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MQM6000L
User Manual
20 pgs1.01 Mb1

Drake MQM6000L User Manual

MQM6000L Multiplexing QAM Modulator
Instruction Manual
is a registered trademark of the R.L. Drake Holdings, LLC
© Copyright 2012 R. L. Drake Holdings, LLC P/N: 651227900A Printed in U.S.A.
Rev: 20120720 1002505
2
Table of Contents, Caution, & Important Safety Instructions
CAUTION STATEMENTS .....................................................................................................................................2
GENERAL DESCRIPTION ...................................................................................................................................5
INSTALLATION / FRONT PANEL CONTROLS .....................................................................................................6
REAR PANEL CONNECTIONS ............................................................................................................................7
OPERATION ........................................................................................................................................................10
ADDITIONAL INFORMATION .............................................................................................................................11
BROADCAST TV CHANNEL FREQUENCIES ...................................................................................................12
SERVICE / IF YOU NEED TO CALL FOR HELP .................................................................................................14
WARRANTY .........................................................................................................................................................16
Caution Statements:
WARNING: TO PREVENT FIRE OR
ELECTRICAL SHOCK, DO NOT
EXPOSE TO RAIN OR MOISTURE
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS PRODUCT TO
RAIN OR MOISTURE. DO NOT OPEN THE CABINET, REFER SERVICING TO QUALIFIED PERSONNEL ONLY.
CAUTION: TO PREVENT ELECTRIC SHOCK, DO NOT USE THIS (POLARIZED) PLUG WITH AN EXTENSION
CORD RECEPTACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE.
A product and cart combination should be moved with care. Quick stops, excessive force and uneven surfaces may cause the product and cart combination to overturn.
The lightning flash with arrow head symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product.
ATTENTION: POUR PREVENIR LES CHOCS ELECTRIQUES, NE PAS UTILISER CETTE FICHE POLARISEE
AVEC UN PROLONGATEUR, UNE PRISE DE COURANT OU UNE AUTRE SORTIE DE COURANT, SAUF SI LES LAMES PEUVENT ETRE INSEREES A FOND SANS EN LAISSER AUCUNE PARTIE A DECOUVERT.
Important Safety Instructions:
1. Read Instructions: All the safety and operating instructions should be read before the product is operated.
2. Retain Instructions: The safety and operating instructions should be retained for future reference.
3. Heed Warnings: All warnings on the product and in the operating instructions should be adhered to.
4. Follow Instructions: All operating and use instructions should be followed.
5. Cleaning: Unplug this product from the wall outlet before cleaning. Do not use liquid cleaners or aerosol cleansers. Use a damp cloth for cleaning.
6. Attachments: Do not use attachments that are not recommended by the product manufacturer as they may cause hazards.
7. Water and Moisture: Do not use this product near water—for example, near a bathtub, wash bowl, kitchen sink or laundry tub; in a wet basement;
or near a swimming pool; and the like.
3Important Safety Instructions (continued)
8. Accessories: Do not place this product on an unstable cart, stand, tripod, bracket, or table. The product may fall, causing serious injury to a child
or adult, and serious damage to the product. Use only with a cart, stand, tripod, bracket, or table recommended by the manufacturer, or sold with the product. Any mounting of the product should follow the manufacturer's instructions, and should use a mounting accessory recommended by the manufacturer.
9. A product and cart combination should be moved with care. Quick stops, excessive force, and uneven surfaces may cause the product and cart
combination to overturn.
10. Ventilation: Slots and openings in the cabinet are provided for ventilation and to ensure reliable operation of the product and to protect it from
overheating, and these openings must not be blocked or covered. The openings should never be blocked by placing the product on a bed, sofa, rug, or similar surface. This product should not be placed in a built-in installation such as bookcase or rack unless proper ventilation is provided or the manufacturer's instructions have been adhered to.
11. Power Sources: This product should be operated only from the type of power source indicated on the marking label. If you are not sure of the type
of power supplied to your home, consult your product dealer or local power company. For products intended to operate from battery power, or other sources, refer to the operating instructions.
