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1.
OVERVIEW......................................................................................................................................... 1
2.
INSTALLATION.................................................................................................................................. 2
2.1. AES AUDIO CONNECTIONS.................................................................................................... 3
2.2. ANALOG AUDIO CONNECTIONS ........................................................................................... 3
3.
SPECIFICATIONS.............................................................................................................................. 4
3.1. UNBALANCED AES AUDIO INPUTS (7720DAC-A4).............................................................. 4
3.2. BALANCED AES AUDIO INPUTS (7720DAC-A4-B) ............................................................... 4
3.3. ANALOG AUDIO OUTPUT: ...................................................................................................... 5
3.4. ELECTRICAL ............................................................................................................................ 5
3.5. PHYSICAL ................................................................................................................................. 5
4.
STATUS INDICATORS ...................................................................................................................... 5
4.1. MODULE STATUS LEDS.......................................................................................................... 5
4.2. CHANNEL STATUS INDICATOR LEDS................................................................................... 6
4.3. DOT-MATRIX DISPLAY ............................................................................................................ 6
4.3.1. Audio Level Bar Graphs ................................................................................................. 6
4.3.2. Detected Sample Rate Display ...................................................................................... 7
4.3.3. Detected Numerical Peak DBFS Levels Display............................................................ 7
5.
CARD EDGE CONTROLS ................................................................................................................. 8
5.1. AUDIO LEVELS, HEADROOM, CLIPPING AND THE BAR GRAPHS .................................... 8
5.1.1. Audio Level Calibration .................................................................................................. 8
6.
JUMPERS........................................................................................................................................... 9
BY THE GLOBAL FRAME STATUS......................................................................................... 9
6.2. CONFIGURING THE MODULE FOR FIRMWARE UPGRADES .............................................. 9
Figures
Figure 1: 7720DAC-A4 Block Diagram ............................................................................................................... 2
Figure 2: 7720DAC-A4-B Block Diagram............................................................................................................ 2
Figure 3: 7720DAC-A4 Rear Panels ................................................................................................................... 3
Figure 4: Bar Graph Displays .............................................................................................................................. 6
Figure 5: Location of Jumpers............................................................................................................................. 9
Tables
Table 1: Card Edge CHANNEL Status LEDs...................................................................................................... 6
Table 2: Bar Graph Levels .................................................................................................................................. 7
Table 3: Sample Rate Display............................................................................................................................. 7
7720DAC-A4 AES to Analog Audio Converter
Revision 1.2
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 7720DAC-A4 AES to Analog Audio Converter OVERVIEW............................1 INSTALLATION..........................2 2.1. AES AUDIO CONNECTIONS....................3 2.2. ANALOG AUDIO CONNECTIONS ................... 3 SPECIFICATIONS..........................4 3.1. UNBALANCED AES AUDIO INPUTS (7720DAC-A4).............. 4 3.2. BALANCED AES AUDIO INPUTS (7720DAC-A4-B) ............... 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.
- Page 3 7700 MultiFrame Manual 7720DAC-A4 AES to Analog Audio Converter OVERVIEW The 7720DAC-A4 is a high-quality, 24-bit, digital to analog audio converter that provides conversion of 2 AES channels to 4 balanced analog audio channels. The incoming sample rate may be either 48 kHz or 44.1 kHz, both within ±100 ppm limits. The 7720DAC- A4 will autodetect the sample rate.
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Page 4: Figure 1: 7720Dac-A4 Block Diagram
7700 MultiFrame Manual 7720DAC-A4 AES to Analog Audio Converter Figure 1: 7720DAC-A4 Block Diagram Dual 2 Analog Decoder Balanced Outputs AES 1 (ch1,ch2) AES Inputs (AES3-1992) Dual 2 Analog Balanced Outputs Decoder AES 2 (ch3,ch4) Level Control CONTROL/ LOCAL Module... -
Page 5: Aes Audio Connections
7700 MultiFrame Manual 7720DAC-A4 AES to Analog Audio Converter Figure 3: 7720DAC-A4 Rear Panels 2.1. AES AUDIO CONNECTIONS The 7720DAC-A4 converts unbalanced AES audio and has two BNC connectors for inputting unbalanced AES signals compatible with the SMPTE 276M standard. The 7720DAC-A4-B converts balanced AES audio and has two 3 pin terminal strips for inputting balanced AES signals compatible with the AES3-1992 standard. -
Page 6: Unbalanced Aes Audio Inputs (7720Dac-A4)
7700 MultiFrame Manual 7720DAC-A4 AES to Analog Audio Converter Caution should be exercised when connecting cable shield to the “shield ground” as this input has only a limited tolerance for any arising ground loop currents. When using 7720DAC-A4, the shield should be connected at one end of the cable, only. -
Page 7: Analog Audio Output
EMI/RFI: Complies with FCC Part 15, class A and EU EMC directive. 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: Channel Status Indicator Leds
7700 MultiFrame Manual 7720DAC-A4 AES to Analog Audio Converter 4.2. CHANNEL STATUS INDICATOR LEDS On the card edge, each channel has two indicator LEDs: one red (bottom side of the card) and one green (top side of the card). The group of LEDs closest to the toggle switch represents CHANNEL 1 (left channel in AES input 1), followed by LEDs for CHANNEL 2, 3, and 4. -
Page 9: Detected Sample Rate Display
7700 MultiFrame Manual 7720DAC-A4 AES to Analog Audio Converter display 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. Bar Graph Level dBFS... -
Page 10: Card Edge Controls
7700 MultiFrame Manual 7720DAC-A4 AES to Analog Audio Converter CARD EDGE CONTROLS On the card edge there is a toggle switch and a ten position rotary switch that are used to choose what will be displayed on the dot matrix display, and to set the gain for each of the analog channels. -
Page 11: Jumpers
7700 MultiFrame Manual 7720DAC-A4 AES to Analog Audio Converter JUMPERS FRAME STATUS MODULE STATUS EVERTZ (A) 7720DAC-A4 CHANNEL 1 CHANNEL 2 CHANNEL 3 CHANNEL 4 +12V SFF POWER Figure 5: Location of Jumpers 6.1. SELECTING WHETHER LOCAL FAULTS WILL BE MONITORED... - Page 12 7700 MultiFrame Manual 7720DAC-A4 AES to Analog Audio Converter This page left intentionally blank 7720DAC-A4-10 Revision 1.2...
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