COBHAM Inline Camera Mount Broadcast Versioin User`s manual

User’s Manual
The most important thing we build is trust.
Messenger Digital Transmitter (MDT-B)
- Broadcast Version -
100-M0056X2B
05/28/09
Cobham Surveillance
GMS Products
1916 Palomar Oaks Way Ste 100
Carlsbad, CA 92008
T: 760-496-0055
F: 760-496-0057
www.cobham.com/gms
Table of Contents
1.0 IMPORTANT WARNING AND GENERAL SAFETY INFORMATION........................................................ 4
2.0 ACRONYMS................................................................................................................................................................... 6
3.0 INTRODUCTION......................................................................................................................................................... 6
3.1 Key System Features ............................................................................................................................................ 7
4.0 THEORY OF OPERATION......................................................................................................................................... 7
5.0 GETTING STARTED ................................................................................................................................................... 7
5.1 Initial Checkout ...................................................................................................................................................... 8
6.0 HARDWARE OVERVIEW.......................................................................................................................................... 9
6.1 Standard MDT-B..................................................................................................................................................... 9
6.1.1 MDT-B Connectors.....................................................................................................................................10
6.1.1.1 RF Output ...................................................................................................................................................10
6.1.1.2 I/O..................................................................................................................................................................10
6.1.1.3 SDI/ASI Input (optional)......................................................................................................................10
6.1.2 Frequency Select Switches.....................................................................................................................11
6.2 MDT-B Inline Camera Unit (optional).........................................................................................................12
6.2.1 MDT Inline Camera Mount Connectors............................................................................................12
6.2.1.1 RF Output ...................................................................................................................................................13
6.2.1.2 I/O..................................................................................................................................................................13
6.2.1.3 Video Input ...............................................................................................................................................13
6.2.1.4 Power Switch............................................................................................................................................14
6.2.1.5 LCD Display ...............................................................................................................................................14
6.2.1.6 SDI/ASI Input (optional)......................................................................................................................14
7.0 SOFTWARE OVERVIEW ........................................................................................................................................ 14
7.1 System Requirements ........................................................................................................................................14
7.2 Installation..............................................................................................................................................................14
7.3 MDL_B Configurator Functions.....................................................................................................................15
7.3.1 Function Buttons.........................................................................................................................................16
7.3.2 Field Definitions...........................................................................................................................................17
7.3.3 Pull-Down Menu Definitions ..................................................................................................................18
7.3.3.1 File.................................................................................................................................................................18
7.3.3.2 Configuration ...........................................................................................................................................18
7.3.3.3 Help...............................................................................................................................................................21
8.0 SPECIFICATIONS .................................................................................................................................................... 23
8.1 Video Encoding.....................................................................................................................................................23
8.2 Audio Encoding ....................................................................................................................................................23
8.3 Transport Stream .................................................................................................................................................23
8.4 RS-232 Interfaces/RCU .....................................................................................................................................23
8.5 COFDM RF Output...............................................................................................................................................23
8.6 Modulation .............................................................................................................................................................24
8.7 Power ........................................................................................................................................................................24
8.8 Physical Dimensions (without mating connectors)...............................................................................24
8.9 Environmental .......................................................................................................................................................24
9.0 THE D/C (DOWN CONVERTER)/IF FREQUENCIES EXPLAINED ........................................................... 24
9.1 If Frequencies........................................................................................................................................................24
9.2 Local and Remote Power ..................................................................................................................................25
10.0 CABLE LOSSES .......................................................................................................................................................... 26
10.1 Coax Cable..............................................................................................................................................................26
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List of Tables
Table 1 – Safe Distances .......................................................................................................................................................5
Table 2 - I/O DB-44 Connector Pin Out.......................................................................................................................10
Table 3 - I/O DB-15 Connector Pin Out.......................................................................................................................13
Table 4 - MDT Field Definitions ......................................................................................................................................17
Table 5 - DB-9 Connector Pin Out for the D/C .........................................................................................................26
Table 6 - RG59/U Coax Cable Losses ............................................................................................................................27
List of Figures
Figure 1 - Basic MDL Link Setup........................................................................................................................................ 8
Figure 2 - MDT-B Connectors............................................................................................................................................ 9
Figure 3 - MDT-B Inline Camera Unit...........................................................................................................................12
Figure 4 - MDL_B Configurator Main Screen ............................................................................................................15
Figure 5 - MDT Configurator Main Screen.................................................................................................................16
Figure 6 - Select MPEG Encoder Profile.......................................................................................................................19
Figure 7 - Others ....................................................................................................................................................................20
Figure 7a – RF Power Off ...................................................................................................................................................20
Figure 8 - Transport Stream Setup.................................................................................................................................21
Figure 9 - Channel Rate Guide .........................................................................................................................................22
Figure 10 - FW Version .......................................................................................................................................................22
Figure 11 - BDC Connectors.............................................................................................................................................26
Appendix
Appendix A – Cable, MDT-B External Breakout for Broadcast Version .........................................................28
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1.0 Important Warning and General Safety Information
The following information is presented to the operator to ensure awareness of potential harmful
RF (radio frequency) exposure and general hazards. With regards to potential harmful RF
electromagnetic fields the text below is only a brief summary highlighting the possible risks and how
to minimize exposure. The summary is based on OET Bulletin 65 “Evaluating Compliance with FCC
Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields” (1). The user should
carefully read and comprehend the following before operating the equipment and for additional in
depth information refer to OET Bulletin 65.
1. FCC has set guidelines (1) for evaluating exposure to RF emissions that the user must be aware of when
operating GMS’s MDT-B microwave transmitter. The maximum power density allowed at 1500 –
100,000 MHz is 5mW/cm2 for occupational/controlled exposure* and 1mW/cm2 for general
population/uncontrolled exposure**. These are the limits for maximum permissible exposure (MPE) as
called out in the FCC guidelines (for the above mentioned frequencies).
