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.
Drake Digital MQM1000 Technical Specifications |
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ASI Inputs |
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Inputs: |
Two DVB Asynchronous Serial Inputs (ASI). |
QAM Modulator |
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Modulation Modes: |
16QAM, 32QAM, 64QAM, 128QAM, 256QAM,512QAM or 1024QAM. |
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 |
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Available in the fixed output clock mode. |
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Analog EAS IF Input |
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Operating Input Level: |
+30 dBmV ±5 dB @ 45.75 MHz. 75 ohms. |
Auto Switching Level: |
+20 dBmV minimum. |
Upconverter RF Output |
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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 |
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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 |
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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.
Manufacturer | Drake |
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