evertz 7700 Series User manual

7700 MultiFrame Manual
7705AT Fiber Audio Transmitter
Revision 1.6
TABLE OF CONTENTS
1. OVERVIEW.......................................................................................................................................... 1
2. INSTALLATION................................................................................................................................... 4
2.1. AES AUDIO AND RS-232/422 SERIAL PORT CONNECTIONS............................................... 4
2.2. OPTICAL CONNECTIONS......................................................................................................... 6
2.3. CARE AND HANDLING OF OPTICAL FIBER........................................................................... 6
2.3.1. Safety.............................................................................................................................. 6
3. SPECIFICATIONS............................................................................................................................... 7
3.1. AES AUDIO INPUTS.................................................................................................................. 7
3.2. DATA INPUT (7705AT and 7705AT-2 ONLY)........................................................................... 7
3.3. LTC INPUT (7705AT and 7705AT-2 ONLY).............................................................................. 7
3.4. OPTICAL OUTPUT..................................................................................................................... 7
3.5. AUDIO MONITORING OUTPUT ................................................................................................ 8
3.6. SYSTEM PERFORMANCE........................................................................................................ 8
3.7. ELECTRICAL ............................................................................................................................. 8
3.8. PHYSICAL.................................................................................................................................. 8
4. STATUS LEDS.................................................................................................................................... 9
4.1. MODULE STATUS LEDS........................................................................................................... 9
4.2. AUDIO MONITOR STATUS LEDS............................................................................................. 9
5. JUMPERS AND USER ADJUSTMENTS.......................................................................................... 10
5.1. SELECTING WHETHER LOCAL FAULTS WILL BE MONITORED
BY THE GLOBAL FRAME STATUS........................................................................................ 10
5.2. SELECTING THE DATA COMMUNICATIONS STANDARD (RS-232 OR RS-422) ............... 10
5.3. SELECTING THE DEFAULT BEHAVIOUR OF THE DATA INPUTS WHEN THERE IS NO
SIGNAL CONNECTED............................................................................................................. 11
5.4. MONITORING THE AES AUDIO.............................................................................................. 11

7700 MultiFrame Manual
7705AT Fiber Audio Transmitter
Revision 1.6
Figures
Figure 1-1: 7705AT Block Diagram.......................................................................................................................2
Figure 1-2: 7705AT-2 Block Diagram ...................................................................................................................3
Figure 1-3: 7705AT-8 Block Diagram ...................................................................................................................3
Figure 2-1: 7705AT Rear Panels ..........................................................................................................................4
Figure 5-1: Jumper Locations .............................................................................................................................10
Figure 5-2: Receiver Input Pullup Configuration.................................................................................................11
Tables
Table 2-1: DB25 Pin Connections.........................................................................................................................5

7700 MultiFrame Manual
7705AT Fiber Audio Transmitter
Revision 1.6
REVISION HISTORY
REVISION DESCRIPTION DATE
1.0 First Release Mar 01
1.1 Added information for 7702AT-2 and 7705AT-LTC-2 versions July 01
1.2 Added information for 7705AT-LTC versions Aug 01
Corrected pinout of DB25 on 7705AT version
1.2.1 Corrected LED descriptions Aug 01
1.3 LTC Output included in all units Oct 01
1.4 Added information for 7705AT-8 version Jul 02
1.5 Added eight new CWDM wavelengths Dec 02
1.6 Updated formatting Nov 08
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. 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
7705AT Fiber Audio Transmitter
Revision 1.6
WARNING
Never look directly into an optical fiber. Non-reversible damage to the eye can
occur in a matter of milliseconds.

