1. Manuals
  2. Brands
  3. Standard Communications Manuals
  4. Modulator
  5. TVM Series
  6. Owner's manual

Standard Communications TVM Series Owner's Manual

Frequency-agile
Hide thumbs
Table of Contents

Advertisement

Quick Links

Advertisement

Table of Contents
loading

Summary of Contents for Standard Communications TVM Series

  • Page 2 Changes that occur after the date of printing will be incorporated in supplemental bulletins or later editions of this manual. This document is the property of Standard Communications Corp., and em- bodies proprietary subject matter of Standard Communications Corp. All de- sign, manufacture, reproduction, use and sale rights regarding the same are expressly reserved.

  • Page 3: Safety Considerations

    SAFETY CONSIDERATIONS AVIS – RISQUE DE CHOC ELECTRIQUE – NE OAS OUVRIR For user safety, one or more of the caution labels shown here may have been affixed to the side or rear panels of this equipment. The significance of the two symbols enclosed by triangles is described below: This symbol means that dangerous voltage levels are present within the equipment.
  • Page 4 IMPORTANT SAFEGUARDS Standard Communications Corp. (SCC) strongly advises the user to read and understand the following safety instructions prior to installing and operating this equipment. 1. Read These Instructions First − All safety and operating instructions should be read before installing or operating this equipment.
  • Page 5 13. NOTE TO CATV SYSTEM INSTALLERS: This reminder is provided to call your attention to NEC Articles 810-21, 820-22, and 820-40 that provide guidelines for proper grounding. In particular, these articles specify that the cable ground shall be connected to the building grounding system, as close to the point of cable entry as practical (see Figure 1).

  • Page 6: Table Of Contents

    CONTENTS SAFETY CONSIDERATIONS ................IMPORTANT SAFEGUARDS ................GENERAL INFORMATION ................DESCRIPTION OF THE TVM450/TVM550............1-1 DESCRIPTION OF THE TVM550II/TVM550IIS ............1-1 FEATURES.........................1-2 SPECIFICATIONS ....................CONTROLS AND CONNECTIONS ..............INSTALLATION AND OPERATION ............... INSTALLATION......................4-1 INTERCONNECTION ....................4-1 OPERATION ....................... TVM450/TVM550/TVM550II..................4-3 TVM450S AND TVM550S ..................TVM550IIS ......................4-10 DSG2000 OPERATION..................4-11 TEST TONE ......................4-12...
  • Page 7 Contents FIGURES Typical Antenna System Grounding ...............iv 3-1. Controls and Connections ................3-2 3-2. TVM Top Inside View..................3-5 3-3. DSG2000 Front and Rear Panels ..............3-6 4-1. Typical Satellite Headend Installation..............4-2 4-2. CMA60 Front and Rear Panels ..............4-5 4-3. Alignment Without VITS Present..............4-6 4-4.

  • Page 8: General Information

    General Information GENERAL INFORMATION DESCRIPTION OF THE TVM450/S TVM550/S The TVM450, TVM450S, TVM550, and TVM550S are rebroadcast-quality, phase- locked loop (PLL)-synthesized, frequency-agile, community antenna television (CATV) and cable system television-distribution modulators. The TVM450 models range from 54 to 450 MHz, and the TVM550 models range from 54 to 550 MHz for use in domestic systems.

  • Page 9: Features

    General Information FEATURES • Quick and easy installation • Compatible with all external BTSC and RF scrambling systems • Factory-calibrated front panel controls with center detents • Rebroadcast-quality noise-free and spurious-emission-free RF output performance, with rock-solid PLL-synthesized surface acoustical wave (SAW)-filtered 54 to 550 MHz, frequency-agile channel output, with direct front panel readout •...

