PCMA860-HQ
Universal-Chassis Agile A/V Mini-Modulator
Installation and
Operation Manual
DAWNco • 3340 S. Lapeer Rd • Orion, MI 48359-1320 • Ph (248) 391-9200 • Fax (248) 391-9207 • [email protected]
Safeguards
PCMA860-HQ
Product Inspection
Inspect the equipment for shipping damage. Should any damage be discovered, immediately file a claim with the carrier.
Important Safety Instructions
To insure proper installation and operation, take a moment to read this guide before proceeding with the installation. If you have any questions or comments about the mini-modulator, please contact your dealer
The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of un-insulated “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 appliance.
WARNING:
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE
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.
ATTENCION:
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.
1 . Read Instructions: All safety and operating instructions should be read before the appliance is operated.
2. Retain Instructions: The safety and operating instructions should be retained for future reference.
3. Heed Warnings: All warnings on the appliance should be adhered to.
4. Follow Instructions: All operating and user instructions should be followed.
5. Cleaning: Unplug this appliance from the wall outlet before cleaning. Use a damp cloth for cleaning. Do not use liquid cleaners or aerosol cleansers.
6. Do Not Use Attachments: Use of attachments not recommended by the manufacturer may cause hazards.
7. Water and Moisture: Do not use this product near water—for example, near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool—and the like.
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 appliance.
9. Ventilation: This video product should never be placed near or over a radiator or heat register. This video product should not be placed in a built-in installation such as a bookcase or rack unless proper ventilation is provided or the manufacturer’s instructions have been adhered to. Any slots or opening in the cabinet are provided for ventilation. To ensure reliable operation of the video product and to protect it from overheating, these openings must not be blocked or covered. Openings should never be blocked by placing the product on a bed, sofa, rug, or other similar surface.
10. Grounding or Polarization: This video product is equipped with either a three prong plug for 110 VAC use or a two prong flat blade
220 VAC type plug. Each type is to be inserted into only the type of receptacle for which they specifically designed. Do not cut off the round grounding pin in order to be able to fit into a two prong receptacle as this could cause injury and will void the warranty.
Safeguards
PCMA860-HQ
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 appliance dealer or local power company.
12. Power-cord Protection: Power-supply cords should be routed so they are not likely to be walked on or pinched by items placed upon or against them. Pay particular attention to cords and plugs, convenience receptacles, and the point where they exit from the appliance.
13. Lightning: For added protection for this product during a lightning storm, or when it is left unattended or unused for long periods of time, the unit should be disconnected from power source.
14. 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.
15. Overloading: Do not overload wall outlets and extension cords as this can result in risk of fire or electric shock.
16. 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.
17. 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.
18. 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 instruction. Adjust only those controls that are covered by the operating instructions. An improper adjustment 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 the cabinet has been damaged.
f.
When the product exhibits a distinct change in performance— this indicates a need for service.
19. 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 parts. Unauthorized substitutes may result in fire, electric shock or other hazards.
20. 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 conditions.
21. Outdoor Antenna Grounding: Before attempting to install this product, be sure the antenna or cable system is grounded so as to provide some protection against voltage surges and built-up static charges.
a.
Use No.10 AWG (5.3mm) copper, No.8 AWG (8.4mm) aluminum, No.7 AWG (10mm) copper-clad steel or bronze wire or larger, as ground wire.
b.
Secure antenna lead-in and ground wires to house with standoff insulators spaced from 4 feet (1.22m) to 6 feet (1.83m) apart.
c.
Mount antenna discharge unit as close as possible to where lead-in enters house.
d.
A driven rod may be used as the grounding electrode where other types of electrode systems do not exist. Refer to the
National Electrical Code, ANSI/NFPA 70-1984 for information.
e.
Use jumper wire not smaller than No.6 AWG (13.3mm) copper or equivalent, when a separate antenna grounding electrode is used.
NOTE TO THE CATV SYSTEM INSTALLER
THIS REMINDER IS PROVIDED TO CALL THE CATV SYSTEM
INSTALLER’S ATTENTION TO ARTICLE 820-22 OF THE NEC
THAT PROVIDES GUIDELINES FOR PROPER GROUNDING
AND, IN PARTICULAR, SPECIFIES THAT THE CABLE
GROUND SHALL BE CONNECTED TO THE GROUNDING
SYSTEM OF THE BUILDING, AS CLOSE TO THE POINT OF
CABLE ENTRY AS PRACTICAL.
