evertz 7700 Series User manual

7700 MultiFrame Manual
7700ADA-AUD Balanced Analog Audio Distribution Amplifier (1x8 or 2-1x4)
Revision 1.5
TABLE OF CONTENTS
1. OVERVIEW..........................................................................................................................................1
2. INSTALLATION...................................................................................................................................4
3. SPECIFICATIONS ...............................................................................................................................6
3.1. ANALOG AUDIO INPUT.............................................................................................................6
3.2. ANALOG AUDIO OUTPUTS ......................................................................................................6
3.3. ELECTRICAL..............................................................................................................................7
3.4. PHYSICAL...................................................................................................................................7
4. STATUS INDICATOR LEDS................................................................................................................8
5. CARD EDGE CONTROLS...................................................................................................................9
6. JUMPERS..........................................................................................................................................10
6.1. SELECTING WHETHER LOCAL FAULTS WILL BE MONITORED
BY THE GLOBAL FRAME STATUS ........................................................................................11
6.2. SETTING THE AMPLIFIER CONFIGURATION .......................................................................11
6.3. SETTING THE AMPLIFIER GAIN.............................................................................................13
6.3.1. Setting the Input Gain Level...........................................................................................14
6.3.2. Setting the Output Gain Level........................................................................................15
6.3.3. Fine-Tuning the Gain Level............................................................................................15

7700 MultiFrame Manual
7700ADA-AUD Balanced Analog Audio Distribution Amplifier (1x8 or 2-1x4)
Revision 1.5
Figures
Figure 1-1: 7700ADA-AUD Block Diagram Rev 2.................................................................................................1
Figure 1-2: 7700ADA-AUD Block Diagram Rev A.................................................................................................2
Figure 1-3: 7700ADA-AUD Block Diagram Rev B.................................................................................................3
Figure 2-1: 7700ADA-AUD Rear Panel.................................................................................................................4
Figure 4-1: LED Status Indicators .........................................................................................................................8
Figure 5-1: Card Edge Controls.............................................................................................................................9
Figure 6-1: Location of Jumpers – PCB Rev 2....................................................................................................10
Figure 6-2: Location of Jumpers – PCB Rev A....................................................................................................10
Figure 6-3: Location of Jumpers – PCB Rev B....................................................................................................11
Figure 6-4: Setting the Amplifier Output Configuration – Rev 2..........................................................................12
Figure 6-5: Setting the Amplifier Output Configuration – Rev A..........................................................................12
Figure 6-6: Setting the Amplifier Output Configuration – Rev B..........................................................................13
Figure 6-7: Setting the Input Gain Level on PCB Rev 2......................................................................................14
Figure 6-8: Setting the Input Gain Level on PCB Rev B and PCB Rev. A..........................................................14
Figure 6-9: Setting the Output Gain Level...........................................................................................................15
Tables
Table 6-1: Amplifier Gain Levels on PCB Rev 2..................................................................................................13
Table 6-2: Amplifier Gain Levels on PCB Rev B and PCB Rev A.......................................................................14

7700 MultiFrame Manual
7700ADA-AUD Balanced Analog Audio Distribution Amplifier (1x8 or 2-1x4)
Revision 1.5
REVISION HISTORY
REVISION DESCRIPTION DATE
1.0 Preliminary Version Apr 02
1.1 Specifications and jumper setting info updated May 02
1.2 Updated Jumper location drawings for Rev A boards Aug 03
1.3 Updated User Manual for PCB Rev B boards Nov 06
1.4 Updated all drawings Jan 07
Added Block Diagram Rev. A
Updated Amplifier Gain Levels
1.5 General format clean up 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. The
only warranty offered by Evertz in relation to this product is the Evertz standard limited warranty, stated in the sales contract or order
confirmation form.
Although every attempt has been made to accurately describe the features, installation and operation of this product in this manual, no
warranty is granted nor liability assumed in relation to any errors or omissions unless specifically undertaken in the Evertz sales contract or
order confirmation. Information contained in this manual is periodically updated and changes will be incorporated into subsequent editions. If
you encounter an error, please notify Evertz Customer Service department. Evertz reserves the right, without notice or liability, to make
changes in equipment design or specifications.