  • Page 10: Specifications

    Specifications SPECIFICATIONS TVM450/S/TVM550/S/TVM550II/TVM550IIS SPECIFICATIONS GENERAL Primary Power 115 VAC Line Frequency 50 to 60 Hz Power Consumption  40 W (With Option) TVM450  50 W (With Option) TVM550/TVM550II/TVM550IIS –14 to +122 F (–10 to +50 C) Operating Temperature Range Operating Humidity Range (Noncondensing) 0 to 90% Operating Altitude Range...
  • Page 11 Specifications TVM450/S/TVM550/S/TVM550II/TVM550IIS SPECIFICATIONS (Continued) RF CHARACTERISTICS TVM450/TVM450S TVM550/TVM550S/TVM550II/TVM550IIS ∫ ∫ TVM450/TVM450S ∫ ∫ TVM550/TVM550S/TVM550II/TVM550IIS ± ∫ ∫ ± – – – – ± ± – – – – TVM450/TVM450S – – TVM550/TVM550S/TVM550II/TVM550IIS – – – – – – – – ...
  • Page 12 Specifications CSG60 STEREO SPECIFICATIONS AUDIO INPUT – – Left Right –10 ± 2 to + 10 ± 2 dBm Mono Left ± ± Right ± ± Mono Left Right Mono Left ± ± Right VIDEO INPUT AND OUTPUT ∫ ∫ ∫...
  • Page 13 Specifications CSG60 STEREO SPECIFICATIONS (Continued) BASEBAND OUTPUT ± ± Output Level (Main Channel) ± ± Output Impedance (Unbalanced) ± ± 50 Hz to 10 kHz 10 Hz to 13 kHz – – ∫ ∫ 50 Hz to 100 Hz ∫ ∫...
  • Page 14 Specifications DSG2000 SPECIFICATIONS GENERAL º º – – º º CONNECTORS AUDIO INPUTS (L, R, SAP, AUX – Processed on the Audio PC Board) τ τ τ τ > > τ τ – – VIDEO INPUTS (Processed on the Stereo PC Board) Ω...
  • Page 15 Specifications DSG2000 (Continued) 4.5 MHz AURAL CARRIER OUTPUT (Generated on the FM PC Board) τ τ τ τ τ τ τ τ STEREO ENCODER – – – – – – – – – – TEST TONE MODE HEADPHONE OUTPUT τ τ...
  • Page 16 Specifications DSG2000 OPTIONS AGC2000 (Automatic Gain Control) SAP2000 ENCODER (Processed on the SAP PC Board) – – – – – – – – TVM450/S/TVM550/S/TVM550II/TVM550IIS Owner’s Manual Page 2-7...

  • Page 17: Controls And Connections

    Controls and Connections CONTROLS AND CONNECTIONS Control/Connector Locations The TVM-series have convenient control locations provide ease of operation. Front Panel for Models with CMA60 Audio Module Refer to Figure 3-1 for the following description: POWER – Red LED (TVM450) or Green LED (TVM550 models). Indicates that the unit is plugged into the AC power and is operational.

  • Page 18: Controls And Connections

    Controls and Connections 9031 Figure 3-1. Controls and Connections 11. AUDIO DEVIATION – Potentiometer. The center detent position is cali- brated for 25 kHz peak deviation on the aural output, with 0 dBm peak pro- gram audio input level. Rotating this pot changes the input levels. Page 3-2 Owner’s Manual TVM450/S/TVM550/S/TVM550II/TVM550IIS...
  • Page 19 Controls and Connections 12. BTSC INPUT – Green LED. Lights when the rear panel AUDIO switch (17) or 4.5 MHz switch (18) are in BTSC or EXT positions, respectively. 13. VIDEO TEST – 75-ohm BNC connector. Used to monitor the video output. 14.
  • Page 20 Controls and Connections Front Panel for TVM450S/TVM550S/TVM550II Models with CSG60 Audio Module Refer to Figure 3-1 for the following description: 29. LEFT CHANNEL – Seven-segment LED bar display. Indicates the peak audio deviation in percent. When the sixth bar is lit, a representation of the rear panel left input (38), when combined with the right channel input (37), produces 100 percent or 25 kHz peak aural deviation.

  • Page 21: Tvm Top Inside View

    Controls and Connections 41. CONT (Control) – Screw terminal. When grounded, switches from the left and right audio inputs to the monaural audio input. 42. 4.5 MHz OUT – 75-ohm F connector. Not used. 43. VIDEO OUT – 75-ohm F connector. Not used. 44.

