VM2860 User Manual
Contents
1. VIDEO IN CAUTION nisk oF FUSE FIRE REPLACE FUSE AS 5A 250V 115 VAC 60 Hz OO MARKED AFTER SLO BLO 27 WATT gt gt DISCONNECTING a O O moeie ATTENTION A S o o RISQUE DINCENIDE REMPLACEZ FUSIBLE DU TYPE INDIQUE APR S DEBRANCHER DU SECTEUR LEAS IN SAP 5 OVERMODULATION COMBINER RF OUT TS NOTE When connecting the audio output of a stereo receiver to a VM2860 connect both Left and Right channels The VM2860 will sum these to make a complete mono audio signal When a mono source is used either input of the VM2860 may be chosen Figure 3 TYPICAL MULTIPLE MODULATOR INSTALLATION Channel Assignments 7 TABLE 1 CATV EIA CH Visual Carrier Output Channel Frequency nz Switch Setting STD EIA CH Visual Carrier Output Channel Frequency mHz Switch Setting STD IRC N A 73 25 55 25 61 25 67 25 79 25 77 25 85 25 83 25 175 25 181 25 187 25 193 25 199 25 205 25 211 25 121 2625 127 2625 133 2625 139 25 145 25 151 25 157 25 163 25 8 Channel Assignments continu TABLE 2 BROADCAST TV VHF BROADCAST CHANNELS UHF BROADCAST CHANNELS UHF BROADCAST CHANNELS Visual Carrier Frequency MHz Visual Carrier Ch IN Visual Carrier Channel Number Frequency MHz EORI Frequency MHz Channel Number2. VM2860 VM2862 Commercial Video Modulator For use in NTSC systems Instruction Manual DRAKE is a registered trademark of the R L Drake Company Copyright 2003 R L Drake Company P N 3852471C 2 2003 Printed in the U S A 2 Cautions Statements WARNING TO PREVENT FIRE OR ELECTRICAL SHOCK DO NOT EXPOSE TO RAIN OR MOISTURE iWARNING RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE POWER SUPPLY COVERS NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED PERSONNEL An appliance and cart combination should be moved with care Quick stops excessive force and uneven surfaces may cause the appliance and cart combina tion 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 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 SERVIC ING TO QUALIFIED PERSONNEL ONLY CAUTION TO PREVENT ELECTRIC SHOCK DO NOT USE THIS POLARIZED PLUG WITH AN
3. PANEL AUDIO VIDEO OUT OUT L R O lt VM2860 VM2862 Example For an output level of 45 dBmV add a 12 dB attenuator pad to the modulator output and set the VM2860 VM2862 output level to 57 dBmV ahead of the pad RACK MOUNTING Adequate ventilation is very important in multichannel installations Units should be spaced apart by at least one panel height wherever possible and some air movement is advisable in enclosed rack cabinets Excessive heat will shorten component life and modulator performance will be degraded without proper cooling FCC PART 76 612 The VM2860 VM2862 synthesizer has been programmed to comply with FCC requirements for offsets on cable channel frequencies assigned to aviation and navigation communications The programmed offset for each channel is listed in the following chart TYPICAL SATELLITE RECEIVER REAR PANEL AUDIO VIDEO OUT OUT L R O lt VIDEO A MADE IN THE U S A BY DRAKE RE OUTPUT SERIAL CAUTION nisk oF FUSE FIRE REPLACE FUSE AS 5 250 V 115 VAC 60 Hz ARKED AFTER SLO BLO 27 WATT DISCONNECTING O ATTENTION Q RISQUE D INCENIDE REMPLACEZ FUSIBLE DU TYPE INDIQU APR S DEBRANCHER DU SECTEUR VM2860 VM2862 OS MADE IN THE U S A BY DRAKE SAP LEVEL SAP AUDIO IN EI RF OUTPUT SERIAL
4. VM2862 models If the VM2860 model is used with an external stereo encoder that provides the pre emphasis VM2860 pre emphasis may be defeated by moving this jumper to OFF The VM2862 internal stereo encoder requires this setting to be ON 4 MODEL SETTING This jumper must be set to match the model number of this modulator 5 amp 6 AUDIO LOOP and VIDEO LED These jumpers must be present in the VM2860 They are not present in the VM2862 7 CLAMP JUMPER This jumper affects the time constant of the video clamp The factory setting is NORM 8 4 5 MHz TRAP The factory settings are OFF for the VM2860 and ON for the VM2862 When set to ON a 4 5 MHz notch filter is inserted in the video input path to prevent any possible 4 5 MHz energy in the video from interfering with the stereo or SAP performance A slight degradation in video response and LC delay is incurred The VM2862 thus requires an ON setting for the jumper Mono operation is less critical and the default setting for the VM2860 is OFF If audio interference from the video source is observed on the VM2860 move this jumper to the ON position See the Specifications section for details of the jumper s affect on performance 10 Service If You Need To Call For Help SERVICE INFORMATION You may contact the R L DRAKE Service Department for additional information or assistance by calling 1 937 746 6990 Monday through Friday between 8 00 A M and 4 00 P M Easte
