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DT-504B
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
QUADRUPLE VIDEO / AUDIO ENCODER WITH
MULTIPLEXER AND COFDM OUTPUT
QUICK CONFIGURATION GUIDE
- 0 DG0089 -
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QUICK CONFIGURATION GUIDE. DT-504B.
QUICK CONFIGURATION GUIDE
DT-504B
1 INTRODUCTION
The DT-504B is a module able to generate a single transport stream
in COFDM format from several audio / video (A/V) analogue signals.
It has 4 Audio / Video analogue inputs. Each A/V input has three
RCA connectors, one for video signal (VIDEO) and two more for audio (right
and left audio).
Each A/V input is coded by means of the MPEG-2 compression
system. Then the resulting signals are processed by a multiplexer that
brings together all in one TS. This TS is serialized into DVB-ASI format and
modulated in a DVB-T output signal.
Subsequently, the DVB-T output signal can be inserted into a
television network with the advantages of robustness and high quality that
digital technologies offers.
At the bottom, the screen shows the Transport Stream (TS) Status,
the bitrate used in kilobit per second and the percentage of bitrate used
relative to total available.
The DT-504B module adjusts the compression rate to the total
bitrate available, using the modulation parameters.
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Figure 1.- DT-504B Configuration.
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QUICK CONFIGURATION GUIDE. DT-504B
1.1 SPECIFICATIONS
A/V inputs
Type 4 independent A/V inputs.
Connector 3 RCA-Female connectors for each input.
Video
Format PAL, NTSC.
Level 1 Vpp.
Impedance 75 Ω.
Audio
Mode Selectable Stereo / Mono / Dual / Joint Stereo.
Level 0.5 Vpp or 1.0 Vpp (selectable).
Impedance 10 kΩ.
Bandwidth 20 Hz to 20 kHz.
MPEG-2 Encoder
Video/Audio encoding
Format MPEG-2.
Video Bitrate According to DVB-T modulation parameters.
Audio bitrate From 32 to 384 kbps selectable.
Editable parameters Service Name, Service ID, Video PID, Audio PID,
Available measurements Total bitrate.
Multiplexor
Editable parameters Network name, NID, NID Original, TS ID.
DVB-T modulator
FFT Mode 2k, 8k.
Channel BW 6 MHz
Guard Interval 1/4, 1/8, 1/16, 1/32.
Code Rate 1/2, 2/3, 3/4, 5/6, 7/8.
Constellation QPSK, 16-QAM, 64-QAM.
Spectral Inv. ON, OFF.
1 connector (yellow) Composite video.
1 connector (white) Audio L.
1 connector (red) Audio R.
PMT PID.
(1)
, 7 MHz, 8 MHz.
(1)
Option on request.
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QUICK CONFIGURATION GUIDE. DT-504B.
RF Output (DVB-T)
Type 1 multiplex DVB-T.
Connector 75 Ω F-Type, Female.
Frequency margin Adjustable frequency between 474 and 875 MHz,
1 Hz step. (see Options for VHF band output).
Power level (average) 89 dBµV approx., without attenuation.
Variable attenuation from 0 to 33dB approx.,
1 dB step.
Frequency stability 10 ppm.
MER > 37 dB.
Phase noise SSB -87 dBc/Hz @ 2 kHz.
Configuration Through the DT-800 Control Module in local
(keypad) or remote mode (PC). (See DT-800).
Power supply Via the DT-800 Control and Power module.
Connector JST B08P-XL-HDS (Connecting Cable supplied
with the DT-800 module).
Voltage and highest
Consumption +12V 0,99 A;
+5 V 0,67 A.
Operating environmental conditions
Altitude Up to 2000 m.
Temperature range From 5 °C to 50 °C.
Max. Relative humidity 80 % (up to 31 °C), decreasing lineally up to
20 % at 50 ºC.
Mechanical features
Dimensions W. 50 x H. 262 x D. 230 mm.
Weight 1.17 kg.
Mounting Using DT-900 rack/wall mounting frame.
Included accessories
1 x CC024 BNC/BNC Cable 25 cm.
1 x CC027 BNC/BNC Cable 50 cm.
4 x 0 CO6718 Connector Adapt Aero BNC-H/RCA-M.