  • Page 22: Dsg2000 Front And Rear Panels

    Controls and Connections 9982A Figure 3-3. DSG2000 Front and Rear Panels Page 3-6 Owner’s Manual TVM450/S/TVM550/S/TVM550II/TVM550IIS...
  • Page 23 Controls and Connections LEFT AUDIO – Seven-string LED meter. Indicates the modulation level of the left audio channel. The function is the same as in (2). SAP AUDIO – Seven-string LED meter. Indicates the modulation level of the optional SAP audio channel. The function is the same as in (2). TEST TONE –...
  • Page 24 Controls and Connections DSG2000 Rear Panel 22. 4.5 MHz OUT – F connector. The 4.5 MHz FM output. This connector is nonfunctional in this unit. 23. VIDEO/BTSC OUT – BNC connector. This connector is the output for either default or BTSC VIDEO. To change to BTSC output, see Chapter 4, page 4-12. 24.

  • Page 25: Installation And Operation

    Installation and Operation INSTALLATION AND OPERATION INSTALLATION Remove the TVM modulator from its shipping container and inspect it for any physical damage. Install the modulator into position in a 19-inch rack panel. Support the modulator while installing the four front panel mounting screws. NOTE The unit weighs approximately 15 pounds (6.8 kilograms).

  • Page 26: Typical Satellite Headend Installation

    Installation and Operation Headend All TVM-series units can be configured for multiple applications in a headend in- stallation. See Figure 4-1. The first configuration uses video and monaural audio signals made avail- able by the satellite receiver. The modulator then broadcasts on the TV channel selected on the TVM450/550/550II front panel.

  • Page 27: Operation

    Installation and Operation EXTERNAL BTSC – A baseband 600 ohm audio signal, –10 to +10 dBm peak pro- gram (0 dBm L + R optimum), can be connected to the rear panel screw terminals. In this configuration, the rear panel Audio switch should be set to BTSC. This setting turns off the internal pre-emphasis and recalibrates the seven-segment audio indicator bar display for a BTSC input mode.
  • Page 28 Installation and Operation NOTE If the FCC OFFSET LED is lit, confirm with a frequency counter whether the automatic offset is correct for the system. If it is incorrect, rotate the rear panel FCC OFFSET switch to select the correct offset. Alternately, refer to Table 4-1. Table 4-1.

  • Page 29: Cma60 Front And Rear Panels

    Installation and Operation Audio Adjustment The TVM450, TVM550 and TVM550II modulators use the CMA60 Monaural Audio module. The controls and connections unique to this module are shown in Figure 4-2. BTSC INPUT PEAK CMA60 MONO AUDIO AUDIO MODULE AUDIO DEVIATION INDICATOR DEVIATION 4.5 MHz AUDIO...

  • Page 30: Alignment Without Vits Present

    Installation and Operation Video Modulation Adjustment Make sure the video signal applied to the rear panel of the modulator is 1.0 V p-p. If vertical interval test signals (VITS) are not present, set the sync level for 0.285 V p-p, or –40 IRE. Refer to Figure 4-3. Look at the VIDEO OVER MOD LED to see if it is lit or just flickering on and off.

  • Page 31: Fcc Offset Switches

    Installation and Operation RF Level Adjustment Connect a spectrum analyzer to the RF OUTPUT jack located on the modulator rear panel. Rotate the RF LEVEL adjustment until the desired output level is achieved. The RF output is adjustable to +60 dBmV, but the unit should be operated at +58 to +60 dBmV for best results.

  • Page 32: Tvm450S And Tvm550S

    Installation and Operation TVM450S AND TVM550S TVM450S and TVM550S models incorporate, as standard, the optional CSG60 BTSC Stereo Generator Module into a standard. See Chapter 5, Figure 5-7 for the panel connections unique to these models. INPUT LEVEL (L) Adjustment Make sure that the input to the L (+) and L (–) screw terminals on the rear of the BTSC Stereo Module is a balanced 600-ohm input, with a signal amplitude of 0 dBm.

  • Page 33: Agile Irdii, Tvm450S/Tvm550S And Jerrold Interconnection

    Installation and Operation Disconnect the cable at VIDEO IN (JV01) on the PM00 board to terminate video. Set switch S501 on the P500 board to the High position. Disconnect the AURAL LOOP on the back of the unit. Replace the top cover and screws and reconnect all cables removed in step 1. Terminal Connections from TVM450S/TVM550S to Jerrold MVP See Figure 4-5 while reading this section.