2. Exposure is based on upon the average time spent within the RF field with a given intensity (field units
in mW/cm2). Hence it may be controlled (or at least minimized) by observing the safe distances and
time exposed as shown in Table 1. These safe distances are calculated from equations predicting RF
Fields (3) with the following assumptions:
•
•
•
The transmitter maximum power is 23dBm (0.2W)
The antenna used has a 2dBi gain
The transmitter is used in a fixed location
* “Occupational /controlled exposure limits apply to situations in which persons are exposed as a
consequence of their employment and in which those persons who are exposed have been made fully
aware of the potential for exposure and can exercise control over their exposure.
Occupational/controlled exposure limits also apply where exposure is of a transient nature as a result of
incidental passage through a location where exposure levels may be above general
population/uncontrolled limits (see below), as long as the exposed person has been made fully aware of
the potential for exposure and can exercise control over his or her exposure by leaving the area or by
some other appropriate means. …….” (2)
** “General population/uncontrolled exposure limits apply to situations in which the general public may
be exposed or in which persons who are exposed as a consequence of their employment may not be
made fully aware of the potential for exposure or cannot exercise control over their exposure.
Therefore, members of the general public would always be considered under this category when
exposure is not employment-related, for example, in the case of a telecommunications tower that
exposes persons in a nearby residential area.” (2)
(1)
OET Bulletin 65, Appendix A Table 1 Limits for MPE
http://www.fcc.gov/Bureaus/Engineering_Technology/Documents/bulletins/oet65/oet65.pdf
(2)
OET Bulletin 65, page 9, definitions of types of exposure
http://www.fcc.gov/Bureaus/Engineering_Technology/Documents/bulletins/oet65/oet65.pdf
(3)
OET Bulletin 65, page 19, Equations for predicting RF Fields
http://www.fcc.gov/Bureaus/Engineering_Technology/Documents/bulletins/oet65/oet65.pdf
The user (and bystanders) should remain beyond the distances from the antenna at all times as stated in
Table 1 when the transmitter is operating for no longer than the time periods indicated (keeping in mind
this is the average time).
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If any of the above variables change, such as a higher gain antenna, less or more power output from the
transmitter, additional transmitters used, etc. then the safe distances would need to be recalculated. The
user can either refer to the equations predicting RF Fields as noted in the above section or call contact
GMS for advice at (760)-496-0055.
Table 1 – Safe Distances
Frequency = 1500 - MDTB Transmitter Power =
100,000 MHZ
0.2W (+23 dBm)
Antenna Gain =
+2dbi
Occupational /controlled
exposure (5mW/cm2)
Safe Distance
Average
Time
2.2 cm
6 minutes
30 minutes
General population/uncontrolled
exposure (1mW/cm2)
Safe Distance
Average Time
5 cm
3. The transmitter, which can be operated in fixed or mobile applications, is rated at 0.2W (+23dBm) RF
power and is capable of harmful radiation if safe operating practices are not observed (see sections 1
& 2 above).
4. It should be noted that this device is an intentional radiator and that any changes or modifications not
expressly approved could void the user’s authority to operate the equipment.
5. Do not substitute any antenna for the one supplied or recommended by the manufacturer. The
installer is responsible for ensuring that the proper antenna is installed.
6. Antenna minimum safe operating distances should be observed as stated in section 2 above. It is the
responsibility of the qualified end-user of this intentional radiator to control the safe distances and
exposure limits to bystanders.
7. DC power (+12VDC) to the unit should never be applied until the antenna (or other suitable load) has
been attached to the device SMA RF output connector. Safe operating procedures must be observed
when unit is transmitting into an antenna (see sections 1 & 2 above).
8. Electro-Static Discharge (ESD) precautions should be observed as a safe practice.
9. The transmitter will generate considerable heat and is the responsibility of the end user to properly
heat sink the device before using.
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2.0 Acronyms
This section lists and describes the various acronyms used in this document.
Name
16 QAM
64 QAM
A/V
AES
ABS
ASI
COFDM
CVBS/Y
C
D/C
FEC
GUI
I/O
Kbaud
Kbps
Mbps
MDL
MDL-B
MDR
MDR-B
MDT
MDT-B
MER
MPEG
NTSC
PAL
QPSK
RF
RX
S/N
THD
SDI
TX
VDC
Meaning
16-state Quadrature Amplitude Modulation
64-state Quadrature Amplitude Modulation
Audio/Video
Advanced Encryption System (32 bit)
Messenger Basic Scrambling (8 bit)
Asynchronous Serial Interface
Coded Orthogonal Frequency Division Multiplexing
Composite video/Luminance with S-video
Chroma video
Down-Converter
Forward Error Correction
Graphical User Interface
Input/ Output
Kilobaud per second
Kilobits per second
Megabits per second
Messenger Digital Link
Messenger Digital Link, Broadcast Version
Messenger Digital Receiver
Messenger Digital Receiver, Broadcast Version
Messenger Digital Transmitter
Messenger Digital Transmitter, Broadcast Version
Modulation Error Rate
Moving Picture Experts Group
National Television System Committee
Phase Alternation Line
Quadrature Phase Shift Keying
Radio Frequency
Receiver
Signal-to-Noise Ratio
Total Harmonic Distortion
Serial Digital Interface
Transmitter
Volts (Direct Current)
3.0 Introduction
The Broadcast version of the Messenger Digital Link (MDL) includes the Broadcast version of both the
Messenger Digital Transmitter (MDT-B), the Messenger Digital Receiver (MDR-B), and one or two
external Down Converters (sold separately) for frequencies exceeding the direct input of 861 MHz.
The MDT-B (Messenger Digital Transmitter, Broadcast version) also works with any DVB-T compliant
receiver.