7700 MultiFrame Manual
7705AT Fiber Audio Transmitter
Revision 1.6 7705AT - 1
1. OVERVIEW
The 7705AT series AES Audio Transmitter Multiplexors and 7705AR series AES Audio Receiver
Demultiplexors provide an economical method of transmitting up to six AES audio signals (twelve mono),
one RS-232/422 control signal, and linear Time Code (LTC) or eight AES audio signals (sixteen mono)
using a single wavelength on a fiber optic cable, with minimum latency. AES audio reclocking is provided
on the 7705AR for jitter reduction. The 7705AT series modules are available in 3 different versions to
meet a variety of applications. Two versions have six single-ended AES audio inputs an LTC input and
one uni-directional RS-232/422 output while the third has eight single-ended AES audio inputs.
AES Audio Inputs
Model Number Connector LTC Input RS232/422 Slots
7705AT 6 DB 25 1 1 1
7705AT-2 6 BNC 1 1 2
7705AT-8 8 DB 25 --- --- 1
The fiber optic output of the 7705AT is available with different laser output configurations to meet a variety
of applications. (See section 3 on specifications for complete information) There are sixteen
configurations with built in isolators specifically suited to coarse wave-division multiplexing (CWDM)
applications.
Model Number
Optical Transmitter 7705AT 7705AT-2 7705AT-8
1310 nm FP 7705AT13 7705AT13-2 7705AT13-8
1550 nm DFB 7705AT15 7705AT15-2 7705AT15-8
1270 nm DFB (CWDM) 7705AT27 7705AT27-2 7705AT27-8
1290 nm DFB (CWDM) 7705AT29 7705AT29-2 7705AT29-8
1310 nm DFB (CWDM) 7705AT31 7705AT31-2 7705AT31-8
1330 nm DFB (CWDM) 7705AT33 7705AT33-2 7705AT33-8
1350 nm DFB (CWDM) 7705AT35 7705AT35-2 7705AT35-8
1370 nm DFB (CWDM) 7705AT37 7705AT37-2 7705AT37-8
1430 nm DFB (CWDM) 7705AT43 7705AT43-2 7705AT43-8
1450 nm DFB (CWDM) 7705AT45 7705AT45-2 7705AT45-8
1470 nm DFB (CWDM) 7705AT47 7705AT47-2 7705AT47-8
1490 nm DFB (CWDM) 7705AT49 7705AT49-2 7705AT49-8
1510 nm DFB (CWDM) 7705AT51 7705AT51-2 7705AT51-8
1530 nm DFB (CWDM) 7705AT53 7705AT53-2 7705AT53-8
1550 nm DFB (CWDM) 7705AT55 7705AT55-2 7705AT55-8
1570 nm DFB (CWDM) 7705AT57 7705AT57-2 7705AT57-8
1590 nm DFB (CWDM) 7705AT59 7705AT59-2 7705AT59-8
1610 nm DFB (CWDM) 7705AT61 7705AT61-2 7705AT61-8

7700 MultiFrame Manual
7705AT Fiber Audio Transmitter
7705AT - 2 Revision 1.6
Features:
•Six channel versions have six single-ended AES audio inputs with one balanced linear time code input
and uni-directional RS-232/422 data input
•Sixteen channel version has eight single-ended AES audio inputs
•Supports SMPTE compliant AES audio signals with 48KHz or 96KHz sampling rate
•Low channel latency for 7705AT/AR pair
•Monitoring of AES audio via stereo head phone jack and pushbutton channel selector at card edge
•Supports multi-mode or single-mode fiber
•Fully hot-swappable from front of frame with no fiber or data channel disconnect required
•SC/PC, ST/PC or FC/PC connector options
•Card edge LEDS indicate module health, optical failure
•Tally output on Frame Status bus upon loss of input signal
6 AES
+
1 RS-232/422
Inputs
Monitoring
Head Phone
Jack
Mux
Optical
Transmitter
Control Unit
Transmitter
Fault
Pushbutton
6
6
Optical
Output
LTC input
DB25
Figure 1-1: 7705AT Block Diagram

7700 MultiFrame Manual
7705AT Fiber Audio Transmitter
Revision 1.6 7705AT - 3
1 RS-232/422
Input
Monitoring
Head Phone
Jack
Mux
Optical
Transmitter
Control Unit
Transmitter
Fault
Pushbutton
6
Optical
Output
BNC
DB25
6 AES Inputs 6
LTC Input
Figure 1-2: 7705AT-2 Block Diagram
8 AES
Inputs
Monitoring
Head Phone
Jack
Mux
Optical
Transmitter
Control Unit
Transmitter
Fault
Pushbutton
8
Optical
Output
8
DB25
Figure 1-3: 7705AT-8 Block Diagram

7700 MultiFrame Manual
7705AT Fiber Audio Transmitter
7705AT - 4 Revision 1.6
2. INSTALLATION
The one slot 7705AT and 7705AT-8 versions come with a companion rear plate that has a 25 pin female
D connector and one SC/PC (shown), ST/PC or FC/PC optical connector. The two slot 7705AT-2 version
also has 6 BNC connectors for the audio. For information on mounting the rear plate and inserting the
module into the frame see section 3 of the 7700FR chapter.
Figure 2-1: 7705AT Rear Panels
2.1. AES AUDIO AND RS-232/422 SERIAL PORT CONNECTIONS
The specific connector configuration depends on the version of the module that you have.
AES IN: On the 7705AT-2 there are 6 BNC connectors for connection of 6 unbalanced AES
channels.
On the 7705AT-8 there is a 25 Pin D connector for connection of 8 unbalanced AES
channels. Table 2-1 shows the pin definitions of the AES IN connector.