12. Grounding or Polarization: This product may be equipped with a polarized alternating-current line plug (a plug having one blade wider than the
other). This plug will fit into the power outlet only one way. This is a safety feature. If you are unable to insert the plug fully into the outlet, try reversing the plug. If the plug should still fail to fit, contact your electrician to replace your obsolete outlet. Do not defeat the safety purpose of the polarized plug. Alternate Warnings – If this product is equipped with a three-wire grounding- type plug, a plug having a third (grounding) pin, the plug will only fit into a grounding-type power outlet. This is a safety feature. If you are unable to insert the plug into the outlet, contact your electrician to replace your obsolete outlet. Do not defeat the safety purpose of the grounding-type plug.
13. Mise à la terre ou Polarisation: Cet appareil est équipé avec un cordon d'alimentation à trois fils. Il est a brancher sur une prise ayant un connecteur
a la terre. Assurez-vous que la connection a la terre ne manque pas.
14. Power-Cord Protection: Power-supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against
them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the product.
15. Lightning: For added protection for this product during a lightning storm, or when it is left unattended and unused for long periods of time, unplug it
from the wall outlet and disconnect the antenna or cable system. This will prevent damage to the product due to lightning and power-line surges.
16. Power Lines: An outside antenna system should not be located in the vicinity of overhead power lines, other electric light or power circuits, where it
can fall into such power lines or circuits. When installing an outside antenna system, extreme care should be taken to keep from touching such power lines or circuits as contact with them may be fatal.
17. Overloading: Do not overload wall outlets, extension cords, or integral convenience receptacles as this can result in a risk of fire or electric shock.
18. Object and Liquid Entry: Never push objects of any kind into this product through openings as they may touch dangerous voltage points or short-out
parts that could result in a fire or electric shock. Never spill liquid of any kind on the product.
19. Servicing: Do not attempt to service this product yourself as opening or removing covers may expose you to dangerous voltage or other hazards.
Refer all servicing to qualified service personnel.
20. Damage Requiring Service: Unplug this product from the wall outlet and refer servicing to qualified service personnel under the following conditions:
a) When the power-supply cord or plug is damaged, b) If liquid has been spilled, or objects have fallen into the product, c) If the product has been exposed to rain or water, d) If the product does not operate normally by following the operating instructions.
Adjust only those controls that are covered by the operating instructions as an improper adjustment of other controls may result in damage and will
often require extensive work by a qualified technician to restore the product to its normal operation, e. If the product has been dropped or damaged in any way, and f. When the product exhibits a distinct change in performance—this indicates a need for service.
21. Replacement Parts: When replacement parts are required, be sure the service technician has used replacement parts specified by the manufacturer
or have the same characteristics as the original part. Unauthorized substitutes may result in fire, electric shock or other hazards.
22. Safety Check: Upon completion of any service or repairs to this product, ask the service technician to perform safety checks to determine that the
product is in proper operating condition.
23. Wall or Ceiling Mounting: The product should be mounted to a wall or ceiling only as recommended by the manufacturer.
24. Heat: The product should be situated away from heat sources such as radiators, heat registers, stoves, or other products (including amplifiers) that
produce heat.
4
Specications
ASI INPUTS
Six Inputs: 270 MHz clock rate, 40 Mbps maximum TS rate at each input.
Programs: MPTS or SPTS
Multiplexing and Program Filter: One SPTS may be selected from each input. The selected programs will be multiplexed as long
Null Packet Processing: Fixed output clock mode
QAM MODULATOR
Modulation Modes: 16QAM, 32QAM, 64QAM, 128QAM, 256QAM, 512QAM or 1024QAM. (See page 9 for all available
Symbol Rate: 1 Ms/s to 7 Ms/s.
I/Q Phase Error: Less than 1 degree.
Carrier Suppression: 45 dB.
Channel Amplitude Error: Less than 1 dB.
UPCONVERTER RF OUTPUT
Output Frequency Range: 54 MHz to 1002 MHz.
Channel Plan: Std. CATV, HRC, IRC, or Broadcast
FCC offsets: Automatic, +12.5 or +25 kHz
Frequency Stability: ± 5 ppm.
Maximum Output Level: + 40 dBmV minimum, adjustable downward.
Output Level Accuracy: ± 1 dB.
Output Impedance: 75 Ohms with return loss better than 14 dB (within output lter passband).
Spurious Outputs: -60 dBc from 40 MHz to 1000 MHz.