1 x 0 MI1714 Instruction for assembly and connection.
1 x 0 MI1934 Menu Tree.
1 x 0 DG0089 Quick configuration guide.
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QUICK CONFIGURATION GUIDE. DT-504B
Options
DT-504B-V VHF option.
Output frequency From 170 to 650 MHz.
DT-504B-S ASI option.
TS Output
Type 1 ASI-TS output.
Connector BNC female, 75 Ω.
Packets TS Packets of 188 bytes length.
DT-504B-CO01S 6 MHz option.
Channel Bandwidth 6, 7 and 8 MHz
Minimal configuration needed
1 x DT-800 Power and Control Module
1 x DT-900 Sub-rack framework to install in a rack or on a
wall.
RECOMMENDATIONS ABOUT THE PACKING
It is recommended to keep all the packing material in order to return
the equipment, if necessary, to the Technical Service.
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QUICK CONFIGURATION GUIDE. DT-504B.
2 SAFETY RULES
2.1 General
∗ The safety could not be assured if the instructions for use are
not closely followed.
∗ Use only with other DT series modules and for power supply and Control
those indicated at the Specifications.
∗ Remember that voltages higher than 70 V DC or 33 V AC rms are
dangerous.
∗ Use this instrument under the specified environmental conditions.
∗ The user is not allowed to perform changes inside the equipment. Any
change on the equipment must be done exclusively by specialized staff.
∗ Do not obstruct the ventilation system of the equipment.
∗ Use appropriate low-level radiation cables for input / output signals,
especially on high level signals.
∗ Follow the cleaning instructions described in the Maintenance
paragraph.
∗ Symbols related with safety:
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QUICK CONFIGURATION GUIDE. DT-504B
2.2 Maintenance
2.2.1 Cleaning Recommendations
CAUTION
To clean the cover, take care the instrument is disconnected.
CAUTION
Do not use scented hydrocarbons or chlorized solvents. Such
products may attack the plastics used in the construction of the cover.
The cover should be cleaned by means of a light solution of detergent
and water applied with a soft cloth.
Dry thoroughly before using the system again.
CAUTION
Do not use for the cleaning of the front panel and particularly the
viewfinders, alcohol or its derivatives, these products can attack the
mechanical properties of the materials and diminish their useful time of life.
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QUICK CONFIGURATION GUIDE. DT-504B.
3 NAVIGATION AND EDITION OF VALUES
3.1 Control Module
The DT-800 control module configures the DT-504B module:
1.- After assembling and connecting, turn on the DT-800. After
scanning, check the DT-504B module appears in the list of
unit control.
3.2 Navigating through the configuration menu
modules shown on the screen.
2.- Press ENTER to get into the Password option and enter the
access password (password by default “2008”). If the password is
right you will access to the configuration menu.
3.- Use RIGHT or LEFT to move among modules, until
finding the DT-504B. The LED “Program” of the DT-504B
module should be flickering when the module appears on screen.
4.- Press ENTER to get into the configuration option of the
DT-504B.
For more information, refer to the manual supplied with the DT-800
• Press the LEFT
options.
or RIGHT key to move between menu
• To get into a menu option, press the ENTER or DOWN
3.3 Editing a numeric field
key.
• To validate a change and exit, press the ENTER key.
• To exit without validating press the ESCAPE key.
1.- Press the ENTER key to get into a menu option.
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QUICK CONFIGURATION GUIDE. DT-504B
2.- Press the RIGHT or LEFT key to move the cursor
between digits. At the right of the screen, a number shows in
what position the cursor is (units, tens, hundreds or thousands).
3.- To change a digit press the UP or DOWN key.
4.- After editing the numeric field, press the ENTER key to
confirm and exit the option.
WARNING!
To VALIDATE a change you should press the ENTER or UP
key. If you press the ESCAPE
key, the change will not be
accepted.
3.4 Editing a text field
1.- Press the ENTER
2.- At the right of the screen, there is a letter and a number. The
number means the position of the character in the word you are
editing. The letter next to the number means the type of
character you are using (“A” for capital letters, “a” for small
letters, “@” for symbols and “1” for numbers).
3.- Press the RIGHT
characters in the word. To delete a character press the RIGHT
or LEFT key for one second.