5. 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 lf 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 12 a Mise la terre ou Polarisation Cet appareil est quip avec un cordon d alimentation a 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 13 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 14 Outdoor Antenna Grounding lf an outside antenna or cable system is connected to the product be sure the antenna or cable system is grounded so as to provide some protection against voltage surges and built up static charges Article 810 of the National Electrical Code ANSI NFPA 70 provides information with regard to proper ground
6. over a range from 12 to 25 dB below the visual carrier The aural carrier should be adjusted to approximately 15 dB below the visual carrier normal operation Clockwise rotation increases the aural carrier level and thus decreases the A V ratio F7 EAS ACTIVE Indicator This indicator lights when a signal is present at the EAS input R2 indicating that the modulator has switched to the EAS signal F8 CATV CATV 100 CHANNEL Switch This two position switch allows selection of the desired operating channel from 02 to 99 when the switch is in the CATV position and channels 100 to 135 when the switch is in the CATV 100 position See the CHANNEL ASSIGNMENTS section for a list of the corresponding operating frequency and offset if any for each channel number F9 CHANNEL Switch These pushwheel switches allow the selection of the desired operating channel from 01 to 135 See the CHANNEL ASSIGNMENTS section for a list of the corresponding operating frequency and offset if any for each channel number F10 RF OUTPUT LEVEL Control This screwdriver adjustment varies the RF OUTPUT level Clockwise rotation increases the level Rear Panel Controls and Connections 5 R3 R4 R8 R10 MADE IN THE U S A BY DRAKE RF OUTPUT SAP LEVEL SAP AUDIO IN SAP SERIAL OVERMODULATION l CAUTION risk oF FUSE FIREREPLACEFUSEAS SA 20V 115 VAG 60 Hz OO O SLO BLO 27 WATT
7. remedy and no claim for incidental or consequential damages losses or expenses Some states do not allow limitations on how long an implied warranty lasts or do not allow the exclusions or limitation of incidental or consequential damages so the above limitation and exclusion may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from state to state This warranty shall be construed under the laws of Ohio For Service contact R L DRAKE COMPANY 230 Industrial Drive Franklin Ohio 45005 U S A Customer Service and Parts Telephone 1 937 746 6990 Telefax 1 937 743 4576 World Wide Web Site http www rldrake com R L Drake Company 230 Industrial Drive Franklin Ohio 45005 U S A Customer Service and Parts Telephone 1 937 746 6990 Telefax 1 937 743 4576 World Wide Web Site http www rldrake com
8. EXTENSION CORD RECEPTACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE 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 manufac turer 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 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 wit
9. Internal Jumper Settings 9 REAR PANEL OFF ON 8 4 5 MHz TRAP ga VM2862 VM2860 4 MODEL SETTING 7 CLAMP NORM SLOW Ea 0 o I O CR 3 AUDIO PRE EMPHASIS o y ON OFF tre Hy Cull la 1 CHANNEL PLAN HR BCTV NO JUMPER STD FRONT PANEL Figure 4 INTERNAL JUMPER SETTINGS There are a number of internal jumpers that may be programmed to change certain parameters from the factory default settings Some of these jumpers should not be changed in the field In most cases the factory default settings should prevail 1 CHANNEL PLAN JUMPER The factory setting for this configuration is to have no jumper This provides a standard EIA CATV plan If IRC frequencies are required add a shorting jumper across the two pins pointed out by the IRC arrow in Figure 4 For HRC use the two pins indicated for HRC If broadcast frequency assignments are needed jumper the two pins indicated by the BCTV arrow NOTE Never install more than one shorting jumper at a time at this block of headers 2 IF LOOP JUMPER The factory setting is shown in Figure 4 If this jumper is removed the 44 MHz IF loop will be opened and the modulator output will go away This is used for special applications and will not normally be changed 3 AUDIO PRE EMPHASIS JUMPER This jumper should normally be in the ON position to enable the 75 Sec audio pre emphasis ON is the correct setting for both the VM2860 and
