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AGILE MODULATOR OPERATION

3.  Agile Modulator Operation

The utilized modulators are high quality, vestigial sideband units with synthesized visual and aural carriers. The frequency 

agile modulators allow front panel pushwheel switch selection of Standard, HRC or IRC Cable TV channels 2 through 135, 

or VHF/UHF Broadcast TV channels 2 through 69. The Cable TV Channel Plan in use - Standard, HRC, or IRC – has to be 

determined at time of ordering.

The heterodyne conversion system, in conjunction with the use of a SAW filter, ensures optimum vestigial selectivity for 

adjacent channel operation.

The modulator is designed to accept any standard audio/video source such as NTSC video and audio baseband signals from 

a satellite receiver, TV camera, videotape recorder, TV demodulator, Cable Set Top Box Converter, or similar signal source. 

The modulator is designed to accept standard (negative sync) polarity video at nominal 1 V p-p level.

All level controls are located on the front panel for ease of operation.

The modulator’s maximum RF Output level at IVIS Output connector is +33 dBmV and is adjustable over a 10 dB range on 

the modulator front panel by using RF Output Level control, and is adjustable an additional 20 dB by utilizing the common 

front panel attenuator.

3.1.  Agile Modulator Front Panel Controls

POWER/ERROR Indicator

Lights when the unit is powered. A flashing condition indicates an invalid channel setting or other 

conditions that would cause the unit to operate on an invalid channel. The RF output is switched 

OFF for flashing (ERROR) conditions.

AUDIO Level Control

The setting of this screwdriver adjustment determines the aural carrier deviation. Clockwise rotation 

increases the carrier deviation.

VIDEO Level Control

The setting of this screwdriver adjustment determines the video modulation level. Clockwise rotation 

increases the modulation depth.

Channel Number Switch

Sets the desired operating channel for Cable TV channels 2 through 135, or Broadcast TV channels 

2 through 69.

Mode Switch

Sets the type of channel, Cable TV (CATV) or Broadcast TV (BCTV). The first left position of the 

switch (CATV +100) sets a leading “1” FOR Cable TV channels 100 through 135.

A/V Ratio Control

This screwdriver adjustment varies the level of the aural carrier over a range from 12 to 22 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.

RF Output Level

This screwdriver adjustment permits decreasing the RF output level a maximum of 10 dB as the 

control is rotated counterclockwise.

CAUTION: USE AN INSULATED SCREWDRIVER BLADE WHEN ADJUSTING THE AUDIO, 

VIDEO, A/V, OR RF ADJUSTMENTS.  THIS WILL PREVENT THE POSSIBILITY OF SHORTING 

CIRCUITRY TO THE FRONT PANEL IN THE EVENT THAT THE SCREWDRIVER SLIPS OUT OF 

THE SLOT IN THE PLASTIC SHAFT OF THE POTENTIOMETER.

          MDU Solutions

®

 – IVIS Indoor Video Insertion System - Instalation & Operation Manual 

3-1

 

CHAPTER 3:  AGILE MODULATOR OPERATION

CHAPTER 2:  INSTALLATION

Figure #2:  Agile Modulator

Содержание ivis

Страница 1: ...IVIS Indoor Video Insertion System Installation Operation Manual IVIS ...

Страница 2: ...o change without notice MDU Solutions UCrypt DigiVu and VersAtive Pro are registered trademarks of ATX in the United States and or other countries Products or features contained herein may be covered by one or more U S or foreign patents Adobe Flash Wikipedia and other non ATX product and company names mentioned in this document are the property of their respective companies ...

Страница 3: ...MODULATOR OPERATION 3 1 3 1 Agile Modulator Front Panel Controls 3 1 4 RF LEVEL ADJUSTMENT 4 1 5 SERVICE SUPPORT 5 1 5 1 Contact ATX Networks 5 1 5 2 Warranty Information 5 1 5 3 Safety 5 1 i MDU Solutions IVIS Indoor Video Insertion System Instalation Operation Manual i ...

Страница 4: ...Index of Figures Figures 1 IVIS Unit 1 1 2 Agile Modulator 3 1 3 Functional Schematic 4 1 ii MDU Solutions IVIS Indoor Video Insertion System Instalation Operation Manual ...

Страница 5: ...Standard HRC or IRC The RF channel deletion filter frequencies must be specified at time of order always for both modulator types as the filter is not agile If an agile modulator is purchased and the operator needs to change the channel to be deleted only the channel deletion filter must be replaced The agile modulator will easily tune to the new channel where fixed modulators need to be removed f...

Страница 6: ...1 2 MDU Solutions IVIS Indoor Video Insertion System Instalation Operation Manual CHAPTER 1 INTRODUCTION This page left intentionally blank ...

Страница 7: ...the incoming Cable TV feed to the INPUT port and connect the OUTPUT port to your distribution system Connect Video and Audio signals to one or both if two Video Audio sources present Modulators In case of an Agile Modulator ensure that the Modulator Channel is set properly by checking the displayed Channel number on the Modulator s front panel MDU Solutions IVIS Indoor Video Insertion System Insta...

Страница 8: ...CHAPTER 2 INSTALLATION 2 2 MDU Solutions IVIS Indoor Video Insertion System Instalation Operation Manual This page left intentionally blank ...

Страница 9: ...g or other conditions that would cause the unit to operate on an invalid channel The RF output is switched OFF for flashing ERROR conditions AUDIO Level Control The setting of this screwdriver adjustment determines the aural carrier deviation Clockwise rotation increases the carrier deviation VIDEO Level Control The setting of this screwdriver adjustment determines the video modulation level Clock...

Страница 10: ...3 2 MDU Solutions IVIS Indoor Video Insertion System Instalation Operation Manual CHAPTER 3 AGILE MODULATOR OPERATION This page left intentionally blank ...

Страница 11: ...dB below the Video Carrier If not adjust theA V potentiometer on the Modulator s front panel until the Audio to Video Ratio is set to 15 dB All previous measurements are to be done using a spectrum analyzer or RF signal level meter If using Spectrum Analyzer for measuring Analog and Digital RF Signals Be sure to have taken into account RBW settings and have made corrections to the Spectrum Analyze...

Страница 12: ...CHAPTER 4 RF LEVEL ADJUSTMENT 4 2 MDU Solutions IVIS Indoor Video Insertion System Instalation Operation Manual This page left intentionally blank ...

Страница 13: ...3 Safety IMPORTANT FOR YOUR PROTECTION PLEASE READ THE FOLLOWING WATER AND MOISTURE Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings POWER SOURCES The device should be connected to a power supply only of the type described in the operating instructions or as marked on the device GROUNDING OR POLARIZATION Precautions should be taken so...

Страница 14: ...n Canada Rev 04 16 ANW0781 1 501 Clements Road West Ajax ON L1S 7H4 Canada Tel 1 905 428 6068 Toll Free 1 800 565 7488 Fax 1 905 427 1964 Toll Free Fax 1 866 427 1964 www atxnetworks com support atxnetworks com ...

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