Descriptions
PCMA860-HQ
Universal-Chassis Agile A/V Mini-Modulator
135-Channel Range 54-860 MHz
(CATV 2-135)
>45dBmV min adjustable output for optimum carrier-to-noise performance
Compatible with most manufacturers mini-modulator chassis
State-of-the-art digital phaselocked-loop (PLL) design guarantees precise frequency locking for solid drift-free operation
Microprocessor control enables quick digital push-button channel selection for ease of installation, configuration, and improved system uptime
SAW (surface acoustic wave) filtered for superior adjacent channel performance enables drop-in channel expansion
BTSC stereo compatible preemphasis disable switch provides pass-through for stereo signals
In-band carrier-to-noise ratio
>65dB ensures superior picture quality
Automatic selection of aeronautical offsets (12.5kHz, 25kHz) for trouble-free configuration
Front panel access to controls enables easy setup
IRC and HRC offset available for frequency settings in systems using offset channels
A professional grade microprocessor-controlled agile audio/video mini-modulator. This modulator accepts any audio-video baseband television signal and provides a
45dBmV minimum output on CATV channels 2 to 135 (54-860 MHz) while accommodating
HRC and IRC offset frequencies. Channel selection is easily accomplished via channel up/down buttons located on the front panel while built-in RF muting circuitry prevents interference during online channel reassignment. carrier-to-noise ratio, allowing virtually unlimited numbers of Mod’s to be combined in a system without the need for external bandpass filtering. Up to 12 or 16 units can be installed
“mix-and-match” in mini-modulators or mini-demodulators. Its unique design enables it to be installed in other manufacturers’ mini-mod chassis. The unit’s tracking filter technology and double-heterodyne conversion ensure accurate and spurious-free output.
Uses SAW filtering in conjunction with FCC group delay correction circuitry to provide superior adjacent channel selectivity. The unit’s PLL circuitry in conjunction with the non-volatile memory contained in the microprocessor ensures easy and reliable channel selection and restoration. The preset.
Specifications
PCMA860-HQ
Universal-Chassis Agile A/V Mini-Modulator
VIDEO AUDIO
A/V
RATIO
RF
CA
TV
ANT
LOCK
UNLOCK
CH
RF Video
Channels:
Frequency Range:
Output Impedance:
RF Output Level:
135 Channels
54-860 MHz
(CATV Ch. 2-135)
75 Ohms
45 dBmV, adjustable from front panel (min.)
-15 dB
Adjustable -7 to -22 dB below
Output Return Loss:
Audio/Video Ratio:
Frequency Stability: video carrier
±5 kHz in aeronautical band; conforms to FCC Docket 21006
-60 dB below video carrier with Spurious Output:
C/N (In-Band):
C/N (Out-Of-Band):
A/V ratio @ 15 dB
>65 dB
>90 dB
Fv+6 MHz (Upper Adj. Rejection): >-60 dBc
Fv-1.5 MHz (Lower Adj. Rejection): >-60 dBc
I.F. Frequency: Video 45.75 MHz
Audio 41.25 MHz
Video Input Level:
Video Input Type:
Video Frequency Response:
General
1 V p-p minimum for 87.5% modulation
Clamped video negative sync
±0.8 dB, 30 Hz to 4.2 MHz
Differential Gain:
Differential Phase:
<5% (10 to 90% APL)
<5° (10 to 90% APL)
Chrominance Luminance Delay: <50 nsec, standard or FCC predistortion option
Dimensions:
Weight:
Power Input:
Operating Temperature:
1˝(W) x 8˝(D) x 3.45˝(H)
0.8 lbs.
5 VDC, 12 VDC @ .25A
-10° C to 50° C
Connectors: Video In/RF Out “F” type
Audio In RCA
Audio
Hum And Noise: -60 dB @ 87.5% modulation
Audio Baseband Input Impedance: 600 Ohms
Audio Baseband Input Level: 0.5 V p-p for 25 kHz peak deviation
Preemphasis:
Flatness Audio:
75 microsecond
1.5 dB (50 Hz to 15 kHz)
Ph:800-421-6511 www.picomacom.com
Operations and Controls
PCMA860-HQ
6
Rev. 04/03
Panels
1.
2.
3.
4.
5.
6.
7.
8.