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The Broadcast version of the MDL (Messenger Digital Link) provides professional Audio/Video (A/V)
interfaces and processing. All versions of the MDL use a robust digital modulation system known as
Coded Orthogonal Frequency Division Multiplexed (COFDM) that provides frequency diversity and
powerful Forward Error Correction (FEC) algorithms. The MDL provides a robust wireless link that is
effective against the multipath interference experienced by analog systems, and provides crisp, clear
pictures in the most difficult of terrains.
This manual provides information on how to operate the MDT-B as well as pertinent technical
information related to the overall system. Also refer to model identifier (on-line document, 100MNI0031) at GMS website, www.gmsinc.com, for available frequency and power configurations along
with available options.
3.1
Key System Features
• SDI, ASI, Component, S-Video & Composite Interfaces
• 4:2:2 and 4:2:0
• Coded Orthogonal Frequency Division Multiplexed (COFDM) Modulation
• Output Frequency 1 to 6 GHz (In-Bands)
• Low System latency (~80ms)
• Built-in MPEG-2 Encoder
• Companion COFDM Receiver with Maximal Ratio Pre-Detect Diversity Reception.
• Rugged and Compact Portable Design
4.0 Theory of Operation
The MDT-B Broadcast version accepts either an ASI (Asynchronous Serial Interface,) SDI (Serial Digital
Interface), Component, S-Video or Composite video signal and embedded audio or analog stereo
audio inputs (mic or line level). The video is compressed (ASI data streams are passed through
bypassing the MPEG encoder) according to MPEG-2 specifications. The MPEG-2 supports 4:2:2 or 4:2:0
chroma sampling, 422P@ML, MP@ML and SP@ML profiles and maintains the original signal’s video
fidelity. The audio is compressed using MPEG Layer II compression. The audio, video and data packet
PES streams are multiplexed with basic service data to indicate the service name and transmitted
across the wireless link.
Additionally, the MDT-B/MDR-B combination employs a specially designed ‘low delay’ coding
technology, which provides an end-to-end latency of approximately 80ms without the introduction of
any further MPEG encoding artifacts. This ensures that the picture you see is what is happening now –
crucial for applications such as sports coverage.
5.0 Getting Started
The standard MDT kit includes the following items:
MDT-B unit (example GMS p/n MDTF1A0NXXX001)
MDT-B full breakout cable (GMS p/n 780-C0224)
(Power, A/V, Data, Control interfaces)
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NOTE: Based on customer application GMS may deliver additional cables and antennas. Contact GMS
for further information.
The MDT-B is pre-configured by GMS prior to shipment (based on customer requirements), thus is
ready to work “right out of the box”.
5.1
Initial Checkout
Prior to installing a MDT-B unit into the desired target environment, an initial checkout should be
performed to ensure proper operation of the unit. The initial checkout consists of configuring a
basic MDL-B link.
Figure 1 shows a basic configuration to establish a MDL-B wireless link (NOTE: MDR-B and D/C
units and their associated hardware are sold separately). The steps necessary to setup the
configuration shown in Figure 1 are shown below:
Power Source
MDT
D/C
Power Supply
MDR-B
MDT-B
MDR
Video Source
Monitor
Figure 1 - Basic MDL Link Setup
1. Install omni-directional antennas onto the MDT-B RF output port and Down- Converter (D/C)
RF input port. Note: Transmitters should not be powered on without a load. Doing so
could cause the output PA to stop working.
2. Attach the MDT-B breakout cable (DB-44 end) to the MDT-B unit.
3. Attach a RF cable from the D/C IF output port to MDR-B IF IN #1 port.
4. Attach a composite video source to MDT-B BNC video input cable (marked CVBS/Y) that is
located on the MDT-B breakout cable. S-video and Component video input is also available.
5. Attach a video cable from one of the BNC video output ports on the MDR-B to a video
monitor.
6. To prepare to power the MDT-B unit, attach the red and black wires from the MDT-B breakout
cable to +12 V terminal and ground of power supply, respectively. NOTE: The power supply
used needs to be able to provide at least 1.2 Amp of current at a nominal +12 VDC input. To
prepare to power the MDR-B, attach +12 VDC to provided power pigtail.
7. Turn on the video source and video monitor equipment.
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8. Apply power to the MDT-B and the MDR-B unit by attaching +12volts. To turn on the D/C,
either 1) from the front control panel of the MDR-B toggle through the menus until “R1 (or R2
in the case of diversity systems) BDC POWER DISPLAY” is displayed. Ensure power is toggle
“ON” (default mode is “ON” when shipped with down converters (D/C). [NOTE: This places
+12VDC (sourced by the MDR-B) onto the IF IN #1 port which, via the attached coax cable,
provides power up to the D/C] or 2) if using local +12 Vdc to power up the D/C then ensure the
MDR-B “R1 BDC POWER DISPLAY” is set to “OFF” and apply +12 Vdc to pin 1, GND to pin 3 of
the DB-9 pin connector located on the bottom side of the D/C. The power switch on the side
of the D/C will control the ‘ON’/’OFF’ positions for local power. See Section 8 at the end of this
document for further explanation of local and remote powering of the D/C and when to use
each one.
9. After approximately 45 seconds, the link should be established and video provided by the
source should be displayed on the monitor.
The initial checkout described above is simply to check the basic video operation of the MDT-B
unit. For further details on monitoring and controlling the MDT-B using GMS’ optional MS
Windows-based MDLB Configurator software program, see Section 6.0.
6.0 Hardware Overview
There are two basic transmitter configurations: the standard MDT-B and the inline professional
camera unit (this is an optional enclosure for mounting the standard MDT- B in professional camera
applications). The hardware for each configuration is shown below:
6.1
Standard MDT-B
“RF OUT” (SMA
“SDI/ASI Input”
(BNC Connector)
Frequency
Select Switches.
SW100
DB-44 Connector
(I/O and Power)
Figure 2 - MDT-B Connectors
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6.1.1
MDT-B Connectors
There are three connectors located on the MDT-B unit as shown in Figure 2. They are for
interfacing the RF, SDI/ASI, audio, video, power, RS-232 signals.
