32
FEC1/2, G1/32
FEC1/2, G1/4
FEC3/4, G1/32
FEC3/4, G1/32
FEC3/4, G1/32
FEC3/4, G1/32
G1/8
G1/32
G1/32
G1/32
422@ML 16.4 Frame
422@ML 16.4 Frame
MP@ML 14.3 Frame
422@ML 14.8 Frame
422@ML 10.4 Frame
422@ML 10.4 Frame
MP@ML 10.4 Frame
422@ML 8.3 Frame
422@ML 7.4 Frame
422@ML 7.4 Frame
MP @ ML 7.4 Frame
MP@ML
MP@ML 5.6 Frame
422@ML
MP @ ML 4.4 Frame
MP @ ML 4.4 Frame
7.4 Frame
4.4 Frame
Encoding
Mode
GOP=16
GOP=4
Intraslice
GOP=4
GOP=16
GOP=4
Intraslice
GOP=4
GOP=16
GOP=4
GOP=4
Intraslice
GOP=4
GOP=16
GOP=4
Intraslice
Audio
Rate
(kbit/)
256 Std.
256 Std.
256 Low
256 Std.
256 Std.
256 Std.
256 Low
256 Std.
256 Std.
256 Std.
256 Std.
256 Low
256 Std.
256 Std.
256 Std.
256 Low
Delay
Setting
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12 APPENDIX B: MPEG Encoder SD/HD
Upgraded Parameter Sets
Note: The following parameters are typical for the transmitter and are issued for guidance
only. Some transmitters may have different configurations according to individual
customer requirements.
HD Note: High Definition parameter sets available as optional upgrade. An additional
charge applies. Factory default parameters are Standard Definition only.
Set
Part Number Rate
HD
(Mbit/s)
COFDM Mode
MPEG Video
Rate
(Mbit/)
Video
Format
Encoding
Mode
Audio
Rate
(kbit/)
Delay
Setting
1 PBMP-3000-
2 PBMP-3000-
3 PBMP-3000-
4 PBMP-3000-
5 PBMP-3000-
6 PBMP-3000-
7 PBMP-3000-
8 PBMP-3000-
SD
1 PBMP-3000-
2 PBMP-3000-
3 PBMP-3000-
4 PBMP-3000-
5 PBMP-3000-
6 PBMP-3000-
7 PBMP-3000-
8 PBMP-3000-
5002-2A
5011-10
5002-31
5012-10
5006-0A
5013-10
5006-11
5014-10
1008-10
1005-69
1005-42
1005-40
1009-10
1006-69
1006-42
1006-40
17.564 16-QAM,
FEC3/4, G1/16
18.096 64-QAM,
FEC1/2, G1/32
23.418 64-QAM,
FEC1/2, G1/32
18.096 64-QAM,
FEC1/2, G1/32
18.096 16-QAM,
FEC3/4, G1/32
18.096 64-QAM,
FEC1/2, G1/32
24.128 64-QAM,
FEC2/3, G1/32
18.096 64QAM,
FEC1/2, G1/32
18.096 16-QAM,
FEC1/2, G1/32
13.271 16-QAM,
FEC2/3, G1/4
8.294 QPSK,
FEC3/4, G1/8
5.529 QPSK,
FEC1/2, G1/8
18.096 64-QAM,
FEC1/2, G1/32
13.271 16-QAM,
FEC2/3, G1/4
8.294 QPSK, FEC3/4,
G1/8
5.529 QPSK, FEC1/2,
G1/8
MP@H14-L
Intraslice
MP@H14-L
Intraslice
MP@H14-L
Intraslice
MP@H14-L
Intraslice
MP@H14-L
Intraslice
MP@H14-L
Intraslice
MP@H14-L
Intraslice
MP@H14-L
Intraslice
422 P@ ML
Intraslice
MP @ ML
Intraslice
MP @ ML
Intraslice
MP@ML,
Intraslice
422 @ ML
GOP 12
MP@ML,
GOP12
MP @ ML
GOP 12
MP @ ML
GOP12
15.00 1080i
(25/29 fps)
16.00 1080i (25/29
fps)
21.00 1080i (25/29
fps)
16.00 720p (50/59
fps)
16.00 1080i (25/29
fps)
16.00 1080i (25/29
fps)
22.00 1080i (25/29
fps)
16.00 720P (50/59
fps)
16.00 PAL/NTSC Field
11.5 PAL/NTSC Field
6.50 PAL/NTSC Field
4.00 PAL/NTSC Field
17.00 PAL/NTSC GOP 12 256 Std.
12.00 PAL/NTSC GOP 12 256 Std.
7.0 PAL/NTSC GOP 12 256 Std.
4.5 PAL/NTSC GOP 12 256 Std.
Field
Intraslice
Field
Intraslice
Field
Intraslice
Field
Intraslice
Frame
Intraslice
Frame
Intraslice
Frame
Intraslice
Frame
Intraslice
Intraslice
Intraslice
Intraslice
Intraslice
384 Low
384 Low
384 Low
384 Low
384 Std.
384 Std.
384 Std.
384 Std.
256 Low
256 Low
256 Low
256 Low
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13 APPENDIX C: Table of DVB-T bit rates
Modulation Code rate
QPSK
1/2
2/3
3/4
5/6
7/8
at each guard interval (symbol fraction)
1/32 1/16 1/8 1/4
6.03
8.04
9.05
10.1
10.6
Bit rate (Mbit/s)
5.85
7.81
8.78
9.76
10.2
5.53
7.37
8.29
9.22
9.68
4.98
6.64
7.46
8.29
8.71
16-QAM
64-QAM
1/2
2/3
3/4
5/6
7/8
1/2
2/3
3/4
5/6
7/8
1/32 1/16 1/8 1/4
12.1
16.1
18.1
20.1
21.1
11.7
15.6
17.6
19.5
20.5
11.1
14.7
16.6
18.4
19.4
1/32 1/16 1/8 1/4
18.1
24.1
27.1
30.2
31.7
17.6
23.4
26.3
29.3
30.7
16.6
22.1
24.9
27.6
29.0
9.95
13.3
14.9
16.6
17.4
14.9
19.9
22.4
24.9
26.1
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14 APPENDIX D: Old / New Channel Plan Freqs.
Channel Frequency
1 Old 1999.0
2 Old 2016.5
3 Old 2033.5
4 Old 2050.5
5 Old 2067.5
6 Old 2084.5
7 Old 2101.5
8 2458.5
9 2475.5
10 2492.0
1 New 2031.5
2 New 2043.5
3 New 2055.5
4 New 2067.5
5 New 2079.5
6 New 2091.5
7 New 2103.5
8 2458.5
9 2475.5
10 2492.0
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