Standard Communications TVM Series Manuel utilisateur

TVM450/S/TVM550/S

TVM550II/TVM550IIS

OWNER’S MANUAL

This manual is intended for use by the end user and qualified technicians. It

includes all necessary information pertaining to TVM-series Modulator appli-

cations and installation. 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 proprietarysubject matter of Standard Communications Corp. All de-

sign, manufacture, reproduction, use and sale rights regarding the same are

expressly reserved. This manual may not be reproduced without written con-

sent from Standard Communications Corp. All copyright, patent and trade

secrets are expressly reserved by Standard Communications Corp.

Printed: 05/99

Page ii Owner’s Manual TVM450/S/TVM550/S/TVM550II/TVM550IIS

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:

WARNING: TO REDUCE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT

EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE!

See the IMPORTANT SAFEGUARDS on the following pages for additional safety instructions.

This symbol means that dangerous voltage levels are present within the

equipment. These voltages are not insulated, and may be of sufficient

strength to cause bodily injury if touched. The symbol may also appear on

schematics.

This symbol calls attention to a critical procedure, or means refer to the

instruction manual for operating or service information. Only qualified service

personnel are to install or service the equipment. The symbol may also

appear in text and on schematics.

TVM450/S/TVM550/S/TVM550II/TVM550IIS Owner’s Manual Page iii

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.

2. Retain This Instruction Manual − Safety and operating instructions should

be retained for future reference.

3. Heed Warnings − All warnings on the equipment and in this Owner's Manual

should be adhered to.

4. Cleaning − Unplug the equipment from the AC power outlet before cleaning.

Do not use liquid or aerosol cleaners.

5. Water and Moisture − Do not operate the equipment in high-humidity areas.

6. Ventilation − Do not block or cover slots and openings in this equipment.

These are provided for ventilation and protection from overheating.

7. Power Sources − Operate this equipment only from the type of power source

indicated on the rear panel.

8. Grounding or Polarization − This equipment may be equipped with a

polarized AC 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 into the outlet, try reversing the plug. If the plug

still does not fit, contact your electrician to replace your obsolete outlet. Do

not defeat the safety purpose of a polarized plug.

9. Servicing −Refer all servicing to qualified SCC personnel. Opening or removing

covers may expose dangerous voltages.

10. Replacement Parts − When replacement parts are required, make sure the

service technician uses only replacement parts recommended by SCC. Un-

authorized substitutions may result in fire, electric shock, or improper opera-

tion of the unit.

11.Safety Check − Upon completion of any service or repair to the equipment,

ask the service technician to perform safety checks to determine that the

equipment is in proper operating condition.

12.Lightning − For added protection during a lightning storm or when the

equipment is left unattended or unused for long periods, unplug it from the

power outlet and disconnect the cables between the equipment and the an-

tenna subsystem. These precautions will prevent damage to the equipment

that could be caused by lightning strikes or power line surges.

Page iv Owner’s Manual TVM450/S/TVM550/S/TVM550II/TVM550IIS

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).

TO SATELLITE

RECEIVER

8 FEET

GROUNDING ELECTRODE

IN COMPLIANCE WITH

NEC 810-21/NEC 820-22/

NEC 820-40

GROUND CLAMP

ANTENNA DISCHARGE

UNIT (SEE NOTE 2)

CONNECT TO THE NEAREST

ACCESSIBLE LOCATION ON THE

STRUCTURE SYSTEM

FEED LINE

GROUND CONNECTIONS

(SEE NOTE 1)

NOTES:

1. USE #10 AWG (5.3 MM

) COPPER, #8

AWG (8.4 MM

) ALUMINUM, OR #17

AWG (1.0 MM

) COPPER-CLAD STEEL

OR BRONZE WIRE, OR LARGER, AS

THE GROUND WIRE.

2. MOUNT THE ANTENNA DISCHARGE UNIT

AS CLOSE AS POSSIBLE TO WHERE THE

FEED LINE ENTERS THE BUILDING.

