Table of Contents
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1.
OVERVIEW.......................................................................................................................................... 1
2.
INSTALLATION................................................................................................................................... 2
2.1. ANALOG AUDIO CONNECTIONS ............................................................................................ 3
2.2. AES AUDIO CONNECTIONS..................................................................................................... 3
2.3. AES REFERENCE CONNECTIONS .......................................................................................... 3
3.
SPECIFICATIONS............................................................................................................................... 4
3.1. ANALOG AUDIO INPUT: ........................................................................................................... 4
3.2. AES AUDIO OUTPUTS .............................................................................................................. 4
3.3. REFERENCE INPUT .................................................................................................................. 4
3.4. ELECTRICAL ............................................................................................................................. 4
3.5. PHYSICAL .................................................................................................................................. 5
4.
STATUS INDICATORS ....................................................................................................................... 5
4.1. MODULE STATUS LEDS........................................................................................................... 5
4.2. DOT-MATRIX DISPLAY ............................................................................................................. 5
4.2.1. Audio Level Bar Graphs .................................................................................................. 5
5.
CARD EDGE CONTROLS .................................................................................................................. 6
5.1. AUDIO LEVELS, HEADROOM, CLIPPING AND THE BAR GRAPHS ..................................... 6
5.1.1. Input Audio Level Calibration .......................................................................................... 6
6.
JUMPERS............................................................................................................................................ 7
BY THE GLOBAL FRAME STATUS.......................................................................................... 7
6.2. SETTING THE COARSE ANALOG INPUT GAIN RANGE........................................................ 8
6.3. CONFIGURING THE MODULE FOR FIRMWARE UPGRADES ............................................... 8
Figures
Figure 1: 7720ADC-A4 Block Diagram .................................................................................................................1
Figure 2: 7720ADC-A4 Rear Panel .......................................................................................................................2
Figure 3: Bar Graph Displays ................................................................................................................................5
Figure 4: Location of Jumpers...............................................................................................................................7
Tables
Table 1: Bar Graph Levels ....................................................................................................................................6
7720ADC-A4 Analog Audio to AES Converter
Revision 1.1
7700 MultiFrame Manual
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Summary of Contents for evertz 7700
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Page 1: Table Of Contents
7700 MultiFrame Manual 7720ADC-A4 Analog Audio to AES Converter OVERVIEW............................1 INSTALLATION........................... 2 2.1. ANALOG AUDIO CONNECTIONS .................... 3 2.2. AES AUDIO CONNECTIONS..................... 3 2.3. AES REFERENCE CONNECTIONS ..................3 SPECIFICATIONS..........................4 3.1. ANALOG AUDIO INPUT: ......................4 3.2. AES AUDIO OUTPUTS ......................4 3.3. - Page 2 Aug 03 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 effected 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 express or implied.
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Page 3: Figure 1: 7720Adc-A4 Block Diagram
7700 MultiFrame Manual 7720ADC-A4 Analog Audio to AES Converter OVERVIEW The 7720ADC-A4 is a high-quality, 24-bit, analog to digital audio converter that provides conversion of 4 balanced analog audio channels to 2 AES channels. The sampling clock may free run at 48KHz or may be locked to a DARS (Digital Audio Reference Signal) reference or composite video reference. -
Page 4: Figure 2: 7720Adc-A4 Rear Panel
7700 MultiFrame Manual 7720ADC-A4 Analog Audio to AES Converter INSTALLATION The 7720ADC-A4 modules each come with a companion rear plate that has 3 BNC connectors and two 6 pin terminal strips. For information on mounting the rear plate and inserting the module into the frame see section 3 of the 7700FR chapter. -
Page 5: Analog Audio Connections
7700 MultiFrame Manual 7720ADC-A4 Analog Audio to AES Converter 2.1. ANALOG AUDIO CONNECTIONS The 7720ADC-A4 has two 6 pin terminal blocks containing balanced analog audio input. The audio cables can be secured into the removable portion of the terminal strips using a small screwdriver. The removable part of the terminal strip is then inserted into the rear panel. -
Page 6: Analog Audio Input
7700 MultiFrame Manual 7720ADC-A4 Analog Audio to AES Converter SPECIFICATIONS 3.1. ANALOG AUDIO INPUT: Number of Inputs: Type: Balanced analog audio Connector: Removable terminal strip Input Impedance: 10k Ω minimum (differential) Sampling Frequency: 48kHz synchronous locked to reference 48 kHz ± 50 ppm free run if no reference... -
Page 7: Physical
7700 MultiFrame Manual 7720ADC-A4 Analog Audio to AES Converter 3.5. PHYSICAL 7700 or 7701 frame mounting: Number of slots: Stand Alone Enclosure: Dimensions: 14 “ L x 4.5 “ W x 1.9 “ H (355 mm L x 114 mm W x 48 mm H) Weight: approx. -
Page 8: Card Edge Controls
7700 MultiFrame Manual 7720ADC-A4 Analog Audio to AES Converter (see section 6.2). The ballistics of the bar graph displays follow the AES/EBU guidelines and have the attack time constant set to 0 seconds, and the decay time constant set to 1.5 seconds / 20 dB. -
Page 9: Selecting Whether Local Faults Will Be Monitored
7700 MultiFrame Manual 7720ADC-A4 Analog Audio to AES Converter Alternately, the current gain setting for the selected channel will be displayed. To increase the gain, press the toggle switch in the up (toward the dot matrix display) position. To decrease the gain, press the toggle switch down. -
Page 10: Setting The Coarse Analog Input Gain Range
7700 MultiFrame Manual 7720ADC-A4 Analog Audio to AES Converter When this jumper is installed in the Off position, local faults on this module will not be monitored. 6.2. SETTING THE COARSE ANALOG INPUT GAIN RANGE J13, J12, J6, J30 Eight Jumpers located near the rear of the 7720ADC-A4 module are used to set a coarse gain level.
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