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 -
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.
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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