9001

Figure 1. Typical Antenna Grounding

CONTENTS

TVM450/S/TVM550/S/TVM550II/TVM550/IIS Owner’s Manual Page v

SAFETY CONSIDERATIONS ...............................................................................ii

IMPORTANT SAFEGUARDS...............................................................................iii

GENERAL INFORMATION................................................................................1-1

DESCRIPTION OF THE TVM450/TVM550...........................................................1-1

DESCRIPTION OF THE TVM550II/TVM550IIS....................................................1-1

FEATURES.................................................................................................................1-2

SPECIFICATIONS..................................................................................................2-1

CONTROLS AND CONNECTIONS................................................................3-1

INSTALLATION AND OPERATION...............................................................4-1

INSTALLATION..........................................................................................................4-1

INTERCONNECTION...............................................................................................4-1

OPERATION...............................................................................................................4-3

TVM450/TVM550/TVM550II..................................................................................4-3

TVM450S AND TVM550S.....................................................................................4-8

TVM550IIS..............................................................................................................4-10

DSG2000 OPERATION..........................................................................................4-11

TEST TONE..............................................................................................................4-12

CHANGING TO BTSC OUTPUT OPERATION..................................................4-12

CHANGING TO COMPOSITE OUTPUT.............................................................4-12

MONITORING..........................................................................................................4-13

COMMENCING OPERATION...............................................................................4-13

DSG2000 USER-ACCESSIBLE JUMPERS........................................................4-13

OPTION INSTALLATION....................................................................................5-1

CBP45.........................................................................................................................5-1

CBP45-1......................................................................................................................5-3

CSG60.........................................................................................................................5-6

CIF450-1....................................................................................................................5-10

CALT45.....................................................................................................................5-12

SAP AUDIO (TVM550IIS).......................................................................................5-18

AGC (TVM550IIS)....................................................................................................5-20

BLOCK DIAGRAMS

LIMITED WARRANTY

DOMESTICGOLDSTANDARDSUPPORT PROGRAM

INTERNATIONAL GOLD STANDARD SUPPORT PROGRAM

Contents

Page vi Owner’s Manual TVM450/S/TVM550/S/TVM550II/TVM550/IIS

FIGURES

1. 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. TypicalSatelliteHeadend Installation.................................................................4-2

4-2. CMA60 Front and Rear Panels ....................................................................4-5

4-3. Alignment Without VITS Present..................................................................4-6

4-4. FCC Offset Switches......................................................................................4-7

4-4. CBP45 Option Package.................................................................................4-6

4-5. Agile IRDII, TVM450S/TVM550S and Jerrold Interconnection...............4-9

4-6. Changing Jumpers.......................................................................................4-11

5-1. CBP45 Wiring and PC Board Locations .....................................................5-1

5-2. CBP45 Option Package Contents................................................................5-2

5-3. CBP45-1 Package Contents.........................................................................5-3

5-4. Connector Sites..............................................................................................5-3

5-5. Preparing and Installing the Cable...............................................................5-4

5-6. CBP45-1 Installation.......................................................................................5-5

5-7. CSG60 Front and Rear Panels.....................................................................5-6

5-8. CSG60 Cable Routing ...................................................................................5-7

5-9. CIF450-1 Option Package Contents..........................................................5-10

5-10. CIF450-1 Installation....................................................................................5-11

5-11. CALT45OptionPackage Contents..................................................................5-13

5-12. CALT45 Installation......................................................................................5-14

5-13. IF Combiner PC Board Component Locations.........................................5-14

5-14. Remote IF Select Installation......................................................................5-16

5-15. REMOTE IF SELECT and ALTERNATE COMP IF IN Rear

Panel Locations..........................................................................................5-16

5-16. DSG2000/SAP2000 Component Locations .............................................5-19

5-17. Installing the AGC PC Board......................................................................5-23

TABLES

4-1. CATV Channels and Frequencies...............................................................4-4

4-2. Audio Board Jumper Functions..................................................................4-13

4-3. FM Board Jumper Functions.......................................................................4-13

4-4. Stereo Processor Board Jumper Functions .............................................4-13

5-1. CSG60 Option PC Board Connections.......................................................5-9

5-2. RF Combiner PC Board R302 Resistance...............................................5-15

5-3. AGC in OFF Mode........................................................................................5-20

5-4. Steady-State Output vs. Input.....................................................................5-20

5-5. Output Headroom......................................................................................56-23

General Information

TVM450/S/TVM550/S/TVM550II/TVM550IIS Owner’s Manual Page 1-1

1 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.

Both modulators use an open-architecture circuit and chassis design that allows

system growth with multiple field configurations.

The TVM450/S and TVM550/S are designed to be the primary building blocks of

an intelligent CATV distribution system. At the heart of these modulators is

SCC's PLL-synthesized, dual-conversion up/down converter.