7700 MultiFrame Manual
7705AT Fiber Audio Transmitter
Revision 1.6 7705AT - 5
AES/DATA/LTC IN: On the 7705AT there is a 25 Pin D connector for connection of 6 unbalanced AES
channels, 1 RS-232/RS-422 data channel, and one differential time code channel. The
serial port portion of the connector consists of 2 in pins and 1 ground pin. The SEL 4
jumper located at the rear of the module determines whether the port will be operated as a
balanced RS-422 Receive channel, or one RS-232 Receive channel (See section 5.2 for
location of the SEL jumper). Table 2-1 shows the pin definitions for each version of the
modules.
DATA/LTC IN: On the 7705AT-2 there is a 25 Pin D connector for connection of 1 RS-232/RS-422 data
channel, and one differential time code channel. The serial port portion of the connector
consists of 2 in pins and 1 ground pin. The SEL 4 jumper located at the rear of the module
determines whether the port will be operated as a balanced RS-422 Receive channel, or
one RS-232 Receive channel (See section 5.2 for the location of the SEL jumper). Table
2-1 shows the pin definitions for each version of the modules.
When the input is configured as an RS-422 input, jumper J21 allows you to determine the
default state of the input when there is no signal connected. See section 5.3 for information
about setting the jumper.
Model
Pin # 7705AT 7705AT-8 7705AT-2
Sel 4 RS232 RS422 RS232 RS422 RS232 RS422
1 Ground Ground Ground Ground Ground Ground
2 --- --- --- --- --- ---
3 --- --- --- --- --- ---
4 Ground Ground Ground Ground Ground Ground
5 --- --- --- --- --- ---
6 --- --- --- --- --- ---
7 Ground Ground Ground Ground Ground Ground
8 --- --- --- --- --- ---
9 --- --- --- --- --- ---
10 LTC + In LTC + In --- --- LTC + In LTC + In
11 --- --- --- --- --- ---
12 --- --- --- --- --- ---
13 Ground Ground Ground Ground Ground Ground
14 --- Rx + In AES In 7 AES In 7 --- Rx + In
15 RX In Rx - In AES In 8 AES In 8 RX In Rx - In
16 Ground Ground Ground Ground Ground Ground
17 AES In 5 AES In 5 AES In 5 AES In 5 --- ---
18 AES In 6 AES In 6 AES In 6 AES In 6 --- ---
19 Ground Ground Ground Ground Ground Ground
20 AES In 3 AES In 3 AES In 3 AES In 3 --- ---
21 AES In 4 AES In 4 AES In 4 AES In 4 --- ---
22 LTC - In LTC - In --- --- LTC - In LTC - In
23 AES In 1 AES In 1 AES In 1 AES In 1 --- ---
24 AES In 2 AES In 2 AES In 2 AES In 2 --- ---
25 Ground Ground Ground Ground Ground Ground
Table 2-1: DB25 Pin Connections

7700 MultiFrame Manual
7705AT Fiber Audio Transmitter
7705AT - 6 Revision 1.6
2.2. OPTICAL CONNECTIONS
"The 7705AT modules are designed to work with either single mode or multi
mode optical fiber.
FIBER OUT: There is one SC/PC (shown), ST/PC or FC/PC female connector with the optical output
from the 7705AT as shown in section 3.1. This connector should be connected to the
FIBRE IN connector of a 7705AR module at the destination end with a suitable fiber optic
cable. The 7705AT transmits on the wavelength marked on the rear panel.
2.3. CARE AND HANDLING OF OPTICAL FIBER
"
Never touch the end face of an optical fiber. Always keep dust caps on optical fiber
connectors when not connected and always remember to properly clean the optical
end face of a connector before making a connection.
The transmission characteristics of the fiber are dependent on the shape of the optical core and therefore
care must be taken to prevent fiber damage due to heavy objects or abrupt fiber bending. Evertz
recommends that you maintain a minimum bending radius of 5 cm to avoid fiber-bending loss that will
decrease the maximum attainable distance of the fiber cable. The Evertz fiber optic modules come with
cable lockout devices, to prevent the user from damaging the fiber by installing a module into a slot in the
frame that does not have a suitable I/O module. For further information about care and handling of fiber
optic cable see section 3 of the Fiber Optics System Design chapter in the front of the binder.
2.3.1. Safety
Never look directly into an optical fiber. Non-reversible damage to the eye
can occur in a matter of milliseconds.
The laser modules used in the 7705AT modules are Class I, with a maximum output power of 2mW.

