evertz 7700 Series User manual

7700 MultiFrame Manual
7705DT Fiber Data Transceiver
Revision 1.6
TABLE OF CONTENTS
1. OVERVIEW.......................................................................................................................................... 1
2. INSTALLATION................................................................................................................................... 4
2.1. RS-232/422 SERIAL PORT AND LTC CONNECTIONS ............................................................ 4
2.2. OPTICAL CONNECTIONS......................................................................................................... 6
2.2.1. Single Fiber Versions...................................................................................................... 6
2.2.2. Dual Fiber Versions......................................................................................................... 6
2.3. CARE AND HANDLING OF OPTICAL FIBER............................................................................ 7
2.3.1. Safety.............................................................................................................................. 7
2.3.2. Handling And Connecting Fibers .................................................................................... 7
3. SPECIFICATIONS............................................................................................................................... 8
3.1. OPTICAL INPUT/OUTPUT......................................................................................................... 8
3.2. DATA INPUT/OUTPUT............................................................................................................... 8
3.3. LTC INPUT/OUTPUT.................................................................................................................. 8
3.4. ELECTRICAL ............................................................................................................................. 8
3.5. PHYSICAL.................................................................................................................................. 9
4. 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 LINK MODE................................................................................................. 10
5.3. SELECTING THE DATA COMMUNICATIONS STANDARD (RS-232 OR RS-422)................. 10
5.4. SELECTING THE DEFAULT BEHAVIOUR OF THE INPUTS WHEN THERE IS NO SIGNAL
CONNECTED ........................................................................................................................... 11

7700 MultiFrame Manual
7705DT Fiber Data Transceiver
Revision 1.6
Figures
Figure 1-1: 7705DT Block Diagram – Single Fiber Versions................................................................................2
Figure 1-2: 7705DT Block Diagram – Dual Fiber Versions ..................................................................................3
Figure 2-1: 7705DT and 7705DT-LTC Rear Panels.............................................................................................4
Figure 5-1: Jumper Locations for Rev A Modules ..............................................................................................10
Figure 5-2: Receiver Input Pullup Configuration.................................................................................................11
Tables
Table 1-1: Typical Application Configurations.......................................................................................................2
Table 2-1: DB25 Pin Connections.........................................................................................................................5

7700 MultiFrame Manual
7705DT Fiber Data Transceiver
Revision 1.6
REVISION HISTORY
REVISION DESCRIPTION DATE
0.1 Preliminary Version Nov 00
1.0 First Release Feb 01
1.1 Added info for Dual Fiber versions Mar 01
1.2 Added info for LTC versions Feb 02
1.2.1 Corrected LTC pinouts in Table 1 Jun 02
Updated infor about Mode jumper
1.3 Added 8 new CWDM wavelengths Dec 02
1.4 Corrected Table 1 Aug 03
1.5 Added Application Configuration table Aug 03
1.6 Fixed 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
7705DT Fiber Data Transceiver
Revision 1.6
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7700 MultiFrame Manual
7705DT Fiber Data Transceiver
Revision 1.6 7705DT - 1
1. OVERVIEW
The 7705DT series Fiber Data Transceivers provide an economical method of transmitting up to eight
RS-232 or four RS-422 data signals over a fiber optic link. Another 7705DT Data Transceiver facilitates
conversion back to RS-232 or RS-422 data signals at the destination. A pair of 7705DT Data
Transceivers permits bi-directional data transmission over distances up to 50 Km, with minimum possible
latency. The 7705DT-LTC versions transmit Linear Time Code (LTC) and up to seven RS-232 or four
RS-422 data signals over a fiber optic link. Another 7705DT-LTC facilitates conversion back to RS-232 or
RS-422 data signals and LTC at the destination.
Different versions of the 7705DT and 7705DT-LTC allow the user to choose the optimal function/ price /
performance ratio to suit a particular application. The FC versions and versions with no suffix are the
lowest cost, but have higher insertion losses as they receive and transmit on the same wavelength over a
single fiber. The FW versions are designed to receive and transmit on different frequencies over a single
fiber and have a lower insertion loss (The 7705DT-LTC is not available in an FW version). The F2
versions have the lowest insertion loss and are designed to receive and transmit on the same wavelength
over separate fibers.
Each version of the 7705DT is available with different laser output configurations to meet a variety of
applications. (See specifications for complete information) Two versions are suitable for single fiber or
dual fiber wave-division multiplexing (WDM) applications:
7705DT13 1310 nm FP Laser
7705DT15 1550 nm DFB Laser
There are sixteen versions with built in isolators specifically suited to coarse wave-division multiplexing
(CWDM) applications.
7705DT27 1270 nm DFB
7705DT29 1290 nm DFB
7705DT31 1310 nm DFB
7705DT33 1330 nm DFB
7705DT35 1350 nm DFB
7705DT37 1370 nm DFB
7705DT43 1430 nm DFB
7705DT45 1450 nm DFB
7705DT47 1470 nm DFB
7705DT49 1490 nm DFB
7705DT51 1510 nm DFB
7705DT53 1530 nm DFB
7705DT55 1550 nm DFB
7705DT57 1570 nm DFB
7705DT59 1590 nm DFB
7705DT61 1610 nm DFB

