Tektronix MTD200, User Manual

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Appendix A: Interfaces
MTD200 MPEG Test Decoder User Manual
A–3
Asynchronous Serial Transport Stream Input – TS ASI
A BNC connector with the designation TS ASI corresponding to the DVB
DOCUMENT A010 (asynchronous serial interface) is provided on the front and
rear panel of the unit for connecting an MPEG2 transport stream with asynchro-
nous serial data transmission.
The asynchronous serial transport stream interface operates with a constant bit
rate of 270 Mbit/s. Data bytes (8 bit) of max. 27 Mbyte/s are transmitted via this
interface. According to a standard table, two additional bits are added to each
byte for making non-relevant data bytes (dummy bytes) required to fill up the
27-Mbyte/s data rate and also to prevent DC component in the serial signal.
The BNC connector has an input impedance of 75
W
. The input level of a
standardized signal is 800 mV (10%).
Video Outputs
A TV program can be selected from the transport stream multiplex. This
program is then decoded and available as a video signal at the BNC connectors
described below.
The BNC connector for this video output is provided at the rear of the unit and is
designated SER 75
W
. The connector has an output impedance of 75
W
, the
output level is 800 mV (10%).
A BNC connector each with the designation CCVS is provided at the front and
rear of the unit for the output of a CCVS signal. The connectors have an output
impedance of 75
W
, the output level is 1 V (
±
10%).
A BNC connector each with the designation Y and C is provided at the rear of
the unit for the output of the luminance signal (Y) and the chrominance signal
(C). The connectors have an output impedance of 75
W
, the output level is 1 V
(10%) for the Y signal and 700 mVpp (
±
10%) for the C signal.
Digital/Serial Video Output
to CCIR601 – SER 75
Analog Video Outputs for
CCVS
Analog Video Outputs for
Luminance/Chrominance
– Y/C