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CW-4881
3. GENERAL INFORMATION
Structure of the CW-4881 TS Generator
The device is equipped with two flash memories of 4
Mbyte each, which can be loaded with optional 188
bytes packets by the user.
The device can be operated in 3 modes:
1. Transport stream packet inserter
In this mode the device receives the input transport
stream and inserts the packets stored in the memory
in the place of the null packets. This mode can be
used for inserting EPG, CAT, NIT etc. tables, set-top
box upgrade software, advertisements etc. in an
existing transport stream.
2. Continuous transport stream generator
In this mode the packet inserter inserts the packets
stored in the memory in a null packet stream
generated in the device. This mode has been
designed for generating new streams e.g. measuring
signals and special control signals, but it can also be
used as a starting-point for generating any complex
TS.
3. Transport stream burst generator
In this mode the packets stored in the memory will be
put to the output as individual packets, according to
the timing assigned to them. The Transport stream
burst generator mode can advantageously be used
for generating input signals for transport stream
remultiplexers, e.g. set-top box software upgrade at
multiple channels at the same time as well as
generating data streams and measuring signals for IP
networks and IP TV systems.
The device is suitable for continuous operation.
The switchover between both flash memories is
synchronized.
Programming one of the memories does not
influence the operation of the other one.
The content of the flash memory can be read back.
TRANSPORT STREAM GENERATOR & INSERTER
&
Inserter
Technical data
ASI input and output
ASI signals
ASI input
Input voltage
Input impedance
ASI output
Output voltage
Output impedance
Transmission parameters
Data format
Packet format
Format recognition
Input data rate
Generated data rate
Raster
Accuracy
General data
Service period
Power requirements
Power consumption
Mass
Physical dimensions:
Width
Height
Depth
Operational temperature range +5 ... +40
Relative humidity
Storage temperature range -25 ... +45
Relative humidity
according to TM 1449 Rec.1
loop-through type (2 × BNC socket)
200 ... 880 mVpp
75 Ω
double type (2 identical outputs)
min. 800 mVp-p
75 Ω (BNC)
burst or continuous
188 or 204
automatic
tested between 0 and 56 Mbit/s
800 bit/s ... 80 Mbit/s
8 bit/s
1 × 10
-4
continuous
90 ~ 264 V, 47 ~ 440 Hz
max. 35 VA
approx. 3.8 kg
19" × 1 HU
483.0 mm
43.6 mm
473.0 mm
C
o
max. 80 %
C
o
max. 95 %
Budapest XI., Kondorfa u 6/B
Hungary
Tel.:+36 1 204 7815
Ltd.
Fax: +36 1 204 7839
Internet: www.cableworld.eu
E-mail: cableworld@cableworld.hu
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