10. MARKED AFTER DISCONNECTING D rene ATTENTION Y J 00 FEMPLACEZ FUSIBLE DU DEBRANCHER DU SECTEUR D N a TYPE INDIQU APR S R9 a Figure 2 REAR PANEL R1 RF OUTPUT This is the modulator output 54 to 864 MHz R2 EAS IN Connector Apply a 44 MHz 45 75 MHz video carrier signal at 30 dBmV to this input from an EAS IF modulator Any level above 20 dBmV will activate the auto switching circuitry R3 SAP Level Adjusts the modulation level of the SAP subcarrier Advance level until indicator R5 just illuminates R4 SAP AUDIO IN Apply the audio program for the SAP audio channel to this input R5 SAP OVERMODULATION Indicates overmodulation of the SAP audio channel Adjust audio with SAP level control R3 R6 AUDIO IN L R These are unbalanced audio inputs to the IF circuits These RCA phono connector inputs accept baseband through 15 kHz audio at a nominal level of 250 mV RMS approximately 10 dBu SAP option must be installed in the VM2862 The SAP option may be field installed by a qualified technician into a VM2862 For purchase information call Drake Customer Service at 1 937 746 6990 R7 VIDEO INPUT RCA type or F type These are used as the baseband input to the IF circuits Use ONE of these inputs either the RCA or F type which accepts baseband through 4 2 MHz video at levels from 0 7 Vp p to 1 5 Vp p R8 Fan Vents To ensure p
11. e to the stereo or SAP channels The RF section of the modulator contains bandpass filtering that divides the 54 to 862 MHz output range into four bands each approximately 200 MHz wide This filtering in conjunction with the use of high level low noise floor mixing ensures very low broadband noise at the output Thus a full complement of up to all 134 available channels from VM2860 or VM2862 modulators may be combined while maintaining an excellent C N of each channel All of the mentioned features combined with a carefully designed low noise and low distortion output stage provide reliable operation in a densely crowded SMATV or CATV environment internal jumper A high quality IF SAW filter with FCC predistortion eliminates adjacent channel interference and provides optimum delay characteristics SPECIFICATIONS RF Frequency Range FCC Offsets Output Level Amplitude Stability Output Impedance A V Ratio Frequency Stability Spurious Outputs Phase Noise Output Filter Bands Broadband Noise VIDEO Input Level Input Impedance Frequency Response In channel C N L C Delay Differential Gain Differential Phase MONO AUDIO Input Level Input Impedance VM2860 VM2862 54 MHz to 864 MHz Standard CATV channels 2 to 135 Broadcast HRC and IRC channel plans available by internal jumper Automatic positive 60 dBmV minimum 12 dB minimum adjustment range 1 dB 75 Oh
12. e unit must be sent to the following address Service Department R L DRAKE COMPANY 230 Industrial Drive Franklin Ohio 45005 U S A Be sure to include your street address which will be needed for UPS return UPS Surface Brown Label takes 7 10 days to reach us depending on your location Blue takes 2 3 days Should you want to return your unit for service package the unit carefully using the original carton or other suitable container Write your return address clearly on the shipping carton and on an enclosed cover letter describing the service required symptoms or problems Also include your daytime tele phone number and a copy of your proof of purchase The unit will be serviced under the terms of the R L DRAKE COMPANY Limited Warranty and returned to you Red is an overnight service Send the unit in a way that it can be traced if we can t verify receipt of shipment We suggest UPS or insured postal shipment If the unit is still under the original owner s warranty R L DRAKE will pay the cost of the return shipment to you Our return shipping policy is that we will return it UPS Brown if received Brown or by US Mail it will be returned Blue if received Blue or Red or it will be returned however you prefer if you furnish the return cost for the method you select If the unit is out of warranty use one of the following methods for return shipment 1 You designate billing to American ExPress VISA MasterCard