6.1.1.1
RF Output
The MDT-B uses a female SMA bulkhead connector for its ‘RF Output’ port.
Note: Transmitters should not be powered on without a load. Doing so could
cause the output PA to stop working.
6.1.1.2
I/O
The ‘I/O’ connector is a male, high-density DB-44. It is used to provide the interface for
external power, audio, analog video and RS-232 signals. The MDT-B has a separate
RS232 channel (labeled “Control” on the external breakout cable) for control and
monitoring the unit. GMS MDLB Configurator software program (as explained in section
6) makes use of the RS232 control lines. The RS-232 channel utilizes a 3-wire
configuration. The pin out for the I/O connector is shown in Table 1. NOTE: A USB
connector and an additional RS232 channel ( labeled “DATA”) are currently provided with
the external breakout cable . The USB interface is an alternate method of interfacing to
the PC if DB-9 connectors are not available. The “Data” RS232 channel is dedicated for
low-rate data to be transmitted along with the audio and video.
6.1.1.3
SDI/ASI Input (optional)
A BNC connector is provided for Serial Digital or Asynchronous Digital data streams.
Table 2 - I/O DB-44 Connector Pin Out
Pin
1
2
3
4
5
6
7
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Signal
RS232 Data Tx
RS232 Data Rx
RS232 GND
Not connected
SDA
SCL
CVBS/Y
8
9
GND
C/Pr
10
11
12
13
14
GND
Pb
GND
GND
11-15Vdc
Notes
I^2 C bus
I^2 C bus
Dual use input. 1. Composite video in; 2.
Luminance in (when used with S or Component
Video). Must be selected with GMS Control Software
or through the front panel of the in-line camera
mount box
GND for composite video
Dual use input. 1.Chroma video (when used with Svideo); 2. Pr (red component when used with
Component Video). Must be selected with GMS
Control Software or through the front panel of the inline camera mount box.
GND for chroma video/Pr component
Blue component when used with Component Video.
GND for Pb component
GND
Input power to unit
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6.1.2
15
16
17
18
19
20-29
30
Not connected
USB power, Reset
USB Data USB Data +
USB Gnd
Not connected
PA_Shut_DN
31
32
33
34-36
37
38
39
RS232 Control Tx
RS232 Control-Rx
RS232 GND
Not connected
Audio right +
Audio right Audio right line opt.
40
41
42
43
Audio right GND
Audio left +
Audio left Audio left line opt
44
Audio left GND
Provides TTL level [+3V] signal for control of external
PA
Pin 39 is connected to pin 38 for audio right channel
input impedance of 600 ohms , balance in (mic or line
level)
Pin 43 is connected to pin 42 for audio left channel
input impedance of 600 ohms; balance in (mic or line
level).
Frequency Select Switches
There are four external rotary switches mounted into the chassis of the MDT-B (see
Figure 2). They are used to control RF frequency selection. Frequency selection can also
be controlled through GMS control software; see section 6. The rotary switches can be
disable or enable using GMS control software; refer to section 6.3.3.2 under
Configuration/Special Setup/Others. The most significant switch (SW100) represents
1000MHz (0-9) units, the second switch (SW101) represents 100 MHz (0-9) units, the
third switch (SW102) represents 10 MHz (0-9) units and the fourth switch (SW103)
represents 1 MHz (0-9) units. Hence the highest switch selection can be 9999 MHz and
the lowest is 0000 MHz. For example with the switches in the following positions, the
frequency will read 2014 MHz:
SW100
9 0 1
8
7
6 5
2
2
3
4
9 0 1
8
7
6 5
0
2
3
4
9 0 1
8
7
6 5
1
2
3
4
9 0 1
8
7
6 5
4
2
3
4
And with the switches in the following positions the frequency will read 924MHz:
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SW100
9 0 1
8
7
6 5
2
3
4
0
9 0 1
8
7
6 5
9
2
3
4
9 0 1
8
7
6 5
2
2
3
4
9 0 1
8
7
6 5
4
2
3
4
Note the following: if the switches are selected for a frequency outside the range of the
frequency band of the MDT-B: the transmitter will default to the high side of the frequency
band if the switches are set for a frequency higher than the transmitter frequency band. It
will default to the low side of the frequency band if the switches are set for a frequency
lower than the transmitter frequency band.
6.2
MDT-B Inline Camera Unit (optional)
Balance
audio,
A1&A2
DB-15
Connector
BNC J8 = Pb when
used with
Component video.
BNC J7 = SDI
or ASI input.
BNC J2=Chroma C
video input when
used with S-video.
When used with
Component video =
BNC J3, Y/COMP
=Composite video
input. When used with
S or Component video
= Luminance input
RF out
Power
“on/off”
switch.
LCD panel with controls
Figure 3 - MDT-B Inline Camera Unit
6.2.1
MDT Inline Camera Mount Connectors
There are four BNC connectors, two audio XLR, one DB-15 connector, one N type connector
and one rocker on/off power switch located on the MDT inline camera unit for interfacing the
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RF, audio, video, power and RS-232 signals. An optional LCD control front panel is also available.
Inline camera mount is shown in Figure 3.
6.2.1.1
RF Output
The MDT in line camera enclosure uses a female N type connector (flange mount) for its
‘RF Output’ port.
Note: Transmitters should not be powered on without a load. Doing so could
cause the output PA to stop working.
6.2.1.2
I/O
The ‘I/O’ connector is a female, DB-15. It is used to provide the interface for RS-232
signals (control and monitoring). GMS MDLB Configurator software program (as
explained in section 6) makes use of the RS232 control lines, pins 2, 3 and 5 of the DB-15
connector. The RS-232 channel utilizes a 3-wire configuration. The pin out for I/O
connector is shown in Table 2.
