Atec Tektronix-DDS200 - Manual (Page 2)

Appendix A: Specifications
A–2 DDS200 Digital Demodulation System User Manual
Table A–1: Electrical Specifications (cont.)
Characteristics Supplemental information Requirements
Insertion loss (64 QAM)
x 1.5 dB
Symbol rate, typical 1.5 to 7.0 MBaud When setting the symbol rate value, the accuracy should be to three
decimal places
n Symbol rate 6.9 MBaud
Equalizer Self adapting, selectable with freeze mode
Reed-Solomon decoder 204, 188 byte t=8, selectable
Bit error rate display range 10 -3 to 10 -10
Interleaving Forney, L=12
Energy dispersal IESS 309 to DVB specification
Internal Noise Generator (Option
B5)
Signal/Noise ratio, typical 12 to 62 dB
Resolution 0.1 dB
Filter selection Automatic conversion and correct setting of S/N ratio based on
selected filter.
Outputs
Parallel MPEG2 transport
stream Connector: rear-panel 25-pin
Standard LVDS (188 or 204 bytes), DVB-A010
Source impedance, typical 100
W
DC component, typical 1.25 V
Signal amplitude, typical 247 mV to 454 mV
Transmission link length
(Max) Approximately 5 meters
Serial MPEG2 transport stream Connector: rear-panel female type BNC
Standard ASI
Source impedance, typical 75 W
DC component, typical 0 V
Signal amplitude, typical 0.9 V
p-p
Transmission rate, typical 270 Mbit/s Fixed
QAM serial data
(before Reed-Solomon) Connector: rear-panel female type BNC
Source impedance, typical 75
W
QAM serial clock output Connector: rear-panel female type BNC
Source impedance,
typical 75
W