User`s manual

100-M0056X2B 23 of 28
www.cobham.com/gms
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