A USB connector is currently provided with the external serial cable for future update
capabilities which are currently under development. The USB will be an alternate
method of interfacing to the PC if DB-9 connectors are not available.
Table 3 - I/O DB-15 Connector Pin Out
Pin
1
2
3
4
5
Not connected
RS232-GND
6
7
8
9
10
11
12
13
14
15
I^2C_D
I^2C_C
USB Reset
USB Data USB Data+
USB GND
Not connected
RS232-Tx (DATA)
RS232-Rx (DATA)
RS232-GND
6.2.1.3
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Signal
+12Vdc
RS232-Rx (CTRL)
RS232-Tx (CTRL)
Notes
Relative to MDT (i.e., control data is input on this pin)
Relative to MDT (i.e., control data is output on this
pin)
Common ground for both RS232 Data and Control
lines
+5V
Video Input
The MDT –B in-line camera enclosure uses female BNC connectors for video input.
Component, Composite or S-Video input is accepted (see section 6 for setting video
input type). J3 BNC connector marked “Y/COMP” is a dual use input connector; a)
Composite Video or b) Luminance when used with Component video. J2 BNC connector
marked “C/Pr” is a dual use input connector; a) Chroma when used with S-Video or b) Pr,
the red component minus the luminance information used with Component Video. J8
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BNC connector marked “Pb” is the blue component minus the luminance information
used with Component Video.
6.2.1.4
Power Switch
An LED indicator rocker switch is provided for controlling power to the unit.
6.2.1.5
LCD Display
An optional LCD display with a front control panel is available for the inline camera
mount unit. Many of the control functions which are normally handled through the
software interface and a PC can now be accessed directly with the front control panel
and displayed on the LCD such as changing frequencies, checking video lock status
among many others.
6.2.1.6
SDI/ASI Input (optional)
A BNC connector is provided for Serial Digital Interface or Asynchronous Digital
Interface input data streams.
7.0 Software Overview
Configuration, control and monitoring of the MDT-B unit are done by using GMS’ optional (sold
separately) MS Windows-based MDL_B Configurator software program. This Graphical User Interface
(GUI) program provides the end user with a straightforward way to interface with the MDT-B unit.
During normal operation, once a MDL-B link is established, the MDL_B Configurator GUI does not need
to be active and can be disconnected from the MDT-B unit.
7.1
System Requirements
The MDL_B Configurator program has been developed and tested on Windows 2000, Windows XP
and Windows NT. Although the MDL_B Configurator program may work properly on other
operating systems, only the Windows 2000, Windows XP and Windows NT environments have
been used at GMS and no support or assistance can be provided concerning other operating
systems.
7.2
Installation
The following instructions outline the installation process for the MDL_B Configurator program:
1. Insert provided CD-ROM into computer.
2. Click on ‘setup.exe’ file. This will launch the GMS_MDL Setup program and several initial
setup files will begin to be copied onto the computer.
3. After the initial setup files are copied over, the GMS_MDL Setup program will prompt the
user to close any applications that are running. Once all other programs are exited, click on
the ‘OK’ button.
4. The GMS_MDL Setup program will prompt the user to click on the ‘computer icon’ button
to begin installation. If desired, the user can change the destination directory from the
default. Click on the ‘computer icon’ button.
5. The GMS_MDL Setup program will then prompt the user to ‘Choose Program Group’. If
desired, the user can change the program group from the default. Click on the ‘Continue’
button.
6. After quickly installing the MDL Configurator program, the GMS_MDL Setup program will
put up a window indicating that setup was completed successfully. Click ‘OK’.
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7.3
MDL_B Configurator Functions
The MDL_B Configurator program provides the user access to many different configuration,
control and monitoring options. When the MDL_B Configurator program is launched, the screen
shown in Figure 4 is displayed. The user should first select the serial port their computer is
connected to via the Serial Port Selector and Status region. If the selected serial port is valid, the
gray-colored status box will show ‘Ready’. The Device Selector region allows the end user to
choose to interface to a MDT-B or MDR-B unit. To configure a MDT-B, select the ‘MDT-B’ box in
the Device Selector region. Once the ‘MDT-B’ box is selected, the screen shown in Figure 5 is
displayed. The MDT-B Configurator program contains function buttons and all the configurable
settings available on a MDT-B. The following sections explain, in detail, the various options.
Figure 4 - MDL_B Configurator Main Screen
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Figure 5 - MDT Configurator Main Screen
7.3.1 Function Buttons
• “Enable All” Button: Clicking on this button enables all the check boxes on the screen. This
operation is done to prepare all the fields to be written to (or read from). Alternatively, the end
user can individually select a given field by using the mouse and clicking its corresponding
check box.
•
“Disable All” Button: Clicking on this button disables all the check boxes on the screen. This
operation is done to inhibit all the fields to be written to (or read from). Alternatively, the end
user can individually deselect a given field by using the mouse and clicking its corresponding
check box.
•
“Query” Button: Clicking on this button performs a read operation on all the fields that have
their check box enabled. Once clicked, all the selected fields will be read back reflecting their
current configuration.
•
“Update” Button: Clicking on this button performs a write operation on all the fields that
have their check box enabled. Once clicked, all the selected fields will be written to with the
value denoted in their respective field.
•
“CLR” Button: Clicking on this button clears out all fields on the screen, regardless of whether
the fields’ check boxes are selected or not. This button proves useful when the end user wants
to verify that a write operation has been correctly performed. An example scenario would be
to 1) enable all fields, 2) change desired field(s), 3) perform a ‘Update’ (write) operation, 4)
perform a ‘CLR’ operation and 5) perform a ‘Query’ operation. As a result of the ‘Query’
operation, the fields on the screen should all update to those values that were written during
the ‘Update’ operation.
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•
7.3.2
“Store All Setup Pages” Button: Clicking on this button will store all setup pages, even if
they are not shown.
Field Definitions
There are several different fields that can be configured by the MDT-B Configurator. The fields
located in the main screen of Figure 5 and their associated values are defined in Table 3 below.
