COBHAM Messenger Portable Decoder User Manual
User’s Manual
The most important thing we build is trust.
Messenger Portable Decoder
(MPD)
Cobham Surveillance
GMS Products
1916 Palomar Oaks Way Ste 100
Carlsbad, CA 92008
100-M0081X1 T: 760-496-0055
05/18/09 F: 760-496-0057
www.cobham.com/gms
TABLE OF CONTENTS
1 INTRODUCTION ........................................................................................................................................................ 3
2 TECHNICAL SPECIFICATIONS ....................................................................................................................... 3
3 MPD LOCAL CONTROL ........................................................................................................................................... 6
3.1 MPD Controls, Indicators and Connectors ................................................................................................. 6
3.1.1 Panels and Keys .................................................................................................................................................. 6
3.2 Operating Instructions – local .......................................................................................................................... 7
3.2.1 Standalone Operation without OSD ......................................................................................................... 7
3.2.2 Standalone Operation with OSD ................................................................................................................ 7
4 REMOTE OPERATION ............................................................................................................................................. 8
4.1 USB Driver Installation ......................................................................................................................................... 8
4.2 MPD Windows Control Panel Software ........................................................................................................ 9
4.3 MPD Serial Port Communication Protocol .............................................................................................. 14
4.3.1 Protocol Format .............................................................................................................................................. 14
4.3.2 Command, Acknowledge and Warning ............................................................................................... 16
4.3.3 MPD Serial Port Communication Protocol - Quick reference ................................................... 25
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1 Introduction
Messenger Portable Decoder (MPD)
MPEG-2 Digital Audio/Video Decoder
MPD
Key Features
Broadcast Quality 4:2:2 MPEG-2 Decoder
Low Delay
Compact Design
MPD with MSR Mounted
Designed to mate with MSR
Runs on 12VDC
The GMS Messenger Portable Decoder (MPD) is a compact professional 4:2:2 MPEG-2 digital audio/video
decoder that is designed to be a companion to GMS’ MSR Diversity Receiver. A mounting plate is provided
that allows the MSR to be mounted on top of the MPD. Two fans in the MPD provide cooling for both the
MPD and the MSR. The ASI output of the MSR is feed into the MPD, which receives the MPEG2 TS stream,
decodes it and output signals via analog video/audio ports, SDI/AES ports. These units can be controlled
via either the RS-232C or USB control ports. An optional 19-inch Rack-Mounted shelf is available that can
mount up to two MPD/MSR in just 5.25” of rack space. Additionally, an optional in-line AC/DC power
supply is available.
When used in conjunction with GMS’ MDT-B transmitter and MSR receiver, system latencies down to 2-3
frames are provided. The combination of Broadcast Quality Audio/Video and ultra-low latency make this
system perfect for sports and ENG applications!
2 Technical Specifications
Audio/Video Decoding
Support ISO13818-1 TS demultiplexing (up to 32PID)
Support ISO13818-2 (Main Profile @ Main Level and 422 Profile @ Main Level) video decoding
Support ISO11172-3 and ISO13818-3 audio decoding, provide simultaneous 2 pairs of stereo (4
channels) decoding
Support graphic display up to 16 bits/pel (OSD)
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Transport Stream
Input
Type: DVB-ASI via BNC-F (Rear Panel)
Rate: 1 b/Sec to 213 Mb/Sec
TS Demultiplexing: In accordance with ISO13818-1 with up to 32 PIDs.
Output
Type: DVB-ASI loop via BNC-F (Rear Panel)
Rate: 1 b/Sec to 213 Mb/Sec
Video Decoding
Type: MPEG-2
Standard: Supports ISO13818-2
Profiles: Main Profile @ Main Level, Simple Profile @ Main Level and
422 Profile @ Main Level
Decoding Rates: 4:2:2 P@ML(1.5-50MHz)
4:2:0 MP@ML(1.5-15MHz)
4:2:0 SP@ML(1.5-15MHz
)
GOP Length: From adapt to input TS
Video Outputs
Analog Video
Interface: Qty 2 CVBS w/OSD (Rear – BNC-F, Front – BNC-F)
Video Format: PAL-B/G/I/M/N/D, NTSC, and SECAM L/B/G/K1
Screen Proportion: 4:3/16:9
Graphic Process: OSD,
Support graphic display up to 16 bits/pel (OSD)
Synchronization Information (Via DB-9M on rear panel)
Video Synchronous Output SYNC Synchronous line/field/frame output
Synchronous lock output
27M reference clock output
Audio Outputs
Analog Audio: 2 channels stereo, balanced via XLR-M on rear panel
2 channels stereo, un-balanced via RCA-F on front panel
Digital Audio: 1 channel of AES/EBU-SPDIF via BNC-F on rear panel
Status Indicators (Front Panel)
LEDs: On/Standby, Decoder Lock Status, ASI Signal Present
Control
RS-232C via DB-9M on rear panel
USB-1 via USB-Type A on rear panel
Software: MS Windows Graphical User Interface Application
(Windows 2000 & XP compatible.)
