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

This page left intentionally blank

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

Fine Gain:

-6.5 dB to +9.5 dB

(*) 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

Balanced

Receiver

Balanced

Receiver

2nd

Gain

Stage

3rd Gain

Stage

3rd Gain

Stage

Stereo

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

Fine Gain:

-5 dB to +5 dB

(*) 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

Balanced

Receiver

Balanced

Receiver

2nd

Gain

Stage

3rd Gain

Stage

3rd Gain

Stage

Stereo

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

Fine Gain:

-5 dB to +5 dB

(*) 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

Balanced

Receiver

Balanced

Receiver

2nd

Gain

Stage

3rd Gain

Stage

3rd Gain

Stage

Stereo

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

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