  • Page 34: Tvm550Iis

    Installation and Operation TVM550IIS All aspects of operation for the TVM550IIS are the same as the TVM450S/TVM550S, but uses the DSG2000BD module instead. DSG2000BD Connections The DSG2000BD module accepts aural signals via separate inputs. Refer to Chapter 3, Figures 3-1 and 3-3, for all numbers in parentheses. Rear Panel Connect all appropriate cables between the ground connections on the rear panel terminal strip (26), (29), and/or (31) and the equipment rack ground.

  • Page 35: Dsg2000 Operation

    Installation and Operation REAR BLACK JUMPER 600 W 10 k W 600 W DIGITAL BTSC 10 k W 600 W AUDIO INTERFACE 10 k W 600 W PC BOARD 10 k W CHANGE ALL JUMPERS OPEN TO CHANGE VOLTAGE POWER SUPPLY NOTE: FACTORY SETTING IS 600 W PC BOARD...

  • Page 36: Test Tone

    Installation and Operation Auxiliary Audio Processing To select this mode, press the AUX AUDIO pushbutton (19) until the AUX AUDIO LED (7) lights. NOTE This input may also be activated by connecting the CTL terminal (32) on the module rear panel to ground. While watching the AUDIO LED strings (2, 3, and 4), adjust the LEVEL po- tentiometer (20) until the first red LED just lights.

  • Page 37: Monitoring

    Installation and Operation MONITORING The STEREO jack (10) is a 3.5 mm standard stereo jack for monitoring the quality of the stereo and monaural signals on the L and R inputs. The SAP jack (11) is a 3.5 mm standard stereo jack for monitoring monaural SAP or auxiliary signals. COMMENCING OPERATION After all front panel settings are made, connect the cables from the 4.5 MHz F con- nector (21) and VIDEO OUT BNC connector (VIDEO/BTSC) to the designated combiner...

  • Page 38: Option Installation

    Option Installation OPTION INSTALLATION CBP45 The CBP45 is a high-quality 6 MHz surface acoustic wave (SAW) filter option for use with some IF scramblers. When installed on the IF input loop to correct in- herent scrambling-process noise, the CBP45 eliminates adjacent channel inter- ference that the scrambling causes.

  • Page 39: Cbp45 Option Package

    Option Installation Verify that the CBP45 package contains the parts shown in Figure 5-2. 9681 Figure 5-2. CBP45 Option Package Contents Remove the modulator power cord from the wall socket, and disconnect all rear panel cables. To remove the modulator top cover: Remove the front mounting brackets.

  • Page 40: Connector Sites

    Option Installation CBP45-1 Verify that the CBP45-1 package contains the parts shown in Figure 5-3. 9680 Figure 5-3. CBP45-1 Package Contents Remove the modulator power cord from the wall socket, and disconnect all rear panel cables. To remove the modulator top cover: Remove the front mounting brackets.

  • Page 41: Preparing And Installing The Cable

    Option Installation See Figure 5-5, and cut the RCA connector off as near the connector as possible, and discard the connector. 9397 Figure 5-5. Preparing and Installing the Cable Slit the exposed shield its full length, less a half-inch or so, and twist it so it forms a single bundle.

  • Page 42: Cbp45-1 Installation

    Option Installation 9396 Figure 5-6. CBP45-1 Installation 14. Connect the other end of the cable to the IF Combiner PC board. 15. Remove the two screws anchoring the rear-facing half of the up/down con- verter to the chassis. 16. Align the CBP45 PC board mounting bracket holes with the up/down converter board bracket holes and reinstall the screws removed in step 15.

  • Page 43: Csg60

    Option Installation CSG60 See Figure 5-7 for panel controls and connections. 9036 Figure 5-7. CSG60 Front and Rear Panels CSG60 Installation Verify that the CSG60 package contains: • One rear panel, complete with terminal strip, a terminal/connector mounting strip, a long cable (connected to the VIDEO IN connector), and a short cable for connecting the center pins of the VIDEO IN and the VIDEO OUT jacks;...