13. h 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
14. ing amplifiers that produce heat NOTE TO CATV SYSTEM INSTALLERS THIS REMINDER IS PROVIDED TO CALL THE CATV SYSTEM INSTALLER S ATTENTION TO ARTICLE 820 40 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 EXAMPLE OF ANTENNA GROUNDING pose ANTENNA LEAD IN WIRE GROUND CLAMP ANTENNA DISCHARGE UNIT NEC SECTION 810 20 ELECTRIC SERVICE EQUIPMENT GROUNDING CONDUCTORS NEC SECTION 810 21 GROUND CLAMPS l POWER SERVICE GROUNDING ELECTRODE SYSTEM NEC ART 250 PART H Table of Contents Description Specifications 3 TABLE OF CONTENTS Caution Statements Important Safety Instructions Table of Contents Description Specifications Front Panel Controls and Indicators Rear Panel Controls and Connections a kh ND Db 6 Installation Installation Diagram 7 Channel Assignments 9 Internal Jumper Settings 10 Service If You Need To Call For Help 11 Warranty O DRAKE VM2860 VIDEO MODULATOR O owen vont overnoo non QZ oversvoo sen Oh m Co Co Co Co Co Co CD DESCRIPTION An auto switching alternate IF input labeled EAS input is provided The R L Drake VM2860 and VM2862 Video Modulator
15. ing of the mast and supporting structure grounding of the lead in wire to an antenna discharge unit size of grounding conductors location of antenna discharge unit connection to grounding electrodes and requirements for the grounding electrode See Figure A 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 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 ser
16. ith LED modulation indicators 10K Ohms unbalanced 30 db 50 Hz to 12 5 kHz 25 dB 12 5 kHz to 14 kHz 0 5 dB 50 Hz to 14 kHz 0 5 maximum 65 dB VM2862 only 250 mVrms to 2 5 Vrms manual gain adjustment with over modulation indicator 10K Ohm unbalanced 2 dB 50 Hz to 10 kHz 1 maximum S N 80 dB EAS INPUT Level Impedance Isolation Auto Switching Level 30 dBmV 1 dB visual carrier 75 Ohm 20 dB return loss 60 dB 20 dBmV GENERAL AC Power Fuse Temperature Range Cooling Radiated Emissions Size Weight 115 VAC 10 60 Hz 23 Watts VM2860 28 Watts VM2862 1 2 Amp Slo Blo 5 X 20 mm 0 to 50 C Internal 1 85 CFM fan allows operation in the rack without air spaces between units FCC Part 15 11 25 D x 1 75 H x 19 W 8 lbs 8 oz 4 Front Panel Controls and Indicators F1 F2 F4 F6 F7 F8 F9 F10 O DRAKE VM2860 VIDEO MODULATOR O vje E LUI EC A TM TE CA Lefer cary pavan als sal Lien wire O e an ae E a V V Figure 1 FRONT PANEL F1 POWER Indicator This LED lights when the unit is connected to a source of AC power The LED flashes when on an invalid channel or if there is a synthesizer error F2 VIDEO LEVEL Control The setting of this screwdriver adjustment determines the vide
17. ms 12 dB return loss within output filter passband 12 dB to 25 dB 5 ppm All oscillators locked to the same internal reference 60 dBc at 60 dBmV output level 5 MHz to 1000 MHz 15 dB A V ratio 85 dBc at 10 kHz offset 54 MHz to 258 MHz 258 MHz to 462 MHz 462 MHz to 660 MHz 660 MHz to 864 MHz 80 dBc 4 MHz bandwidth 60 dBmV output level 18 MHz offset within output filter passband 90 dBc outside of output filter passband output filtered into 4 approximately 200 MHz wide bands 1 Vp p 3 dB manual gain adjustment with modulation indicators 75 Ohms 25 dB return loss 20 Hz to 4 2 MHz 1 dB with 4 5 MHz trap off 20 Hz to 4 1 MHz 1 dB with 4 5 MHz trap on 65 dB 50 nS of FCC predistortion with 4 5 MHz trap off 20 80 nS of FCC predistortion with 4 5 MHz trap on 3 9 250 mVrms to 2 5 Vrms manual gain adjustment with LED modulation indicators 10K Ohms unbalanced The inclusion of a fan in the VM2860 and VM2862 permits rack mounting of this equipment without leaving the typical 1U air space between modulators MONO AUDIO cont d Pre emphasis Frequency Response THD S N 75 uS 50 Hz to 15 kHz 1 dB 0 5 maximum 65 dB BTSC STEREO AUDIO VM2862 only Input Level Input Impedance Separation Frequency Response THD S N SAP AUDIO Option Input Level Input Impedance Frequency Response THD 250 mVrms to 2 5 Vrms manual gain adjustment w