Also noted in the table is whether the field is read, write-able or both
Table 4 - MDT Field Definitions
Field
Unit Name
Unit Number
RF Freq
(MHz)
Modulation
Mode
C-OFDM
Bandwidth
C-OFDM
Mode
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Mod Guard
Interval
R/W
Modulation
FEC
R/W
Channel Rate
(Mbps)
R
Input Mode
R/W
Video Input
R/W
Video Locked
Status
100-M0056X2B
R
Description
Allows the user to assign a unique unit name to the
MDT.
Allows the user to assign a unique unit number to
the MDT
RF output frequency. Desired frequency is entered
in MHz (i.e., 1.296GHz would be entered as 1296).
Modulation mode. Desired modulation mode is
selected from the following values: COFDM
(default) Off (shuts off modulation) or I/Q CAL ON
(puts unit in calibration mode).
COFDM transmit bandwidth. Desired bandwidth is
selected from the following values: 6, 7 or 8 MHz.
COFDM modulation type. Desired COFDM
modulation type is selected from the following
values: QPSK, 16 QAM or 64 QAM
Modulation guard interval size. Desired modulation
guard interval size is selected from the following
values: 1/32, 1/16, 1/8 or ¼.
Modulation FEC (Forward Error Correction) rate.
Desired modulation FEC rate is selected from the
following values: ½, 2/3, ¾, 5/6, 7/8.
Channel rate is displayed based on parameters
selected such as COFDM mode, FEC and Guard
Interval.
Choice between Analog video, SDI (serial digital
interface) or ASI (asynchronous digital interface)
Video input format. Desired video input format is
selected from the following values: PAL, NTSC w/
Pedestal, NTSC, S-video PAL, S-video NTSC, and
Component Video. Some of these choices may or
may not be shown in the pull down box
depending on which user profile has been loaded.
Analog video lock status. This read-only field
indicates that the MDT-B has line-locked onto the
analog video input signal [not applicable when the
“Input Mode” is set to either SDI or ASI]
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Field
Audio Enable
•
7.3.3
R/W
Description
Analog audio encoder enable. Desired mode of
*
R/W operation of the audio encoder is selected from the
following values: Off or On.
*
Choice between mute or un-mute audio stream
R/W
Audio Mute
*
R/W Choice between mic or line level audio
Audio Level
*
R/W Adjustable gain between 0- 100
Audio Gain
Not applicable for embedded audio applications.
Pull-Down Menu Definitions
There are several different pull-down menus that are included in the MDT-B Configurator
program. Each of these pull-down menus contains further user-configurable options or
commands. The following sections describe these menus in detail.
7.3.3.1
File
This pull-down menu offers to exit the MDT-B Configurator program or to “Save
Parameters”. Alternatively the ‘X’ box in the upper right hand corner of the window can be
used to exit the program. And alternatively the “Store All Setup Pages” button on the main
menu will save all parameters.
7.3.3.2
Configuration
This pull-down menu contains several different configuration options. These are outlined
below:
Special Setup
o Load MPEG Encoder Profile (see figure 6) – This menu displays the current
profile loaded and also presents possible profiles to load. Select the profile from
the pull down box (or use the browse button to point to area where other
profiles are located). Then click on the “Download Profile” button. A progress
bar appears which shows the profile loading. After the profile has been
downloaded it’s necessary to click on the “Store all Setup” button for the profile
to be saved. Once the profile is stored a message box appears indicating the
profile is stored. If the message box states the process failed then click on the
“Store All Setup” button again. Repeat until the message box indicates the
profile is stored.
o Others (see figure 7)- This menu displays the following:
RF Output attenuation – The RF out can be attenuated in 0.5 or 1 dB
increments up to defined max. Both increment step and max value are
frequency band dependant.
COFDM Spectrum Inversion choices include normal or invert. The
transmitter is configured with the receiver it ships with and the
inversion mode shouldn’t have to be changed. However if a different
receiver is used the inversion mode may have to be changed. Some
receivers will accept either inversion mode. Check the parameters of the
receivers to ensure the correct inversion mode is selected.
RF Power Mode-Can be used to put transmitter in a sleep mode, a low
power mode where the encoder functions and many of the power
regulators are shut down enabling a saving in current when transmitter
is not active. The OFF state of the unit is displayed on the main window
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(see figure 7a). To have the unit in the desired RF Power Mode on
Power up, it is necessary to store settings in the Others window. If the
settings are stored in the main page, the state of the RF Power Mode
will not be saved.
Frequency switch – choices offered are enabled or disabled. These
are the four frequency select switches discussed under section 5.1.1.3.
If disabled the switches will not respond to changes (frequency changes
could still be accomplish by changing the “RF FREQ (MHz”) field in the
GMS MDLB control software. Enabling them allows the frequency to be
changed when the switches are changed. Factory default enables the
switches (keep in mind that you must click on the “Store All Setup
Pages) for the choice to take place.
Video Filter Type-Pull down box offers various filter types for
optimizing picture. The choices include: LPF OFF, LPF C, LPF Y, LPF YC.
Video Filter Frequency- Pull down box offers various filter
frequencies for optimizing picture. The choices include: AUTO,
12.15MHz, 10.6MHz, 9.45 MHz, 8.1 MHz and 6.75 MHz.
Transport Stream (see figure 8) – The transport stream menu displays the
parameters of the current transport stream (of the transmitter). The fields are
read/write-able. Normally the fields require no manipulation and should work quite well
as defaulted from the factory. However, high end users may have a need to change the
transport stream parameters.
Ctrl Port Baud Rate- The control port baud rate menu allows different baud rates to
be selected when attached to the PC RS232 port. Some computers may need the baud
rate adjusted for optimal communications
Factory Setup – The menu is for factory use only.
