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MQM1000 Multiplexing QAM Modulator

MQM1000 Multiplexing QAM Modulator with built-in Agile Upconverter

The R.L. Drake model MQM1000 is a professional quality, digital headend transcoder that accepts one or two MPEG2 digital inputs via two Asynchronous Serial Input (ASI) connectors. These signals must be ATSC compatible streams if multiplexing is to be performed and usually will have originated from a local TV broadcast station and may have been transported over fiber links to the MQM1000. After multiplexing and null packet management, the MQM1000 QAM modulates and up converts onto any desired CATV or off-air output channel between 54 and 1002 MHz. The MQM1000 can also operate as a non-multiplexing QAM modulator when a single ASI input is selected.

• Front panel display and buttons allow easy setup and monitoring of operating mode and parameters.
• High output, 61 dBmV, QAM modulator and very low phase noise agile upconverter are built in.
• Output is agile on CATV or broadcast channels from 54 to 1002 MHz.
• Dual ASI Inputs.
• TS Multiplexer for MPEG2 streams.
• Program filtering of both A and B input streams. User may select or drop any of the incoming programs.
• ATSC PSIP is supported.
• MPEG program and minor channel number offsetting when multiplexing.
• Major channel number pass through or remarking is selectable when multiplexing.
• Rewriting of the MPEG tables is provided when two input streams are multiplexed.
• PCR correction is performed when necessary.
• RS232 remote control and monitoring capability with the included Drake Digital Headend Control Software (v. 2.6 or later).
• High MER output signal quality.
• 1U tall package with internal power supply conserves rack space.
• Manufactured in the USA.

Download the owners manual (PDF)

Drake Digital MQM1000 Technical Specifications
ASI Inputs
Inputs:	Two DVB Asynchronous Serial Inputs (ASI). 270 Mbps ASI clock rate with desired transport stream of 10.76 MS/s, ATSC, 19.37 Mbps.
QAM Modulator
Modulation Modes:	16QAM, 32QAM, 64QAM, 128QAM, 256QAM,512QAM or 1024QAM. Refer to manual for available combinations of QAM modes and FECs.
Symbol Rate:	1 Ms/s to 7 Ms/s.
Forward Error Correction (FEC):	ITU-A (DVB) or ITU-B (DigiCipher® II).
I/Q Phase Error:	Less than 1 degree.
Carrier Suppression:	45 dB.
Channel Amplitude Error:	Less than 1dB.
MER:	Greater than 38 dB with blind equalizer.
Null Packet Processing
	Available in the fixed output clock mode.
Analog EAS IF Input
Operating Input Level:	+30 dBmV ±5 dB @ 45.75 MHz. 75 ohms.
Auto Switching Level:	+20 dBmV minimum.
Upconverter RF Output
Output Frequency Range:	54 MHz to 1002 MHz.
Channel Plan:	Standard CATV, HRC, IRC or Broadcast.
Frequency Stability:	±5 ppm.
Maximum Output Level:	+61 dBmV minimum, adjustable downward.
Minimum Output Level:	+45 dBmV.
Output Level Accuracy:	±1 dB.
Output Impedance:	75 Ohms with return loss better than 14 dB (within output filter passband).
Spurious Outputs:	-60 dBc from 40 MHz to 1000 MHz.
Broadband Noise:	Less than -12 dBmV (6 MHz bandwidth @ ±12 MHz).
Phase Noise:	-101 dBc @ 10 kHz offset.
RS232 Control
Data Link:	2400, 4800, 9600, or 19,200 baud interface via serial cable.
RS232 Input:	DB9 connector for connection to modem, PC, or Drake SCTeci ethernet controller.
RS232 Output:	DB9 connector for connection to additional units.
General
Power:	90-132 VAC, 60 Hz, 40 W maximum
Weight:	7 lbs. (3.2 Kg.)
Size:	19" (48.3 cm) W x 1.75" (4.45 cm) H x 11.5" (29.2 cm) D
Operating Temperature:	0º C (32º F) to 50º C (122º F)

Supersedes models MQM860 and MQM861. Specifications, price, and availability are subject to change without notice or obligation.

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