JF****4A
is a Modulator with an interface of a Gigabit IP (TS), a
TCP/IP (network management) interface and a RF output
interface. After data processing, the Transport Streams are
sent respectively into the QAM (AD***9) modulator, whose QAM
codes completely fulfill the technical standards of DVB, such
as interlacing, RS error-correction code, etc. The Transport
Streams are then output after AD***9 processing (some groups of
adjacent channels with an interval of 6MHz or 8MHz, which can
be composed into as many as 3**-channel outputs on the basis of
application condition.), mixing, filtering, decrement
controlling and power amplifying in QAM (AD***9)
modulator.
Main
Features:
lSupports
ITU-T J.*3A and B
lBW
range of output signals: 0.*5～8.*5MHz
(roll-off factor is 0.*5 or 0.*8～6.*5MHz(roll-off
factor is 0.*3/0.*8)
lSymbol
rate range of output data: 0.1～7Mbaud/s
or 0.1～5.*6Mbaud/s
lError-correction
codes completely fulfill DVB-C Standard
lModulating
modes: *6QAM、*2QAM、*4QAM、**8QAM、**6QAM
lBitrate
range of data: 0.1～**0Mbps
lBitrate
range of output data: 2～*6Mbps
(single channel)
lRF
range: *8～**0MHz
lMulti-way
RF mixed output: 1~3 ways with 1~8 channels in a way
lOutput
level range: *0dBuV～**0dBuV(0.5dBuV
step)
l**8
package length and display in real time the format of
data
lLarge
buffer memory, the IP interface support both outburst and
well-distributed code stream and uniform the code to improve
the code rate.
l8
PID filtering function and simple mapping function
lPCR
correction function can correct various data,
respectively and accurately
lInputs
the real time testing and displaying of the system and valid
bite rate
lElectronic
hybrid and tracking filtering to ensure excellent RF
performance
lTemperature
monitoring and automatic cooling to improve its performance and
lengthen its service life.
lError
alarming
lLCD
display
lNetwork
control interface realizes remote maintenance, supervision and
software upgrade
lPower
off memory
Main
Performance
Input
signal
TS
fulfilling DVB Standard
TCP/IP
Interface
Interface
Format: RJ*5
Protocal:
TCP/IP
Rate:
**0Mbps
Gb IP
Interface
Interface
Format: RJ*5
Protocal:
UDP
Rate:
***0Mbps
Output
Signal
RF
output
Interface
Format: BNC
Electronical
Specification: *5&branded;
Output
Frequency Range: *8MHz***0MHz
Output
Level: *****0dBuV
Reflection
Loss:≥*2dB
Carrier
Suppression: >*5dB
RF
Modulation Error Rate:≥*0dB
SNR（out-off-band）：≥*2dB
System
Control
Front
Panel Control
Adopts
Gospell’s
current liquid crystral control panel
Interface
Format: SIP5 Lead Interface
Protocal:
standard **2
Control
contents: parameters setting and information viewing
(menu)
Network
Management
Adopts
Gospell’s
current network management software
Interface
Format: RJ*5 interface, standard TCP/IP protocal
Electronic
Specification: **0Mb
Control
contents: parameters setting and information viewing
(menu)
Operation
Environment
Operation
Temperature
＋5°C～*5°C
Storage
Temperature －*5°C～**0°C
Relative
Humidity
*0～*5%
Security
fulfills
GB*******2 and GB******8 standards
Electromagnetic
Compatibility
Fulfills
GB*******2 and GB******8 standards
reliability
MTBF:≥****0
hours（atmospheric
temperature*0℃）
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