Video Level Control:
Use this control to adjust the video modulation level (picture quality).
Audio Level Control:
Use this control to adjust the audio modulation level (volume).
Audio /Video Ratio Control:
Used to set the level of the audio carrier in relation to the video carrier.
RF Output Level Control:
Used to set output level.
CATV/ANT:
Push this button to select either CATV or TV mode.
Channel Select:
Push this button to change channel to higher number.
Channel Select:
Push this button to change channel to lower number.
Channel Lock Control:
Switch is used to prevent accidental change of channel.
9.
Channel Display:
Indicates selected channel and that power is on when lit.
10.
HRC, IRC Off-set Control:
Slide switch selects standard, HRC and IRC frequencies.
11.
Pre-emphasis on/off:
Allows preemphasis to be disabled when used with BTSC generator.
12.
Video Input:
Accepts video output from satellite receiver, VCR and CCTV camera.
13.
Audio Input:
Accepts audio output from satellite receiver and VCR.
14.
DC Power Inputs:
The three-wire power cable from the power supply connects to this jack.
15.
RF Output:
Connect this port to distribution system.
Ph:800-421-6511 www.picomacom.com
Installation Procedure
PCMA860-HQ
Use a small plastic screwdriver to make required selection of switches and buttons
1. If module is to be used in an HRC or IRC CATV frequency assignment, slide the format assignment switch inside the side of module to HRC or
IRC. (Unit is shipped with this switch in the STD position)
2.
If the audio source is BTSC stereo, slide the preemphasis switch inside the side of module to off. (Unit is shipped with this switch in the on position)
3.
Align the top and bottom edge of module with the guide channel in chassis.
4.
Slide module into chassis.
5.
Connect the 3 pin molex power supply connector.
6.
Connect a cable between the module RF output connection and the channel-combining network.
7.
Connect cables from the programming source baseband output to the audio and video input connectors of module.
8.
If needed, press the CATV/ANT button to select between cable TV and offair channel assignments.
9.
Select the desired channel by pressing either channel button adjacent to the arrows on front panel.
10.
When the desired channel is displayed, press the set button to lock channel.
11.
Connect a signal level meter or spectrum analyzer to a common port of the channel combiner network.
12.
Adjust RF output control on the front of modulator until the RF video carrier level matches the RF video level of adjacent channels.
13.
Adjust the A/V ratio control on the front panel until the RF audio carrier level is between 13 and 17dB below the RF video carrier level.
14.
Connect a television set to a common port of the channel combiner network.
15.
Analyze the brightness of channel compared to adjacent channels.
16.
If needed, adjust video control on the front of modulator until the brightness level matches the brightness of adjacent channels.
17.
Analyze the sound level of channel compared to adjacent channels.
18.
If needed, adjust audio control on the front of modulator until the sound level matches the sound of adjacent channels.
MODULE REPLACEMENT
1. Disconnect the 3 pin molex connector from module.
2. Disconnect the audio, video, and RF connectors from back of module.
3. Remove module by sliding the unit out the front of the chassis.
4. Insert replacement module into chassis.
5. Reconnect the 3 pin molex connector and audio, video, and RF connectors to the rear of module.
6. Set Channel Frequency, level and deviation controls as described in installation procedures.
OPERATION AND CARE
Do’s & Don’ts
• Always operate in a cool well-ventilated environment.
• Always provide a stable, conditioned power source..
• Heed all safety warnings and obey all environmental and electrical operating requirements.
• To clean, use a damp cloth only and clean only with mild soap.
• Do not use solvents or harsh detergents.
• Do not use this product for purposes other than intended.
HEADEND/DISTRIBUTION INTERFACE
We recommend connecting the headend components in the following manner:
Each of the modulators, signal processors or strip amplifiers output are connected to a combining network. Either a headend combiner may be used to accomplish this purpose.
The passive headend combiner consists of two rows of directional couplers combined by a hybrid splitter. Normally, the odd channels are combined on one row while even channels are combined on the other row of directional couplers for maximum isolation. The output of the combiners may be connected to the input of a launch amplifier
The output of the amplifier is connected to the main distribution line.
A 24 channel system hook-up is shown. (The same combining result may be accomplished by using a single
#____). The two #____ outputs are combined via a two-way splitter, which is connected to a launch amplifier. The input levels to the combiner, whether from a modulator, signal processor or a strip amplifier, must be at the same amplitude.
