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SCT4860 8PSK
User Manual
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Drake SCT4860 8PSK, Sat-1024QAM User Manual

SCT4860 Transcoder System
Instruction Manual
is a registered trademark of the R.L. Drake Holdings, LLC
© Copyright 2012 R. L. Drake Holdings, LLC P/N: 651228900A Printed in China
Rev: 20121008 1002388
2
Table of Contents, Caution, & Important Safety Instructions
CAUTION STATEMENTS .....................................................................................................................................2
GENERAL DESCRIPTION ...................................................................................................................................5
INSTALLATION AND MOUNTING .........................................................................................................................6
LNB INPUT / SETUP AND PROGRAMMING .......................................................................................................9
ADDITIONAL FEATURES ....................................................................................................................................12
CATV CHANNEL FREQUENCIES ......................................................................................................................15
BROADCAST TV CHANNEL FREQUENCIES ...................................................................................................16
SERVICE / IF YOU NEED TO CALL FOR HELP .................................................................................................17
WARRANTY .........................................................................................................................................................19
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
SATELLITE INPUT
I/Q Amplitude Imbalance: <1dB
QAM OUTPUT
Level Adjustment Increment: 1 dB, nominal
Channel Amplitude Error: <1 dB
Frequency Range: 950 MHz to 2150 MHz
Tuning Increment: 500 kHz
Acquisition Range: ±5.0 MHz minimum
Input Level: -25 dBm to -70 dBm
Input Impedance: 75 Ohms, return loss of 10 dB minimum
I/Q Phase Imbalance: <1 Degree
Mode: QPSK, 8PSK
FEC: DCII, DVB, advanced Turbo modes
VITERBI Autoscan: 1/2, 2/3, 3/4, 5/6, 6/7, 7/8 - DVB
5/11, 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 7/8 - DCII
Turbo QPSK modes: 1/2, 3/4, 2/3, 5/6, 7/8
Turbo 8PSK modes: 2/3, 5/6, 8/9, 3/4, 4/5
Input Data Rate: 2 Mbaud to 30 Mbaud.
Output Impedance: 75 Ohms, return loss of 10 dB minimum
Output Level: + 25 to +40 dBmV, displayed
Display Error: ± 2 dB maximum
Frequency Range: 54 MHz to 864 MHz
Frequency Plan: Standard, IRC, or HRC CATV channels or off-air broadcast channels.
Broadband Spurious: -60 dB, 5 MHz to 900 MHz
Broadband Noise: -75 dBc, 6 MHz bandwidth
Phase Noise: -103 dBc/Hz @ 10 kHz offset
Frequency Stability: ± 5 kHz
QAM I/Q Phase Error: <1 degree
Carrier Suppression: 45 dB
MER: >40 dB, with blind equalizer.
Mode: 16, 32, 64, 128, 256, 512, 1024 QAM
Symbol Rate: 1 Mbaud to 7 Mbaud
FEC: ITU-T J.83 Annex A or Annex B
RS232 CONTROL
Data Link: 4800 baud interface to PS151 via power supply cable.
RS232 Input: DB-9 connector on PS151 for connection to modem or PC.
RS232 Output: DB-9 connector on PS151 for connection to additional transcoders.
GENERAL
Operating Temperature Range: 0o C to +50o C, ambient.
Size: 1.1" W x 3.4" H x 13.25" D.
Weight: 1 lb. 6 oz.
Power Requirement: All voltages are provided by the Drake model PS151 power supply. PS151 power requirement: 90
to 260 VAC / 150 W, maximum w. 10 transcoders powered.
TRANSPORT STREAM GROOMING
Auto clock mode: None
Fixed clock mode: Null packets are dropped or added as necessary to provide user selected fixed output baud rate.
PCR Restamping: When required.
Specifications subject to change without notice or obligation.
5General Description
General Description
The R.L. Drake model SCT4860 is a professional quality, modular, digital headend component providing QPSK or 8PSK input to QAM transmodulation and RF upconversion functions in a single module. Up to ten SCT4860 modules and a power supply module can be accommodated in the RMT150 rack mounting tray, occupying only a 2 unit (3.5”) high rack space. The SCT4860 can transcode DigiCipher II or DVB digital satellite signals, included those with advanced turbo satellite FEC modes, outputting QAM modulation.
The SCT4860 accepts L band RF inputs between 950 and 2150 MHz from the LNB at the satellite dish. The transcoder demodulates the selected satellite QPSK or 8PSK signal. The forward error correction (FEC) imbedded in the data stream is used to help retrieve an error free digital transport stream containing the desired digital programming multiplex.
If a fixed output clock rate has been reached the null packets in the transport stream are processed to provide the selected rate. When required, PCRs are recalculated.
The transcoder then applies cable environment FEC to this stream and remodulates using QAM modulation that occupies a nominal 6 MHz wide cable channel slot. QAM modes up through 1024 QAM are supported.
The RF upconverter then upconverts the IF QAM signal to the selected output channel - any standard EIA, IRC, or HRC CATV channel or a broadcast off-air channel frequency in the range of 54 to 860 MHz.
Bandpass flatness and phase noise are very closely controlled in the SCT4860 to insure a high MER and S/N ratio of the output signal. This insures that the transcoder will not introduce a source of errors into the distribution process. Because the MPEG2 transport stream information is not modified by the transcoder, all encryption, authorization, and program guide information is passed on to the CATV set top box, unchanged.
6
Installation and Mounting
Installation and Mounting
Install the SCT4860 transcoders in the RMT150 rack mounting frame. Slide each module into the tray so that the "F" connector extends though the front panel hole, the LED is properly aligned behind its front panel hole, and the hook shaped projection on the bottom of the module engages the rear of the mounting tray. Secure the module with the supplied standard 1/2 inch "F" connector mounting nut and nylon washer.
Similarly, mount the PS151 power supply in the RMT150 tray, making sure that the LCD display and control buttons line up with their corresponding holes in the front panel, and that the hook shaped projections on the rear of the unit engage the rear of the mounting tray. Secure the unit in place, with the supplied Philips head black screws, from the front panel. Connect each SCT4860 to the PS151 with the cable included with the SCT4860. Each SCT4860 can connect to any one of the ten sockets on the power supply. However, to minimize confusion, it is suggested that the left most unit (as viewed from the front panel) be connected to power supply socket number 1, the second from the left to number 2, etc.
Connect the LNB signal from the LNB splitter to each SCT4860 module at the front panel connector. Connect each SCT4860 RF output "F" connector on the rear of the unit to the output combiner. The Drake model LBS2250 is a combination LNB L band multiswitch/amplified splitter in addition to a CATV output combiner. It provides these functions in only 1 RU of rack space. Also, plug the cable from the front panel fan module into the FAN POWER receptacle on the rear of the power supply. Plug the line cord from the PS151 into the AC power source. SCT4860s can be mixed with SCT1860s, SCT2860s, or SCT3860s and one PS151.
When installing the RMT150 tray of transcoders, it is not necessary to leave a vertical airspace between the transcoder tray and other equipment unless that other equipment specifies that a space should be left open. The air flow through the transcoders and power supply has been designed to allow immediate adjacent mounting of multiple RMT150 trays with SCT4860 transcoders and PS151 power supplies installed. Of course, air spaces may be left in between RMT150s if desired.
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