18. o modulation level Clockwise rotation increases the depth of modulation After installing the unit and with a nominal 1 Vp p video source connected adjust the VIDEO LEVEL control to a point where the red LED modulation indicator see item F3 just remains off 87 5 depth of modulation Itis normal for the green modulation indicator to be on with only sync level video input F3 MODULATION Indicators Video The green LED will be turned on continuously with sync level or higher video input An overmodulation condition is noted with the red LED turned on continuously The VIDEO LEVEL control should be set to a point where the red LED just remains off see item F2 F4 AUDIO LEVEL Control The setting of this screwdriver adjustment determines the audio deviation level Clockwise rotation increases the level After installing the unit and with the audio source connected adjust the AUDIO LEVEL control to a point where the green LED is turned on continuously and the red LED just remains off 25 kHz peak deviation F5 MODULATION Indicators Audio The green LED will be turned on continuously for peak deviations of approximately 2 5 kHz 10 of 25 kHz maximum or greater An overmodulation condition is noted with the red LED turned on continuously The AUDIO LEVEL control should be set to a point where the red LED just remains off see item F4 F6 A V RATIO Control This screwdriver adjustment varies the level of the aural carrier
19. or Discover card 2 You prepay the service charges with a personal check or 3 You specify some other method of return and payment When calling the technician can estimate the repair charges for you over the phone This is another good reason to call before sending a unit in for repair Typically equipment is repaired in five to ten working days after it arrives at R L DRAKE if we have all the facts If we must call you it may take longer R L DRAKE is not responsible for damage caused by lightning nonprofes sional alterations acts of God shipping damage poor storage handling etc R L DRAKE will make note of any shipping damage upon receipt You will need to send proof of purchase to receive warranty service Typically a copy of the invoice from an R L DRAKE dealer will suffice The warranty is for the original owner only and is not transferable Warranty 11 Three Year Limited Warranty R L DRAKE COMPANY warrants to the original purchaser this product shall be free from defects in material or workmanship for three 3 years from the date of original purchase During the warranty period the R L DRAKE COMPANY or an authorized Drake service facility will provide free of charge both parts and labor necessary to correct defects in material and workmanship At its option R L DRAKE COMPANY may replace a defective unit To obtain such a warranty service the original purchaser must 1 Retain invoice or original
20. proof of purchase to establish the start of the warranty period 2 Notify the R L DRAKE COMPANY or the nearest authorized service facility as soon as possible after discovery of a possible defect of a the model and serial number b the identity of the seller and the approximate date of purchase and c A detailed description of the problem including details on the electrical connection to associated equipment and the list of such equipment 3 Deliver the product to the R L DRAKE COMPANY or the nearest authorized service facility or ship the same in its original container or equivalent fully insured and shipping charges prepaid Correct maintenance repair and use are important to obtain proper performance from this product Therefore carefully read the Instruction Manual This warranty does not apply to any defect that R L DRAKE COMPANY determines is due to 1 Improper maintenance or repair including the installation of parts or accessories that do not conform to the quality and specifications of the original parts 2 Misuse abuse neglect or improper installation 3 Accidental or intentional damage Allimplied warranties if any including warranties of merchantability and fitness for a particular purpose terminate three 3 years from the date of the original purchase The foregoing constitutes R L DRAKE COMPANY S entire obligation with respect to this product and the original purchaser shall have no other