The conversion process uses SCC's high-level mixing, which eliminates out-of-band

noise floor and spurious emission problems. High-level mixing and superior design

allow the TVM450/S and TVM550/S to meet the NTC-7-recommended specifications

for a 550 MHz spectrum, without the use of external bandpass filters.

The TVM550/S and TVM550/S modulators use a unique nonvolatile microprocessor

tuning circuit. Available is an optional Composite IF Loop kit that allows the external

input of either aural, visual, or a composite IF signal through a special loop. An

alternate IF option is also available.

Channels are selected with a front panel rotary switch, and the modulators can

be set to only a legitimate output frequency. When a modulator is on line and the

frequency output is changed, a circuit mutes the RF output until the modulator

has locked onto the new output channel frequency.

Front panel potentiometers for varying video modulation, audio deviation, and

visual/aural carrier ratio have center detents. This type potentiometer allows the user to

leave the front panel controls in their center positions while properly adjusting receiver

outputs to the modulator's correct input levels. RF output is also controlled by a like

potentiometer. The user can adjust the satellite receiver, for 1.0 V p-p video and

0 dBm peak audio/Broadcast Television Standards Committee (BTSC) input levels,

without the use of expensive test equipment.

DESCRIPTION OF THE TVM550II/TVM550IIS

SCC’s superior circuit construction is carried over from previous TVM models.

These new models differ from the preceding TVM550 models in that they sport a

much-improved power supply that reduces noise and improves reliability. The

TVM550II uses the CMA60 audio demodulator, while the TVM550IIS

incorporates an SCC DSG2000BD digital stereo audio demodulator.

General Information

Page1-2 Owner’s Manual TVM450/S/TVM550/S/TVM550II/TVM550IIS

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

•Virtually spurious-free RF performance across the entire output ranges

•Seven-segment, calibrated audio deviation bar meter, with BTSC input

indicator and factory-calibrated front panel controls with center detents

•RF output muting and visual lock indicator

•Visual and aural IF loop-through, compatible with all RF scrambling

systems

•Automatic/manual FCC offsets, with RF output stability exceeding all

specifications

•Share Assembly Program (SAP) audio and automatic gain control (AGC)

available on the TVM550 series II models

•TVM550IIS has integrated digital stereo modulator – compatible with all

RF scrambling systems, as well as with baseband scrambling

•Gold Standard Support Program, Seven-Year Guarantee, with SCC's

outstanding Lifetime Loaner Program

Specifications

TVM450/S/TVM550/S/TVM550II/TVM550IIS Owner’s Manual Page 2-1

2 SPECIFICATIONS

TVM450/S/TVM550/S/TVM550II/TVM550IIS

SPECIFICATIONS

GENERAL

Primary Power 115 VAC

Line Frequency 50 to 60 Hz

Power Consumption

TVM450 40 W (With Option)

TVM550/TVM550II/TVM550IIS 50 W (With Option)

Operating Temperature Range –14 to +122 F (–10 to +50 C)

Operating Humidity Range (Noncondensing) 0 to 90%

Operating Altitude Range 0 to 25,000 ft (0 to 7620 meters)

Dimensions (H x W x D) 1.75 x 19 x 19 in. (44.5 x 482 x 480 mm)

Weight 14.3 lb (6.5 kg)

VIDEO CHARACTERISTICS

Input Level for 87.5% Modulation ±1.0 V p-p

Input Level Range 0.5 to 1.5 V p-p

Input Impedance 75 ohms

Frequency Response 1.5 dB

Field-Time Waveform Distortion 3 IRE

Short-Time Waveform Distortion 4 IRE

Line-Time Distortion 5 IRE

Vertical Interval Distortion 2 IRE

Luminance Nonlinearity 5%

Differential Gain (87.5% Modulation; 10–90% APL) 3%

Differential Phase (87.5% Modulation; 10–90% APL) 1.3 degrees

Chrominance-Luminance Intermodulation 3%

Chrominance-Luminance Gain Inequality 9 IRE

Chrominance-Luminance Delay Inequality ±75 nsec

Chrominance Nonlinear Gain 5%

Chrominance Nonlinear Phase 3.0 Degrees

Signal-to-Noise Ratio (Luminance Weighted) ∫63 dB

AUDIO CHARACTERISTICS

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Ce manuel convient aux modèles suivants

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