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Electrical Features
Power Supply: 9 to 17 VDC ( External In-Line AC PWR Supply Optional)
Power Consumption: < 45W
Pin1 and Pin 6 (9-17VDC)
Pin 5 and Pin 9 (GND)
Physical
Dimensions: 8.5” (W) x 8.5” (D) x 1.0” (H)
21.6 cm x 21.6 cm x 2.54 cm
Weight: 3.65 lbs ( 1.656 kg)
Environmental Conditions
Operating Temperature: 0
C 50 C
Storage Temperature: -20 C 80 C
Comparative Humidity: 10% ~ 90%, non-condensing
Digital Video
Interface: Qty 1 - SDI via BNC-F
Audio Decoding
Standard: Supports ISO11172-3 and ISO13818-3 audio decoding
Number of Outputs: simultaneous 2 pairs of stereo (4 channels) decoding
Audio Outputs
Analog Audio: 2 channels stereo, balanced via XLR-M on rear panel
2 channels stereo, un-balanced via RCA-F on front panel
Digital Audio: 1 channel of AES/EBU-SPDIF via BNC-F on rear panel
Status Indicators (Front Panel)
LEDs: On/Standby, Decoder Lock Status, ASI Signal Present
Control
RS-232C via DB-9M on rear panel
USB-1 via USB-Type A on rear panel
Software: MS Windows Graphical User Interface Application
(Windows 2000 & XP compatible.)
Electrical Features
Power Supply: 9 to 17 VDC ( External In-Line AC PWR Supply Optional)
Power Consumption: < 45W
Pin1 and Pin 6 (9-17VDC)
Pin 5 and Pin 9 (GND)
Physical
Dimensions: 8.5” (W) x 8.5” (D) x 1.0” (H)
21.6 cm x 21.6 cm x 2.54 cm
Weight: 3.65 lbs ( 1.656 kg)
Environmental Conditions
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Operating Temperature: 0 C 50 C
Storage Temperature: -20 C 80 C
Comparative Humidity: 10% ~ 90%, non-condensing
3 MPD Local Control
3.1 MPD Controls, Indicators and Connectors
3.1.1 Panels and Keys
Front Panel:
Where:
POWER :Power Switch
PWR :Power On/Standby Indication
TS :ASI Signal Present Status
LOCK :Decoder Lock Status
1/R :Analog Audio Signal /Channel 1 /Right
1/L :Analog Audio Signal /Channel 1 /Left
1/CVBS :Composite Video Broadcast Signal, Channel 1
Rear Panel:
Where;
ASI IN :Asynchronous Serial Interface Signal Input
ASI OUT :Asynchronous Serial Interface Signal Output
SDI :Serial Digital Interface Digital Video Output
AES :Advanced Encryption Standard digital Audio Output
2/CVBS :Composite Video Broadcast Signal, Channel 2
2/R :Analog Audio Signal /Channel 2 /Right
2/L :Analog Audio Signal /Channel 2 /Left
CTRL1 :RS232 Interface
CTRL2 :USB Interface
POWER :DC Power Line
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MPD has three status indicators and analog A/V output interfaces on the front panel, and various
interfaces on the rear panel. There are power switch, power/standby, TS and Lock indication LEDs and
analog A/V output interfaces of channel 1 on the front panel. There is a pair of DVB ASI interfaces on the
rear panel for receiving MPEG-2 TS and loop back. The rear panel provides analog A/V output interfaces of
channel 2 and digital A/V interface. RS232 interface on the rear panel is for upgrading micro-code and
sending out test signal comprised 27 MHz clock and h/v sync. . All kinds of local control and operation can
be executed through RS232 or USB interface.