7700 MultiFrame Manual
7700ADA-AUD Balanced Analog Audio Distribution Amplifier (1x8 or 2-1x4)
Revision 1.5
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7700 MultiFrame Manual
7700ADA-AUD Balanced Analog Audio Distribution Amplifier (1x8 or 2-1x4)
Revision 1.5 Page - 1
1. OVERVIEW
The 7700ADA-AUD Dual Analog Audio distribution amplifier is a general purpose amplifier for distributing
analog audio signals. It can be operated as two independent 4 output amplifiers for stereo signals or as a
single amplifier with 8 outputs where higher fanout is required.
The 7700ADA-AUD can be operated with either differential or single ended inputs and offers a wide range
of gain adjustment to handle a wide variety of input signals.
The 7700ADA-AUD occupies one card slot and can be housed in either a 1RU frame, which will hold up to
three modules, or a 3 RU frame, which will hold up to 15 modules.
Features:
•Differential and single ended input (automatic single ended to differential conversion)
•Configurable for stereo (2-1x4), or mono (1x8)
•High impedance inputs
•Low impedance outputs
•Wide gain adjustment range
•High common mode range and common mode rejection ratio
•Very high SNR
•Very low THD+N
•Fully balanced signal path from input to output
1st
Gain
Stage
Input Gain (*):
0 dB
+6.5 dB
1
Fine Gain:
-6.5 dB to +9.5 dB
2
*
(*) Jumper selection
Mono
Balanced
Analog Audio
Inputs
Balanced
Analog Audio
Outputs
Input Gain (*):
0 dB
+6.5 dB
Output Gain (*):
0 dB
+3.5 dB
+9.5 dB
*
Output Gain (*):
0 dB
+3.5 dB
+9.5 dB
1st
Gain
Stage
2nd
Gain
Stage
Fine Gain:
-6.5 dB to +9.5 dB
1 or 2
1 or 2
1 or 2
1 or 2
Balanced
Receiver
Balanced
Receiver
2nd
Gain
Stage
1
1
1
1
3rd Gain
Stage
3rd Gain
Stage
Stereo
Cable Drivers
Cable Drivers
Figure 1-1: 7700ADA-AUD Block Diagram Rev 2

7700 MultiFrame Manual
7700ADA-AUD Balanced Analog Audio Distribution Amplifier (1x8 or 2-1x4)
Page - 2 Revision 1.5
1st
Gain
Stage
Input Gain (*):
0 dB
+6 dB
1
Fine Gain:
-5 dB to +5 dB
2
*
(*) Jumper selection
Mono
Balanced
Analog Audio
Inputs
Balanced
Analog Audio
Outputs
Input Gain (*):
0 dB
+6 dB
Output Gain (*):
0 dB
+3.5 dB
+9.5 dB
*
Output Gain (*):
0 dB
+3.5 dB
+9.5 dB
1st
Gain
Stage
2nd
Gain
Stage
Fine Gain:
-5 dB to +5 dB
1 or 2
1 or 2
1 or 2
1 or 2
Balanced
Receiver
Balanced
Receiver
2nd
Gain
Stage
1
1
1
1
3rd Gain
Stage
3rd Gain
Stage
Stereo
Cable Drivers
Cable Drivers
Figure 1-2: 7700ADA-AUD Block Diagram Rev A
"The input gain on Rev. A modules older than November 2002 will be +6dB and the
fine gain adjustment range will be – 6.5dB to + 9.5dB.

7700 MultiFrame Manual
7700ADA-AUD Balanced Analog Audio Distribution Amplifier (1x8 or 2-1x4)
Revision 1.5 Page - 3
1st
Gain
Stage
Input Gain (*):
0 dB
+6 dB
1
Fine Gain:
-5 dB to +5 dB
2
*
(*) Jumper selection
Mono
Balanced
Analog Audio
Inputs
Balanced
Analog Audio
Outputs
Input Gain (*):
0 dB
+6 dB
Output Gain (*):
0 dB
+3.5 dB
+9.5 dB
*
Output Gain (*):
0 dB
+3.5 dB
+9.5 dB
1st
Gain
Stage
2nd
Gain
Stage
Fine Gain:
-5 dB to +5 dB
1 or 2
1 or 2
1 or 2
1 or 2
Balanced
Receiver
Balanced
Receiver
2nd
Gain
Stage
1
1
1
1
3rd Gain
Stage
3rd Gain
Stage
Stereo
Cable Drivers
Cable Drivers
Figure 1-3: 7700ADA-AUD Block Diagram Rev B
"
When using the 7700ADA-AUD module for a mono 1x8 configuration, the 3rd Gain
Stage for channel 2 on PCB Revisions 2 and A is configured separately for the
lower four outputs. On PCB Rev B, the 3rd Gain Stage for channel 1 will adjust the
gain for all 8 outputs.

