DCH-4000P-xx series Receivers
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W W W . P B I - C H I N A . C O M
10.6 Other Settings
The HDMS provides also Alarms management, Devices management, and User accounts
management. It may also be necessary to modify some of the other settings to suit the
particular installation, please see the
HDMS Reference Guide
for details.
11. FAQ
1. Why is there nothing in the LCD?
Answer:
Please check whether the power supply is connected well first. If not, insert it well
and turn on the device. If there is still nothing displayed on the LCD, then the unit may be
damaged, please contact the agent for technical support.
2. Why can the QPSK/QAM/COFDM/DVB-S2 signal not be locked?
Answer:
Please ensure whether the input cable in connected well first. If not, insert it well.
If it is connected well, please check whether all the necessary parameters are set properly.
If not, please set the parameters properly. If the signal still cannot be locked, please check
whether the quality of the signal is out of the threshold of the Tuner. If not, then the device
might be damaged, please contact the agent for support.
3. Why can the ASI not be locked?
Answer:
Please make sure the BNC cable is connected well and there are programs
transmitted to the unit via the BNC cable.
12. Appendix
12.1 Specification
QPSK Demodulation & FEC Parameters
Input Frequency Range
C & Ku Band, 950~2150 MHz
Input Level
-25 dBm ~ -65 dBm
Input Impedance
75
Ω
F type
Symbol Rate
2~45 Mb/s (SCPC or MCPC)
Rolling Off Factory
0.20 or 0.35
Punctured Rates
1/2, 2/3, 3/4, 5/6, 6/7, 7/8
Reeds Salomon Decoding
204, 188, T = 8 & I=12
DVB-C QAM Demodulation
Connector
IEC, Female (7/8 MHz) or F Female (6 MHz) Input
Input Symbol Rate Range
1~7 Mbs (PAL), 1~6 Mbps (NTSC)
Demodulation 16/32/64/128/256
QAM
Tuner Bandwidth
6 MHz or 7 MHz or 8 MHz factory optional
FEC Decoder
1/2, 2/3, 3/4, 5/6, 7/8; K=7