3.2 Operating Instructions – local
For single-program Transport Streams (TSs), like those that are typically output from GMS’ Wireless
Audio/Video Links, the Messenger Portable Decoder (MPD) is a plug & play device. It will automatically
select and decode any compliant compressed Video or Audio and provide uncompressed outputs. With
the OSD function turned-off, the user can monitor status via the MPD’s Front Panel LEDs. With the OSD
function turned on, the video output provides additional information on the incoming stream. See Section
3.2.2. The OSD function and all other MPD controls can be controlled using the MPD M.S. Windows
Control Panel Software. See Section 4.
3.2.1 Standalone Operation without OSD
Before activating MPD, please carefully check all the cable connections and ensure that the appropriate
power supply voltage (+12 VDC) is applied to the unit. Connection between RS232 or USB interface and
PC is not necessary, which is generally used when micro-code is to be updated and operational parameters
need to be set by remote control application.
Once power is on, MPD begins its self-examination and initialization, which may take a few seconds. At
this time, the monitor displays blue screen. It is normal even if the screen jitters a little. As initialization and
self-examination finish, MPD will setup initial parameters from flash and check the status of ASI input port.
Should relevant unit and TS parameter setting turn out correct, both image and sound will be shown.
Otherwise, black screen appears and the MPDs PID analysis operations will be run until a properly
formatted TS is supplied to the MPD’s ASI input
3.2.2 Standalone Operation with OSD
Before activating MPD, please carefully check all the cable connections and ensure that the appropriate
power supply voltage (+12 VDC) is applied to the unit. Connection between RS232 or USB interface and
PC is not necessary, which is generally used when micro-code is to be updated and operational parameters
need to be set by remote control application.
The MPD has a clear-cut and automatic OSD display. Users will easily find out operation information
according to the decoder.
OSD Screen structure is given as:
PROGRAM 01/03 Table Tennis
TS Lock ! MP @ ML SAMP 44100 SPS PAL
PID VID: 0x006F A1: 0x0070 A2: 0x1FFF
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The working status of MPD is determined by input TS signal from ASI interface. As MPD is powered-on for
the first time, the system will automatically pick up original set-up parameters and examine the input TS.
Users can modify the original set-up parameters to get a new set of parameters using the M.S. Windows
Remote Control Software. See Section 4. As MPD is powered on next time, the system will pick up the
user’s parameters. Users, of course, can either recover original parameters or re-modify the parameters.
Once power is on, MPD begins its self-examination and initialization, which may take a few seconds. At
this time, the monitor displays blue screen. It is normal even if the screen jitters a little. As initialization and
self-examination finish, MPD will setup initial parameters from flash and check the status of ASI input port.
Should relevant parameter setting turn out correct and ASI connects ready, both image and sound will be
shown. Otherwise, black screen appears and PID analysis operations need to be run under background.
PID searching:
MPD has PID searching function. MPD will go to the following operations:
1) Check ASI input signal
2) Set PID filters and get PAT and PMT information
3) Set A/V decoder parameters. If PID searching turns out all right, A/V signal will be
played. The results of PID searching and other mode information are given as:
PROGRAM 01/03 Table Tennis
TS Lock ! MP @ ML SAMP 44100 SPS PAL
PID VID: 0x006F A1: 0x0070 A2: 0x1FFF
Where:
PROGRAM 01/03 :display the number of program streams found in the Transport Stream.
The first program will be decoded automatically.
Table Tennis :display the service_id information defined in the SDT.
TS Lock ! :ASI link is stable, otherwise display No TS message
MP @ ML :main profile @ main level / 422 profile @ main level
SAMP 44100 SPS :audio sample ratio 44.1k/48k/32k
PAL :Video mode PAL/NTSC
PID VID: 0x006F :video PID, Video signal output from front and rear panel have
same PID
A1: 0x0070 :audio PID. Audio 1 always output from front panel.
A2: 0x1FFF :audio PID. Audio 2 always output from rear panel.
*A/V PID value can be manually set by M.S. Windows Control Application as well. MPD
will retain new parameters after change.
4 Remote Operation
4.1 USB Driver Installation
Findpre‐installUSBdriversfileunder\..\current_driver\setup.exe
Run setup.exe.
This operation will install pre-install software V1.16 to your PC.
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Press “Install”, then wait till the install process finishes.
After finishing pre-install driver, user can connect USB cable to MPD. This time new message windows
will pop up. OS finds a new hardware.
Wait for OS to close all message windows.
After completely install USB driver, user can configure USB to UART port as your wish
4.2 MPD Windows Control Panel Software
MPD Control panel software is only a demo program for MPD serial port communication protocol.
System Requirements:
PC with free ASC0 channel or free USB channel
Windows 95 and above, Windows NT 4.0 and above
One serial cable or USB cable
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