Figure 6 - Select MPEG Encoder Profile
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Figure 7 - Others
Figure 7a – RF Power Off
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Figure 8 - Transport Stream Setup
7.3.3.3
Help
This pull-down menu contains information about the MDT firmware and the MDL
Configurator software. This information is outlined below:
Channel Rate Guide: This selection pulls up a table which displays the relationship
between the Modulation mode, Modulation Guard Interval and FEC mode. Table values
will change depending on COFDM Bandwidth selected. See figure 9.
FW version: This selection pulls up a window that displays the MDT-B current Profile
Index (current loaded profile), the Profile Description, the Software Version, the FPGA
Version and Serial Number. See Figure 10.
About: This selection pulls up a window that displays the Version Number of the GMS
MDL_B Configurator program.
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Figure 9 - Channel Rate Guide
Figure 10 - FW Version
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8.0 Specifications
The following sections outline the overall specifications for the MDT unit.
8.1
Video Encoding
Interfaces: SDI, Component, Composite or S-Video Input
Standards: NTSC or PAL
Compression Standard: MPEG-2 (per ISO/IEC 13818-2)
Profiles: 422P@ML, MP@ML, SP@ML
Video Bit Rate: 2Mbps to 15Mbps (MP@ML)
3Mbps to 25Mbps (422P@ML)
Chrominance Profile: 4:2:2 or 4:2:0
Line Standard: NTSC: 525 or 480
PAL: 625 or 576
Horizontal Resolution: 720 pixels
Vertical Resolution: 480 (525 line) and 576 (625 line)
System Latency end to end delay: <80ms (super low latency mode)
8.2
Audio Encoding
Analog Audio: Dual, Line-Level or Mic-Level, Differential or Single-Ended, Clip Level 12dBm
Impedance: 600 Ohms input impedance (changeable to 2K Ohms)
Compression Standard: MPEG layer II
Audio Enable: On or Off
Bit Rates: Up to 384kbit/s/ch
Sampling Frequency: 32 kHz, 44.1 kHz or 48 kHz
THD: < 0.1% maximum
Response: 20 Hz to 12 kHz, +/- 0.25 dB
Crosstalk: >55dB minimum
S/N: >60 dB RMS
8.3
Transport Stream
Standard: per ISO/IEC 13818-1
Packet Size: 188 byte
Bit Rate: Automatically set from active service settings.
ASI Input: Allows MPEG2 transport stream to be inserted into the MDT-B through the BNC
connector
8.4
RS-232 Interfaces/RCU
Control Port: 3-wire interface (Tx,Rx,Gnd)
RCU A remote portable control unit is also available
Note: A USB interface is also available that serves the same purpose as the RS232 control
port. In addition a “Data” RS232 channel is available which is dedicated for low-rate data to be
transmitted along with the audio and video.
8.5
COFDM RF Output
Output Frequency: 1 to 6 GHz (In-Bands)
Frequency step size is 500 KHz for all bands except S2 (1999-2500 MHz) which is 250 KHz.
Bandwidth: Selectable 6, 7 or 8 MHz
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Output Power: Up to100mW (programmable) [200mW on some models]
Connector: SMA-F
Note: Transmitters should not be powered on without a load. Doing so could cause
the output PA to stop working. A proper heat sink is also required.
8.6
Modulation
Modulation Type: COFDM w/ QPSK, 16 QAM or 64 QAM
FEC: ½, 2/3, ¾, 7/8
Guard Intervals: 1/32, 1/16, 1/8, 1/4
Spurious: 50dBc
Number of C-OFDM Carriers: 2k
C-OFDM MER: > -45dB
Standard: DVB-T compliant
8.7
Power
MDT (Frequency 1 to 6GHz In-Bands
DC Input Voltage Range: 9 to 15 VDC
Power Consumption: 10Watts
8.8
Physical Dimensions (without mating connectors)
MDT (Frequency 1 to 6GHz In-Bands
Size: 3.25 in. (W) x 4.5 in. (D) x 1.76 in. (H)
(8.26 cm x 11.43cm x 4.47cm)
Weight: 13.4 oz
(380.5grams)
8.9
Environmental
Operational Temperature: -10 to +70 °C
Humidity: Up to 100% (non-condensing)
.
9.0 The D/C (Down Converter)/IF frequencies explained
9.1
•
If Frequencies
MDR-B receivers (and many other digital receivers) are capable of receiving direct frequencies in
the range of approximately 49 MHz to 861 MHz. If the transmitter is not in this range then a
down-converter is used to convert the frequency to this range. The frequency out of the downconverter is called the IF (intermediate frequency) which is fed to the receiver.
Down-converters have a LO (local oscillator) which is mixed with the transmitter frequency (MDTB) and converts it to the IF frequency. MDR-B receivers need to know the LO (local oscillator) of
the down-converter and is factory programmed with this information. It then automatically
calculates the IF frequency once the RF (transmitter frequency) is entered. Thus as the desired RF
frequency is dialed in on the MDR-B the IF is taken care of automatically. For example, if the
transmitter frequency (MDT-B) is set for 2000 MHz, then the MDR-B can be set for 2000 MHz (it
automatically calculates the IF frequency based on pre-programmed LO information of the downconverter). The IF frequency changes as the RF frequency changes, the LO remains constant.
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On non-GMS receivers it may be necessary to program the receiver with the IF frequency directly.
The user may have to do the simple math to arrive at the IF frequency so that it can be entered into
the receiver. The down-converter LO must be known. The math involve is as follows: “ LO –
transmitter frequency (or transmitter frequency – LO) = IF frequency”. For example, it the
transmitter is set for 2000MHz and the LO of the down-converter is 2800MHz then the IF
frequency is 800MHz (2800-2000 = 800). The receiver will need to be set to 800MHz to receive the
transmitter frequency of 2000MHz. Each time the transmitter frequency is changed the IF must be
re-calculated and entered into the receiver. It must also be mentioned, as you may have noticed
with the equation “LO-transmitter frequency or transmitter frequency – LO” that two answers are
possible. For example 2800-2000 = 800 or 2000-2800 = -800. The negative answer may indicate
the receiver wants the signal to be inverted. See section 6.3.3.2 for inverting the signal.