7700 MultiFrame Manual
7705AT Fiber Audio Transmitter
Revision 1.6 7705AT - 7
3. SPECIFICATIONS
3.1. AES AUDIO INPUTS
Number of Inputs:
7705AT: 6
7705AT-2: 6
7705AT-8: 8
Standard: SMPTE 276M, single ended synchronous or asynchronous AES
(synchronous AES required when sample rate converter is disabled.)
Signal Level: 1V p-p ±0.1V
Connector:
7705AT: Female DB-25
7705AT-2: 6 BNC per IEC 169-8
7705AT-8: Female DB-25
Resolution: 20 bits
Sampling Rate: 48KHz or 96KHz
Impedance: 75 Ohms unbalanced
3.2. DATA INPUT (7705AT and 7705AT-2 ONLY)
Number of Ports: 1 unidirectional RS 232 or RS 422 – jumper selectable
Connector: Female DB-25
Baud Rate: Determined by incoming data
3.3. LTC INPUT (7705AT and 7705AT-2 ONLY)
Standard: SMPTE 12M
Connector: Female DB-25.
Level: 0.2 to 4V p-p, balanced or unbalanced
3.4. OPTICAL OUTPUT
Connector: SC/PC, ST/PC or FC/PC female housing
Return Loss: < 14 dB
Rise and Fall Time: 400-700 ps
Wide Band Jitter: < 0.2 UI
Fiber Size: 9 µm core / 125 µm overall
Fiber Type: Single mode or multi mode

7700 MultiFrame Manual
7705AT Fiber Audio Transmitter
7705AT - 8 Revision 1.6
Optical Characteristics:
Model Nominal Transmit
Wavelength
Laser Feedback
Structure Line Width Optical Power
7705AT13-xxx-x 1310 nm FP < 4.5 nm -7.5 dBm
7705AT15-xxx-x 1550 nm DFB < 1 nm 0 dBm
7705AT27-xxx-x 1270 nm DFB < 1 nm 0 dBm
7705AT29-xxx-x 1290 nm DFB < 1 nm 0 dBm
7705AT31-xxx-x 1310 nm DFB < 1 nm 0 dBm
7705AT33-xxx-x 1330 nm DFB < 1 nm 0 dBm
7705AT35-xxx-x 1350 nm DFB < 1 nm 0 dBm
7705AT37-xxx-x 1370 nm DFB < 1 nm 0 dBm
7705AT43-xxx-x 1430 nm DFB < 1 nm 0 dBm
7705AT45-xxx-x 1450 nm DFB < 1 nm 0 dBm
7705AT47-xxx-x 1470 nm DFB < 1 nm 0 dBm
7705AT49-xxx-x 1490 nm DFB < 1 nm 0 dBm
7705AT51-xxx-x 1510 nm DFB < 1 nm 0 dBm
7705AT53-xxx-x 1530 nm DFB < 1 nm 0 dBm
7705AT55-xxx-x 1550 nm DFB < 1 nm 0 dBm
7705AT57-xxx-x 1570 nm DFB < 1 nm 0 dBm
7705AT59-xxx-x 1590 nm DFB < 1 nm 0 dBm
7705AT61-xxx-x 1610 nm DFB < 1 nm 0 dBm
3.5. AUDIO MONITORING OUTPUT
Number of Ports: 1
Connector: 3.5mm female audio jack
Audio Level: User adjustable with card edge potentiometer
3.6. SYSTEM PERFORMANCE
Input to Output Latency: < 1µs
3.7. ELECTRICAL
Voltage: + 12VDC
Power: 6 Watts.
EMI/RFI: Complies with FCC regulations for class A devices.
Complies with EU EMC directive.
3.8. PHYSICAL
7700 or 7701 frame mounting:
Number of slots:
7705AT: 1
7705AT-2: 2
7705AT-8: 1

