Toner Cable SDQPSK Digital Satellite Demodulator User Manual
Tmqam
Telephone:
Nationwide:
Fax:
E-mail:
Internet:
7/01
Dr
ak
e Digital Headend Pr
oducts
215-675-2053
800-523-5947
215-675-7543
http://www.tonercable.com
969 Horsham Road
Horsham, Pennsylvania 19044 USA
The Drake Digital system features a flexible, modular approach for the
reception and redistribution of Digital signals for CATV and Private Cable.
The units can receive and decode or transcode all the MPEG signals such
as QPSK, 8-VSB, and ATSC for retransmission in QAM or analog format.
TMQAM
QAM Modulator
The TMQAM QAM Modulator is a professional quality,
modular, digital, headend component designed to provide
optimum performance with minimized rack space requirements.
The modulator accepts a MPEG2 transport stream input in
the SPI format and is capable of providing a QAM output with
16, 32, 64, 128 or 256 constellation points.
•
Convenient front panel buttons and
display allow easy setup of
operating parameters.
•
Forward error correction encoding. DVB
or Digicipher II® modes are supported.
•
Provides Auto or Fixed clock modes.
•
Built-in PRBS test mode.
•
Null Packet Stuffing is provided as
needed in the internal fixed clock mode.
•
RF Output is +30 dBmV.
•
Designed for use with Drake DUC550
or DUC860 upconverters.
•
Fits into the popular DRMM12
rack mount.
OUTPUT
Output Frequency: 44 MHz.
Output Level: +30 dBmV.
Output Impedance: 75 Ohms.
Spurious: -55 dBc.
MODULATION
Mode: 16, 32, 64, 128, 256 QAM.
Symbol Rate: 7.0 Msymbols/s Max.
Excess Bandwidth: 15% (ITU-A), 18% (ITU-B).
FEC ENCODING
FEC Modes: DVB/DAVIC (ITU-T J.83 Annex A),
Digicipher® II (ITU-T J.83 Annex B).
INPUT
Transport Stream: Parallel Input according to DVB SPI
(Synchronous Parallel Interface).
Connector: DB25 Female.
Levels: LVDS (Low Voltage Differential Signaling).
DC Power
Required: 5 VDC @ 380 mA.
Size: 2.06'' W x 3.5'' H x 9.25'' D
(5.23 cm W x 8.9 cm H x 23.5 cm D).
Weight: 1 lb. 10 oz. (0.49 Kg).
SPECIFICATIONS