  • Page 44: Csg60 Cable Routing

    Option Installation CSG60 Inside Operations On the PK00 board located next to the heat sink inside the TVM450 or TVM550. Follow the 3-wire cable (brown-gray-gray) to the power supply board and disconnect it there. Unplug the coaxial cable connected to JM02 on the PK00 board. Remove the PK00 board.
  • Page 45 Option Installation Install the new PK00 board in its spot inside the front panel. NOTE The remaining board and the board removed earlier are both named PK00. The new one is a double-decked chassis board, and is the only one that will fit into the space provided.

  • Page 46: Csg60 Option Pc Board Connections

    Option Installation Table 5-1. CSG60 Option PC Board Connections From Description Board Location Board Location 2-Wire Plug Rear Plate GND/CONT PK00 JK03 6-Wire Plug Rear Plate L/R/MONO PK00 JK01 Coaxial Cable (MCP) Rear Plate VIDEO IN P500 J501 Coaxial Cable (MCP) Rear Plate VIDEO OUT PK00...

  • Page 47: Cif450-1

    Option Installation CIF450-1 The CIF450-1 option allows the insertion of an external COMPOSITE IF signal. CIF450-1 Package Contents (see Figure 5-9). • One F-to-RCA connector (P/N YJ10003060) • One F-to-solder terminal connector (P/N YJ10002260) • One TMP-to-solder terminal Cable (P/N SA0425003A) •...

  • Page 48: Cif450-1 Installation

    Option Installation Install the F-to-RCA connector from the package in the upper hole, with the F connector facing outward. Disconnect the RCA-to-RCA cable from J201 to the IF combiner board at the combiner board. 10. Connect the RCA–RCA cable from connector J101 on the up/down con- verter to the top F connector as shown.

  • Page 49: Calt45

    Option Installation CALT45 The CALT45 is an optional, vertically mounted PC board that provides an ALTERNATE COMP (composite) IF IN input to the TVM-series modulators, except when the CIF450-1 option is installed. The CALT45 module is designed primarily to give users the option of quickly switching to an alternate receiver/modulator combina- tion on numerous channels for civil defense or other time-critical reasons.

  • Page 50: Calt45 Option Package Contents

    Option Installation 7075 Figure 5-11. CALT45 Option Package Contents Disconnect the power cord, and remove all cables from the unit rear panel connectors. To remove the unit top cover. Remove the unit front handles. Remove the screws from the side panel, toward the rear of the unit. Remove the cover screw from the rear panel.

  • Page 51: Calt45 Installation

    Option Installation 7076 Figure 5-12. CALT45 Installation VISUAL IF IN J302 J303 R302 AURAL IF IN J301 MEASURE RESISTANCE 7079 Figure 5-13. IF Combiner PC Board Component Locations Reinstall the IF combiner PC board : Connect one end of the supplied seven-inch TMP-to-TMP coaxial cable to location J303 on the IF combiner board.

  • Page 52: Rf Combiner Pc Board R302 Resistance

    Option Installation Table 5-2. RF Combiner PC Board R302 Resistance R302 CALT45 Test CALT45 Test Attenuation Resistance Point TP02 Point TP03 200 ohms –15 dB OFF (open, remove solder) OFF (open, remove solder) 120 ohms –12 dB ON (closed, do not remove OFF (open, remove solder) solder) 100 ohms...

  • Page 53: Remote If Select Installation

    Option Installation METAL WASHER SOLDER BLACK COLLAR REAR PANEL BLACK "HAT" RETAINER REMOTE IF SWITCH PLATE SCREW WITH ATTACHED WASHER 7073 Figure 5-14. Remote IF Select Installation Using the coaxial cable removed in step 4-b, connect JN05 on the CALT45 board to the up/down RF converter module (see Figure 4-15).
  • Page 54 Option Installation CALT45 Application Notes A minimum signal level of 38 dBmV is required at the ALTERNATE COMP IF IN port to produce a proper level (60 dBmV) at the modulator’s primary RF output. However, 38 dBmV is well above the threshold level (30 dBmV ± 3 dB) for switching to the alternate modulator.