7700 MultiFrame Manual
7700ADA-AUD Balanced Analog Audio Distribution Amplifier (1x8 or 2-1x4)
Page - 4 Revision 1.5
2. INSTALLATION
The 7700ADA-AUD comes with a companion rear plate that has ten 3 pin removable terminal strips. For
information on mounting the rear plate and inserting the module into the frame see section 3 of the
7700FR manual.
Figure 2-1: 7700ADA-AUD Rear Panel
The balanced 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 terminal strips on the rear
panel.
ANALOG AUDIO IN: Balanced analog audio inputs for 2 channels. Each input (+, -, GND) is on a 3 pin
removable terminal strip connector.

7700 MultiFrame Manual
7700ADA-AUD Balanced Analog Audio Distribution Amplifier (1x8 or 2-1x4)
Revision 1.5 Page - 5
"
For unbalanced audio connections, the signal wire should be connected
to the positive (+) input and the shield (GND) should be connected to the
negative (-) input.
ANALOG AUDIO OUT: There are four balanced analog audio outputs for each of the 2 input channels.
Each output (+, -, GND) is on a 3 pin removable terminal strip connector.
"
To connect an unbalanced cable to one of the balanced outputs of this card, the
positive output (+) should connect to the signal wire, and the shield of the cable
should connect to the ground terminal. The negative output (-) should be left
unconnected.
This method has some drawbacks, such as half the amplitude (6dB less) than a
balanced connection and may pick up common-mode noise with long cable
lengths.
+ -

7700 MultiFrame Manual
7700ADA-AUD Balanced Analog Audio Distribution Amplifier (1x8 or 2-1x4)
Page - 6 Revision 1.5
3. SPECIFICATIONS
3.1. ANALOG AUDIO INPUT
Standards: Any analog audio signal
Number of Inputs: 2 (Balanced or Single ended)
Connectors: 3 pin removable terminal strips
Input Step Gain: 0 dB or +6.5 dB (configurable with jumpers) on PCB Rev 2
0 dB to 6 dB (configurable with jumpers) on PCB Rev A and PCB Rev B
Fine Gain Control: -6.5 dB to +9.5 dB (card edge pot adjustable) on PCB Rev 2
-5 dB to +5 dB (card edge pot adjustable) on PCB Rev A and PCB Rev B
Maximum Input Level:
0 dB Input Gain +34 dBu
+6 dB Input Gain +28 dBu
Noise Floor: -87 dBu (0 dB input gain), -91 dBu (+6 dB input gain jumper setup)
Common Mode Rejection: > 100 dB @ 70 Hz, 65 dB @ 20 kHz (tested with +24 dBu CM input)
Common Mode Range:
0 dB Input Gain >±22 V
+6 dB Input Gain > ±7 V
Input Impedance:
0 dB Input Gain 33 kΩ
+6 dB Input Gain 15 kΩ
3.2. ANALOG AUDIO OUTPUTS
Number of Outputs:
Stereo Mode: 4 Outputs each on left and right channels
Mono Mode: 8 Outputs
Connectors: 3 pin removable terminal strips
Output Step Gain: 0, 3.5 or 9.5 dB (configurable with jumpers)
Maximum Output Level: +24 dBu across hi-impedance load
+20 dBm into 600 ohm load
Output Impedance: 66Ω
Frequency Response: +/-0.03 dB 20 Hz to 20 kHz
Stereo Phase Mismatch: < 1°@ 20 kHz
SNR: 115 dB
THD+ Noise: 0.001% 20 Hz to 20 kHz @ 28 dBu, unweighted RMS, hi-Z loads
Intermodulation Distortion: 0.001% - SMPTE @ 18 dBu
Stereo Crosstalk: >115 dB @ 1 kHz, >100 dB @ 20 kHz
Output Isolation: all outputs have independent drivers