Broadband Noise: -75 dBc
Phase Noise: -101 dBc @ 10 kHz offset
as the data rate of the resulting MPTS does not exceed the output QAM channel capacity.
combinations of QAM modes and FEC.)
FEC: ITUA (DVB) or ITUB (DigiCipher II).
MER: Greater than 38 dB with blind equalizer.
RS232 CONTROL
Data Link: 2400, 4800, 9600, or 19,200 baud interface via serial cable.
RS232 Input: DB-9 connector for connection to modem or PC.
RS232 Output: DB-9 connector for connection to additional transcoders.
GENERAL
Power: 90 - 132 VAC/ 60 Hz, 15 W maximum.
Weight: 7 pounds
Size: 19” W x 1.75” H x 11.5” D.
Operating Temperature: 0 degrees C to + 50 degrees C
Specifications subject to change without notice or obligation.
5General Description
General Description
The R.L. Drake model MQM6000L is a professional quality, digital headend transcoder that receives up to six multiprogram transport streams via six BNC, ASI inputs. When six streams are input, the MQM6000L then multiplexes one program from each input and applies the result to the QAM modulator and up converter for output.
A program filter is provided to allow selection of the one desired program from each input. Other programs in the incoming streams are dropped.
The MQM6000L offers a +40 dBmV output upconverter with phase noise reduced to a level that is compatible with QAM modes up through 1024QAM.
The MQM6000L can be used with the Drake Digital Headend Remote Control Software, version to be announced, for setting up the program filtering, remote controlling, or remote monitoring of operating parameters. This program can also be used to download new firmware into the unit if that ever becomes desirable. The MQM6000L operates in a fixed output clock mode and processes null packets when required to maintain the set fixed clock rate. PCR correction is included.
PROGRAM FILTERING
A 'Select Program' function is provided to allow the operator to select which MPEG program present on each of the six input streams is to be included in the output multiplex.
OUTPUT
The RF output is always QAM regardless of whether the input is VSB or QAM and the built-in agile upconverter provides +40 dBmV output.
6
Installation & Mounting / Front Panel Controls
INSTALLATION AND MOUNTING NOTES
This equipment is designed to be installed in a standard 19” rack. When the unit is mounted above or below other rack mounted equipment, a 1U space should be left between the unit and the other equipment to allow ambient air flow between the units.
Connect the AC line cord to an appropriate source of 120 volt, 50/60 Hz AC power. The MQM6000L is always on once the AC power cord is connected to its power source.
Front Panel Controls
F1, LCD Display – This display presents the selected menu screen and the parameter settings. The backlight
in the display is on when power is applied. When not in adjust mode the QAM output symbol rate in Mbits per second is displayed. Pressing the down button shows the buffer status as a percentage of its maximum capacity. The left percentage represents the current buffer status and the right number represents the maximum percentage of buffer capacity that was reached since the unit was last programmed. If either of these numbers reaches 100%, it is probable that too much data is being processed which will likely result in missed frames, video or audio breakup, or other anomalies in the output signal.
Repeatedly pressing the down button will toggle back and forth between the buffer status screen and the QAM output symbol rate screen. Pressing the up button causes the display to show the firmware version number. Repeatedly pressing the up button will cause the display to toggle back and forth between the firmware version number and either the QAM output symbol rate screen or the buffer status screen, which ever one is selected with the down button.
F2, ENTER button – Use the ENTER button to enter the adjust mode or to save and load a new setting or settings after adjustment. Hold for 2 seconds until the bottom line of the display starts to flash to enter the adjust mode. After entering the adjust mode, momentarily pressing the ENTER button again will load and save any settings that may have been changed using the F5 & F6 buttons.
F3 & F4, Left and Right Buttons – Use the left and right arrow buttons to navigate from screen to screen to view a parameter setting. These buttons are operational in the view mode or the adjust mode. Using only these buttons will not change any parameter settings. After a short period of button inactivity, the default display will be returned.
F5 & F6, Up and Down Buttons – Use the up and down arrow buttons to change the value of a viewed parameter setting. The unit must be in the adjust mode with the display flashing in order for these buttons to become active for changing a parameter setting. If the unit is not in the adjust mode, pressing the up button will display the firmware version number or pressing the down button will display the output QAM symbol rate.
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