9.2
Local and Remote Power
Customers have the option of using remote or local power:
• Remote power is provided from the receiver through the BNC connector IF IN #1 located on the rear
panel (and IF IN #2 in the case of diversity systems with two down converters). IF PWR # 1 (and IF
PWR #2 in case of diversity systems) needs to be switched ‘ON’. From the front control panel of the
receiver (MDR-B) toggle through the menus until “R1 BDC POWER DISPLAY’ (or “R2 BDC POWER
DISPLAY” in the case of diversity systems) is displayed. Ensure “ON” is selected (this the default mode
when shipped with D/C .The +12 Vdc provided from the receiver will travel through the coax cable to
the D/C.
If the D/C is located relatively close to the receiver then using remote power makes sense. However, if
the D/C is located at great distances away from the receiver there may be excessive DC voltage drop in
the coax cable (due to cable resistances). If this is the case then local DC power should be considered
as discussed below. If unsure of the DC voltage drop measure the DC voltage present (using a DMM) at
the end of the coax cable run. The D/C normal operating voltage is approximately +12 Vdc but can
operate down to +10 Vdc.
•
Local power is provided by applying +12 Vdc to pin 1, GND to pin 3 of the DB-9 connector located on
the bottom of the D/C. The +12 Volt power supply must be able to source at least 500mA. The power
switch (located on the side of the D/C) enables the user to control the ‘ON’/’OFF’ positions for local
power. If using local power then the remote power IF IN #1 should be set to “OFF” (and RF IN #2 in
case of diversity systems).
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Power Switch
for local
RF Input
BNC connector – IF frequency
output
DB-9 connector for local
power
Figure 11 - BDC Connectors
Table 5 - DB-9 Connector Pin Out for the D/C
Pin
1
3
2, 4-9
10.0
Signal
+12Vdc
GND
NC
Notes
Power supply must be able to source at least
500mA. Voltage should not drop below +10Vdc.
Power ground
Not Connected
Cable Losses
10.1 Coax Cable
Cable losses must be taken into consideration if the D/C is located a great distance from the
receiver. As mentioned above long cable runs can contribute to more resistance in the lines and also
can contribute to signal attenuation because of the additional capacitance. Even when using a good
coax cable such as RG59/U the attenuation of the signal can be significant. For example, RG59/U
coax will drop approximately 2 dB per 100 feet at 50 MHz and 8 dB per 100 feet at 900 MHz. The
intermediate frequency (IF) in this system can fall between 49 MHz to 850 MHz. Cable losses in this
range for an RG59/U are shown below in table 5. An inline amplifier matching the cable losses should
be considered if losses exceed 6 dB.
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Table 6 - RG59/U Coax Cable Losses
•
Belden cable # 1426A
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Appendix A – Cable, MDT-B External Breakout for Broadcast Version
REVISIONS
NOTES:
1. REFERENCE BOM 780-C0224X2 FOR REFERENCE DESIGNATIONS (SHOWN AS [] ON DRAWING) AND PART DESCRIPTIONS .
2 LABEL FINAL CABLE ASSEMBLY WITH PART NUMBER 780-C0224X2 USING BEST COMMERCIAL METHOD.
3 LABEL CONNECTOR WITH REFERENCE DESIGNATOR AND DESCRIPTION AS SHOWN USING BEST COMMERCIAL METHOD. LABEL
TO BE WITHIN 3.0 OF CONNECTOR.
4 REFERENCE MANUFACTURING INSTRUCTION 100-MI0112.
ECO
REV
DESCRIPTION
DATE
E0355X1
X1
INITIAL RELEASE
01/19/04 SLP
E0355X3
X2
Correct polarity marks of USB, pins17&18
APPROVED
11/9/05 TG
5 THIS CABLE IS SET-UP FOR BALANCED AUDIO ONLY.
P100
5
5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
DATA-TX
RED
DATA-RX
WHT
GND
BLK
N/C
N/C
N/C
CVBS/Y
GND
C/Pr
GND
Pb
GND
GND
BLK
RED
11-15VDC
N/C
RED
USB RESET
WHT
USB DATA GRN
USB DATA +
BLK
USB GND
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
RED
CTRL-TX
CTRL-RX
WHT
GND
BLK
N/C
N/C
N/C
AUDIO1 (RIGHT) +
AUDIO1 (RIGHT) -
RED
WHT
BLK
1
2
3
4
5
6
7
8
9
P3
DATA 3
W5
W1
P1 CVBS/Y
3
W2
P2 C/Pr 3
P7 Pb 3
W4
W3
USB
BLK
J1
RED
J2
DC
POWER
3
USB 3
W6
RED
WHT
BLK
W7
W7
RED
GND
AUDIO2 (LEFT) +
AUDIO2 (LEFT) -
RED
BLK
RED
BLK
GND
GND
P4
CTRL 3
2
3
1
P5
AUDIO1 3
2
3
1
P6
AUDIO 2
W7
BLK
RED
BLK
GND
W7
BLK
6
7
8
9
W7
RED
RED
BLK
GND
1
2
3
4
5
GND
FIGURE 1
CABLE WIRING
DIAGRAM
TOLERANCES
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN INCHES
DO NOT SCALE DRAWING
LINEAR
X.X = ± 0.5
X.XX = ± 0.125
X.XXX = ± 0.020
ENG/TECH
DRAWN
ENG
PROD
QC
3
T. Giotta
gnd/shield
DWG TITLE
SLP
CABLE, MDT2-B EXTERNAL BREAKOUT FOR
BROADCAST VERSION
GMS Products
SIZE
DATE
DWG NO
REV
B
11/9/05
100-C0224X2
X2
SCALE:
NONE
SHEET
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