7700 MultiFrame Manual
7705AT Fiber Audio Transmitter
Revision 1.6 7705AT - 9
4. STATUS LEDS
4.1. MODULE STATUS LEDS
LOCAL FAULT (LD1): This Red LED will be On when there is an optical transmitter failure or when
there is a fault in the module power supply. When the FRAME STATUS jumper
is set to the ON position the FRAME STATUS bus will also be asserted. (See
section 5.1)
MODULE OK (LD6): This Green LED will be On when the module is operating properly.
LINK (LD3): This Amber LED will be On when there is a valid link established with a
7705AR at the receiving end of the fiber optic link.
OPTICAL FAULT (LD4): This Red LED will be On when there is failure in the optical transmitter.
4.2. AUDIO MONITOR STATUS LEDS
Six LEDs (eight on the 7705AT-8) located on the lower end of the module (opposite the headphone jack)
indicate which AES channel is currently being monitored on the analog monitoring headphone jack. AES
LED 1 is located closest to the center of the module. See section 5.4 for information about operating the
audio monitor.

7700 MultiFrame Manual
7705AT Fiber Audio Transmitter
7705AT - 10 Revision 1.6
5. JUMPERS AND USER ADJUSTMENTS
LOCAL FAULT
EVERTZ
(A) 7705DT SFF POWER
FRAME STATUS
OPTICAL FAULT
+12V
GND
SEL 4
RS232 RS422
ON
OFF
J1
MODULE OK
J21 NO
LEVEL
CHANNEL
SELECT
MONITOR
LINK
Figure 5-1: Jumper Locations
5.1. SELECTING WHETHER LOCAL FAULTS WILL BE MONITORED
BY THE GLOBAL FRAME STATUS
The FRAME STATUS jumper J1 located at the front of the module determines whether local faults (as
shown by the Local Fault indicator) will be connected to the 7700FR frame's global status bus.
FRAME STATUS: To monitor faults on this module with the frame status indicators (on the PS FRAME
STATUS LED's and on the Frame's Fault Tally output) install this jumper in the On position.
(default)
When this jumper is installed in the Off position local faults on this module will not be
monitored.
5.2. SELECTING THE DATA COMMUNICATIONS STANDARD (RS-232 OR RS-422)
Jumper SEL 4 located at the rear of the module is used to configure whether the data port will operate in
the RS-232 or RS-422 standard. The data port on the 25 pin D connector consists of a pair of inputs and
a pair of grounds as shown in Table 2-1.
SEL 4: To set the port inputs to operate in the RS-232 standard, install the jumper in the RS-232
position.
To set the port inputs to operate in the RS-422 standard, install the jumper in the RS-422
position.

7700 MultiFrame Manual
7705AT Fiber Audio Transmitter
Revision 1.6 7705AT - 11
5.3. SELECTING THE DEFAULT BEHAVIOUR OF THE DATA INPUTS WHEN THERE IS NO
SIGNAL CONNECTED
Jumper J21 located at the rear of the board controls the behaviour of the RS-422 inputs when there is no
signal connected. This is not critical for most applications, and the setting will not typically affect
performance. Figure 5-2 shows a simple schematic of the receiver input. The RS-422 receiver device has
a pulldown to ground on the Rx+ input and a pullup to +5v on the Rx- input.
+5V
Rx+
1234
NO
Rx-
Figure 5-2: Receiver Input Pullup Configuration
If you want to override the default pullups set the appropriate jumper as shown in the chart below.
Jumper
on pins Function
1 & 2 Default pullups (Rx+ low, Rx- high)
2 & 3 Rx- pulled up to +5 volts, Rx+ default (low)
3 & 4 Rx+ pulled up to + 5 volts, Rx- default (high)
5.4. MONITORING THE AES AUDIO
A stereo headphone jack located at the front of the module is used to monitor the individual AES channels.
Six LEDs located on the bottom of the module opposite the headphone jack indicate the AES channel
currently being monitored. The AES1 LED is closest to the centre of the card. When the module powers
up the audio monitor jack is turned off. Press the pushbutton to select AES1 channel pair for monitoring.
The AES CH1 LED will come on. The monitoring volume level can be adjusted by turning the level
potentiometer located beside the headphone jack. Press the pushbutton one or more times to monitor
other AES channels. The appropriate LED will come on indicating which AES channel is currently being
monitored.

7700 MultiFrame Manual
7705AT Fiber Audio Transmitter
7705AT - 12 Revision 1.6
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