4.- To change a character, press the UP or DOWN key. To
change the type of character (capital letters, small letters,
symbols or numbers) press the UP
one second.
5.- After editing the word, press the ENTER key to validate the
word and exit the option.
key to get into a menu option.
or LEFT key to move between
or DOWN key for
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QUICK CONFIGURATION GUIDE. DT-504B.
4 DT-504B CONFIGURATION
The main menu of the DT-504B module allows you to configure each
one of the elements that make-up the module. The main menu has the
following options:
- ENCODER1
- ENCODER2
- ENCODER3
- ENCODER4
- MULTIPLEXER
- MODULATOR
- SAVE
- FIRMWARE VERSION
Next, each option is explained in detail.
4.1 ENCODER
The DT-504B module has 4 encoders to digitize the signal. Each
encoder, numbered from 1 to 4, has its own configuration menu but the
options are the same for each module. Next, the menu options of an encoder
are explained:
- Service Name.
Allows you to assign a name to the Audio / Video service that is
being digitized by the encoder. It is a text field.
- Service ID.
Allows you to edit the service identifier that is being digitized. It is a
numeric field.
- Video Status.
Allows you to enable or disable the video component of the signal
that is being digitized.
- Video PID.
Allows you to edit the packet identifier of the video component in
the transport stream. It is a numeric field.
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- Audio PID.
Allows you to edit the packet identifier of the audio component in
the transport stream. It is a numeric field.
- PMT PID.
Allows you to edit the packet identifier of the PMT (Program Map
Table). The PMT describes what PIDs have the most important
details. It is a numeric field.
- Bitrate.
Allows you to know how many signal bitrate (in kilobits per second)
is being transmitted (audio+video+additional data). It is an “only
read” field.
- Audio Bitrate.
Allows you to select the bitrate (in kilobits per second) of the audio
codified signal. Available values are between 32 and 384 kbits/s.
- Audio Sensitivity.
Allows you to select the maximum level of audio input. Available
values are 0,5 Vpp and 1 Vpp.
- Audio Mode.
Allows you to select the audio output. Available options are Stereo,
Mono, Dual and Joint Stereo.
- Aspect ratio.
Allows you to change the aspect ratio of the output image. Available
options are 4:3 and 16:9.
- Video std.
Allows you to select the television broadcasting system of the input
signal. Available options are PAL or NTSC.
- Service Type.
Allows you to select the service type that is being digitized.
Available options are Digital TV or Digital Radio.
QUICK CONFIGURATION GUIDE. DT-504B
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QUICK CONFIGURATION GUIDE. DT-504B.
4.2 MULTIPLEXER
Multiplexer configuration options are:
- Network Name.
Allows you to assign a name to the network distribution. It is a text
field.
- Network ID.
Allows you to edit the identifier number of the network where the
signal is distributed. It is a numeric field.
- Orig. Net. ID.
Allows you to edit the number that identifies the original network. It
is a numeric field.
- TS ID.
Allows you to edit the number that identifies the transport stream.
It is a numeric field.
4.3 MODULATOR
Modulator configuration options are:
- Frequency.
Allows you to edit the frequency of the output signal. It is a numeric
field.
- Attenuation.
Allows you to adjust the power level of the output signal (in dB). It
is a numeric field.
- FFT Mode.
It is the transmitting mode of the signal. Select among available
values (2 K or 8 K).
- Guard Interval.
It is the security margin used to ensure that distinct transmissions
do not interfere with one another. Select among available values
(1/4, 1/8, 1/16, 1/32).
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- Constellation.
It is the constellation used to modulate and transmit the signal.
Select among available values (QPSK, 16-QAM, 64-QAM).
- Code Rate.
Select the suitable code ra
2/3, 3/4, 5/6, 7/8).
- Channel BW.
It is the bandwidth of
(7 and 8 MHz; 6 MHz option on request).
4.4 Another Options:
- Save.
Stores all changes made and validated.
QUICK CONFIGURATION GUIDE. DT-504B
te. Select among available values (1/2,
the channel. Select among available values
Press ENTER
to CONFIRM you want save changes.
WARNING!
If you do not save the changes made, you will lose them after
turning off the control module!
- Firmware Version.
Shows the firmware versio
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n of the module.
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PROMAX ELECTRONICA, S. L.
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