21. rn Time except on holidays You may also contact the R L DRAKE Service Department by E mail at the following address TechSupport rldrake com or by Telefax 1 937 743 4576 IF YOU NEED TO CALL FOR HELP Call our Customer Service Technical Support line at 1 937 746 6990 between 8 00 A M and 4 00 P M Eastern Time weekdays Please have the unit s serial number available We will also need to know the specifics of any other equipment connected to the unit When calling please have the unit up and running near the phone if possible Our technician s will likely ask certain questions to aid in diagnosis of the problem Also have a voltmeter handy if possible R L DRAKE also provides technical assistance by e mail TechSupport rldrake com or by Telefax 1 937 743 4576 Many of the products that are sent to us for repair are in perfect working order when we receive them For these units there is a standard checkout fee that you will be charged Please perform whatever steps are applicable from the installation sections of the Owner s Manual before calling or writing this could save unnecessary phone charges Please do not return the unit without contacting R L DRAKE first it is preferred to help troubleshoot the problem over the phone or by mail first saving you both time and money Inside the carton enclose a note with your name address daytime phone number and a description of the unit s problem Th
22. roper cooling of the unit do not block these vents for the cooling fan R9 FUSE Always replace this fuse with one of the same type and rating 5 Amp 250 V SLO BLO 5 x 20 mm type R10 LINE CORD This is a three wire power cable When the cable is connected to a properly wired AC power line outlet this cable grounds the instrument cabinet Connect to a nominal 115 VAC 10 60 Hz source Do not defeat the safety purpose of the center ground prong on the attached line cord plug 6 Installation Installation Diagram CONNECTIONS AND CONTROLS All connections to and from the VM2860 VM2862 are made through the rear panel Figure 3 shows a typical two channel installation using a typical satellite receiver as a signal source Additional channels can be added by using additional VM2860 VM2862 modulators and either multi port combiners or combinations of two port combiners INSTALLATION NOTES Level adjustment provides optimum performance in multichannel installations The modulator outputs should be checked periodically with a spectrum analyzer to maintain a 1 dB variation of adjacent channel carriers Aural Visual A V ratios should be held to 15 dB or less The Output Level and A V Ratio controls are used respectively to make these adjustments If an output level of less than 50 dBmV is required from the VM2860 VM2862 add an attenuator of the appropriate value to the modulator output TYPICAL SATELLITE RECEIVER REAR
23. s are high quality vestigial sideband units with synthesized visual and aural carriers They are designed to accept NTSC video and audio baseband signals from a satellite receiver or similar equipment Front panel video and audio level controls with accompanying modulation indicators permit easy setup of the proper modulation levels The A V ratio and RF output level controls are also provided on the front panel A rear panel EAS alternate IF input is also provided The VM2860 model is for applications with mono audio and the VM2862 model provides BTSC stereo encoded audio If SAP is required this option is available for the VM2862 model and is field installable Synthesized operation provides complete frequency agility allowing front panel selection of any standard CATV channel from 2 to 135 54 to 862 MHz band FCC required offsets for aeronautical channels are automatically provided for each channel that requires an offset For special applications IRC or HRC CATV frequencies or off air broadcast frequencies can be selected after moving an for connection of an Emergency Alert System 44 MHz IF signal When the EAS IF signal appears at the EAS input the main video and audio modulated IF is replaced by the EAS input signal A 4 5 MHz video trap may be selected via an internal jumper VM2862 has 4 5 MHz trap on as factory setting This may be used to filter off a 4 5 MHz sound subcarrier or undesired video components to prevent interferenc
24. vicing 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 includ
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