Drake Digital TMQAMasi Digital QAM Modulator

TMQAMasi Digital QAM Modulator

The TMQAMasi modulator is a professional quality, modular, digital headend component designed to provide optimum performance with minimized rack space requirements. This model accepts an MPEG-2 transport stream (with or without scrambling), adds the desired Forward Error Correction (FEC), and outputs an IF signal at 44 MHz modulated by the input data stream using Quadrature Amplitude Modulation (QAM). The modulation method selected can be 16QAM, 32 QAM, 64QAM, 128QAM or 256QAM. This IF signal would normally be input to a Drake Digital upconverter to translate it to the desired operating channel frequency.

Convenient front panel buttons and display allow easy setup of operating parameters.
Forward error correction encoding supports DVB or Digicipher II® modes.
Provides automatic or fixed clock modes.
Built-In PRBS test mode.
Null packet stuffing is provided as needed in the internal fixed clock mode.
Designed to interface with Drake Digital DUC550 or DUC860 up converters.
Made in the U.S.A.

Drake Digital Components in DRMM12 rack enclosure

You may download the owners manual in Adobe® Acrobat® format by clicking here.
If you don't have the Adobe® Acrobat® Reader, click here.

Drake Digital TMQAMasi Technical Specifications

Output

Output Frequency:
44 MHz.

Output Level:
+30 dBmV.

Output Impedance:
75 Ohms.

Spurious:
-55 dBc.

MER:
38 dB minimum.

Modulation

Mode:
16, 32, 64, 128, 256 QAM.

Symbol Rate:
7.0 Msymbols/s Max.

Excess Bandwidth:
15% (ITU-A), 18% (ITU-B) programmable.

Forward Error Correction Encoding

FEC Modes:
DVB/DAVIC (ITU-T J.83 Annex A).
Digicipher® II (ITU-T J.83 Annex B).

Input

Transport Stream:
TMQAMasi: Serial Input according to DVB ASI specifications.

Connector:
TMQAMasi: BNC, 75 Ohms.

General

DC Power Required:
5 VDC
TMQAMasi: 500 ma.

Size:
2.06" W x 3.5" H x 9.25" D.
(5.23cm W x 8.9 cm H x 23.5 cm D).

Weight:
1 lb. 2 oz. (0.51 Kg.).

**Drake Digital TMQAMasi Technical Specifications**
Output
Output Frequency:	44 MHz.
Output Level:	+30 dBmV.
Output Impedance:	75 Ohms.
Spurious:	-55 dBc.
MER:	38 dB minimum.
Modulation
Mode:	16, 32, 64, 128, 256 QAM.
Symbol Rate:	7.0 Msymbols/s Max.
Excess Bandwidth:	15% (ITU-A), 18% (ITU-B) programmable.
Forward Error Correction Encoding
FEC Modes:	DVB/DAVIC (ITU-T J.83 Annex A). Digicipher® II (ITU-T J.83 Annex B).
Input
Transport Stream:	TMQAMasi: Serial Input according to DVB ASI specifications.
Connector:	TMQAMasi: BNC, 75 Ohms.
General
DC Power Required:	5 VDC TMQAMasi: 500 ma.
Size:	2.06" W x 3.5" H x 9.25" D. (5.23cm W x 8.9 cm H x 23.5 cm D).
Weight:	1 lb. 2 oz. (0.51 Kg.).

Specifications, price, and availability are subject to change without notice or obligation.

R.L. Drake, LLC
230 Industrial Drive
Franklin, OH 45005
U.S.A.

Sales: 937-746-4556
Fax: 937-806-1510
Parts and Service: 937-746-6990
In Canada: 705-742-3122

DRAKE is a registered trademark of R.L. Drake, LLC.