  • Page 55: Sap Audio (Tvm550Iis)

    Option Installation SAP AUDIO (TVM550IIS) SAP Audio Parts Needed 1 SAP2000 Option Package 1 SAP PC Board 1 Ribbon Cable 1 Jumper 4 .. Screws SAP Audio Installation Procedure Remove the top cover of the unit containing the DSG2000 option package. Locate the DSG2000 Stereo PC board (see Figure 5-16).
  • Page 56 Option Installation 10084 Figure 5-16. DSG2000/SAP2000 Component Locations SAP Audio Activation To activate the SAP mode, press the MODE push-button on the DSG2000 front panel until the STR&SAP LED lights. While watching the SAP AUDIO LED string, adjust the SAP LEVEL potenti- ometer until the first red LED just lights.

  • Page 57: Agc (Tvm550Iis)

    Option Installation AGC (TVM550IIS) AGC Operation The AGC can process a Left and Right stereo pair, plus two independent audio channels (SAP and AUX). Each of the four channels enters at a rear panel con- nector and is buffered before the AGC subassembly. When the AGC is OFF, the audio signals bypass the AGC subassembly, and the normal front-panel audio adjustments are functional.
  • Page 58 Option Installation Principles of Operation With the AGC switch OFF, the AGC2000 has no effect on signal levels, and ad- justments may be made manually with the front panel controls. When ON, the gain of the four signals (LEFT, RIGHT, SAP, and AUX) are automatically con- trolled.
  • Page 59 Option Installation Specifications Input Level: +18 dBm maximum to prevent hard clipping Approaches 0 dBm (100% modulation) Output Level Limits at –2 dBm to 0 dBm Level Freeze Trigger –18 dBm decrease at input; hold for 0.5 hr High to Low: 10 sec (approx.) Response Time Low to High: 1 sec (approx.) Level Sensing...

  • Page 60: Output Headroom

    Option Installation 10201 Figure 5-17. Installing the AGC PC Board Move the jumper at P7 on the audio PC board assembly to the desired posi- tion. See Table 5-5 for output level recommendations. Table 5-5. Output Headroom Input Dynamic Range Application, Based on Maximum Excursion –6 dB Highly Compressed (Off-Air Broadcasts)
  • Page 61 9029 TVM450 Block Diagram TVM450/S/TVM550/S/TVM550II/TVM550IIS Owner’s Manual...
  • Page 62 9032 TVM550/TVM550II Block Diagram Owner’s Manual TVM450/S/TVM550/S/TVM550II/TVM550IIS...
  • Page 63 9029S TVM450S/TVM550S Block Diagram TVM450/S/TVM550/S/TVM550II/TVM550IIS Owner’s Manual...
  • Page 64 9032II TVM550IIS Block Diagram Owner’s Manual TVM450/S/TVM550/S/TVM550II/TVM550IIS...
  • Page 65 Standard Communications Corp. Satellite & Broadband Products Division Limited Warranty Standard Communications Corp. (SCC) warrants, to the original purchaser (the "Purchaser") only, that each new Satellite & Broadband product will be free from defects in materials and workmanship under conditions of normal use and service for a period of one (1) year from the date of delivery to the Purchaser.
  • Page 66 GOLD STANDARD SUPPORT PROGRAM The Gold Standard Support Program is designed to provide domestic users of our commercial systems the best possible support and service available. Here is how the program works: SEVEN-YEAR GUARANTEE In the event of technical problems requiring SCC-factory repair during the first 12 months from purchase date, SCC will warrant the cost, including parts and labor, as specified in SCC's Satellite &...
  • Page 67 INTERNATIONAL GOLD STANDARD SUPPORT PROGRAM This Gold Standard Support Program is designed to give international user of our commercial systems the best possible support and service available. Here is how the program works: • • • • WARRANTY AND SERVICE PROGRAM In the event of technical problems requiring SCC factory repair during the first 12 months from purchase date, SCC will warrant the cost, including parts and labor, as specified in SCC’s Satellite &...
  • Page 68 Please address all correspondence to: Standard Communications Corp. P.O. Box 92151, Los Angeles, California 90009-2151 Shipping Address: 1111 Knox Street, Torrance, CA 90502 Telephone: (310) 532-5300 Extension 316 or TOLL FREE – (800) 745-2445 FAX Nos.: Calif. & Int'l ONLY – (310) 532-0397 S09485105A All other states –...

This manual is also suitable for:

Tvm 450Tvm 550Tvm 450 sTvm 550 iiTvm 550 sTvm 550 ii s

Table of Contents