Table of Contents
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1.
OVERVIEW.......................................................................................................................................... 1
2.
INSTALLATION................................................................................................................................... 2
3.
SPECIFICATIONS............................................................................................................................... 3
3.1. ANALOG VIDEO INPUT ............................................................................................................. 3
3.2. ANALOG VIDEO OUTPUTS....................................................................................................... 3
3.3. ELECTRICAL ............................................................................................................................. 4
3.4. PHYSICAL .................................................................................................................................. 4
4.
STATUS LEDS .................................................................................................................................... 5
5.
CIRCUIT DESCRIPTION..................................................................................................................... 6
6.
JUMPERS AND USER ADJUSTMENTS ............................................................................................ 7
BY THE GLOBAL FRAME STATUS .......................................................................................... 7
6.2. SELECTING THE INPUT TERMINATION .................................................................................. 7
6.3. SELECTING THE INPUT AC/DC COUPLING ............................................................................ 7
6.4. DC RESTORING (CLAMP) OPERATION................................................................................... 8
6.5. GAIN ADJUSTMENT.................................................................................................................. 8
6.6. CABLE EQUALIZATION OPERATION...................................................................................... 9
Figures
Figure 1-1: 7700ADA7-EQ Block Diagram............................................................................................................1
Figure 2-1: 7700ADA7-EQ Rear Panel .................................................................................................................2
Figure 6-1: LED and Jumper Locations ................................................................................................................7
7700ADA7-EQ Equalizing Analog Video Distribution Amplifier
TABLE OF CONTENTS
Revision 1.2
7700 MultiFrame Manual
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Summary of Contents for evertz 7700ADA7-EQ MultiFrame
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Page 1: Table Of Contents
7700 MultiFrame Manual 7700ADA7-EQ Equalizing Analog Video Distribution Amplifier TABLE OF CONTENTS OVERVIEW............................1 INSTALLATION........................... 2 SPECIFICATIONS..........................3 3.1. ANALOG VIDEO INPUT ......................3 3.2. ANALOG VIDEO OUTPUTS....................... 3 3.3. ELECTRICAL ..........................4 3.4. PHYSICAL ..........................4 STATUS LEDS ............................ 5 CIRCUIT DESCRIPTION........................ -
Page 2: Revision History
Sept 09 Information contained in this manual is believed to be accurate and reliable. However, Evertz assumes no responsibility for the use thereof nor for the rights of third parties, which may be affected in any way by the use thereof. Any representations in this document concerning performance of Evertz products are for informational use only and are not warranties of future performance, either expressed or implied. -
Page 3: Overview
7700 MultiFrame Manual 7700ADA7-EQ Equalizing Analog Video Distribution Amplifier OVERVIEW The 7700ADA7-EQ Equalizing Analog Distribution Amplifier is a general purpose amplifier for distributing analog video signals. The 7700ADA7-EQ features one balanced equalized input with seven outputs. The 7700ADA7-EQ amplifier has been designed to distribute a wide range of analog video signals. It can also distribute other pulses and signals that are less than 2Vp-p. -
Page 4: Installation
7700 MultiFrame Manual 7700ADA7-EQ Equalizing Analog Video Distribution Amplifier INSTALLATION The 7700ADA7-EQ comes with a companion rear panel overlay that can be placed over the rear panel BNC connectors to identify their function. For information on inserting the module into the frame see section 3 of the 7700FR chapter. -
Page 5: Specifications
7700 MultiFrame Manual 7700ADA7-EQ Equalizing Analog Video Distribution Amplifier SPECIFICATIONS Note: At the time of printing, this product has only been qualified for use with standard definition signals. It, however, has been designed to work with high definition signals. Frequency, phase response as well as cable equalization will not be optimized at the upper frequency range of high definition video bandwidths. -
Page 6: Electrical
7700 MultiFrame Manual 7700ADA7-EQ Equalizing Analog Video Distribution Amplifier 3.3. ELECTRICAL Voltage: + 12VDC Power: 5 Watts 3.4. PHYSICAL Number of Slots: Page - 4 Revision 1.2... -
Page 7: Status Leds
0.6µsec wide, the green HD PRES LED is illuminated. If neither sync size is present, both LEDs are turned off. This technique will also successfully detect HD signals with bi-level sync generated by Evertz DACs for applications with computer monitors. Other manufacturer’s DACs may not have the same sync size so the detection may not work with these signals. -
Page 8: Circuit Description
7700 MultiFrame Manual 7700ADA7-EQ Equalizing Analog Video Distribution Amplifier CIRCUIT DESCRIPTION The input signal enters the board through a BNC with isolated ground so that balanced input processing may be done to remove any common mode hum that may have been added to the signal and ground shield. -
Page 9: Jumpers And User Adjustments
7700 MultiFrame Manual 7700ADA7-EQ Equalizing Analog Video Distribution Amplifier JUMPERS AND USER ADJUSTMENTS MODULE STATUS SLOW FAST GAIN CLAMP EQ CTRL CLAMP CLAMP LEVEL SHIELD FLOAT HD PRES CABLE SD PRES VIDEO HIGH SYNC HIGH SYNC LOW FRAME STATUS (1)7700ADA7 +12V Figure 6-1: LED and Jumper Locations 6.1. -
Page 10: Dc Restoring (Clamp) Operation
1125-line high definition video will be supported. The clamp position and size will successfully DC restore HD signals with bi-level sync generated by Evertz DACs for applications with computer monitors. Other manufacturer’s DACs may not have the same sync size and the DC restoring may not work with these signals. -
Page 11: Cable Equalization Operation
7700 MultiFrame Manual 7700ADA7-EQ Equalizing Analog Video Distribution Amplifier 6.6. CABLE EQUALIZATION OPERATION With the cable equalizer EQCTRL POT set fully counter-clockwise, the cable equalizer will be set to the "zero length". As you turn the POT clockwise, more cable equalization is added. To set the POT to the correct position, perform the following calibration: 1. - Page 12 7700 MultiFrame Manual 7700ADA7-EQ Equalizing Analog Video Distribution Amplifier This page left intentionally blank Page - 10 Revision 1.2...
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