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7705DT Fiber Data Transceiver
7705DT - 2 Revision 1.6
The chart below shows some typical applications and power budget calculations.
Transmit Side Receive Side
Fiber Type Fiber
Links Optical/Link Budget Ordering Product Info TX Power Ordering Product Info RX Sensitivity Description
Multi-Mode 2 < 3km 7707DT13-F2 -7dBm 7707DT 13-F2 -31dBm 1310nm on Tx & Rx fibers
Single-Mode 2 24dB/60km 7707DT 13-F2 -7dBm 7707DT 13-F2 -31dBm 1310nm on Tx & Rx fibers
Single-Mode 1 17dB/40km* 7707 DT 13 -10dBm 7707DT13 -27dBm 1310nm, bi-directional, one fiber
Single-Mode 1(WDM) 28dB/70km 7707DT13M-W -1dBm 7707DT15-W -29dBm 1310nm/1550nm, WDM, bi-
directional on one fiber
Single-Mode 1(CWDM) 27dB/90km** 7707DTxx-F2 0dBm 7707DTyy-F2 -31dBm Different CWDM wavelengths on Tx & Rx, with 8 channel
CWDM Mux/Demux**
*With >20dB return loss on fiber Interface Tx Power/Rx Sensitivity are nominal values ±
1
**Assume 8 Ch Mux/Demux loss of 3.5dB Fiber Loss = 0.4/0.3dB per km @ 1310nm/15
5
Table 1-1: Typical Application Configurations
Features:
•Eight RS-232 or four RS-422 bi-directional data channels – jumper selectable
•LTC versions support LTC with seven RS-232 or four RS-422 bi-directional data channels
•Protocol independent - handles any baud rate or word length up to 1 Mb/s
•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, fiber link OK
•Tally output on Frame Status bus upon loss of input signal
Optical
Transmitter
Optical
Input/
Output
Optical
Receiver
Passive
Optics RS-232/422
Data
& LTC
Rx
Control
DIP Switches
ErrorTx
Data
Mux
Figure 1-1: 7705DT Block Diagram – Single Fiber Versions

7700 MultiFrame Manual
7705DT Fiber Data Transceiver
Revision 1.6 7705DT - 3
Optical
Transmitter
Optical
Output
Optical
Receiver
RS-232/422
Data
& LTC
Rx
Control
DIP Switches
ErrorTx
Data
Mux
Optical
Input
Figure 1-2: 7705DT Block Diagram – Dual Fiber Versions

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7705DT Fiber Data Transceiver
7705DT - 4 Revision 1.6
2. INSTALLATION
The 7705DT-FC, 7705DT-FW and 7705DT-LTC 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 7705DT-F2 and
7705-LTC-F2 versions come with a companion rear plate that has a 25 pin female D connector and two
SC/PC (shown), ST/PC or FC/PC optical connectors. For information on mounting the rear plate and
inserting the module into the frame see section 3 of the 7700FR chapter.
Figure 2-1: 7705DT and 7705DT-LTC Rear Panels
2.1. RS-232/422 SERIAL PORT AND LTC CONNECTIONS
RS-232/422 SERIAL I/O: On the 7705DT versions, this 25 pin female D connector provides
connections for up to eight RS-232 or four RS-422 serial data streams. The connector has
4 sections of serial data I/O each consisting of 2 input pins, 2 output pins and 2 ground pins
as shown in Table 2-1.
LTC/RS-232/422 SERIAL I/O: On the 7705DT-LTC versions, this 25 pin female D connector
provides connections for up to LTC and either seven RS-232 or four RS-422 serial data
streams. The connector has a pair of LTC input pins, a pair of LTC output pins, and 4
sections of serial data I/O each consisting of 2 input pins, 2 output pins and 2 ground pins
as shown in Table 2-1.

7700 MultiFrame Manual
7705DT Fiber Data Transceiver
Revision 1.6 7705DT - 5
On all versions, the SEL 1, 2, 3, and 4 jumpers located at the rear of the module determine
whether each section will be operated as a balanced RS-422 Receive and Transmit channel, or
two RS-232 Receive and Transmit channels (See section 5.3 for location of the SEL jumpers).
If flow control is required for an RS-232 data channel then one Rx/Tx pair of the section can be
used for data and the other pair can be used for flow control. If no flow control is required then
both Rx/Tx pairs may be used for data. The pins labeled Rx are inputs to the 7705DT, and the
pins labeled Tx are outputs from the 7705DT. On the 7705DT-LTC versions, the pins labeled
LTC In are LTC inputs to the 7705DT-LTC, and the pins labeled LTC Out are outputs from the
7705DT-LTC.
When the inputs are configured as RS-422 inputs, four jumpers J27, J19, J20 and J21 allow
you to determine the default state of the input when there is no signal connected. See section
5.4 for information about setting the jumpers.
Model
7705DT 7705DT-LTC
SEL4 Setting SEL4 Setting
Pin # RS232 RS422 RS232 RS422
1 Ground Ground Ground Ground
2 Tx4B Out Tx4 + Out Tx4B Out Tx4 + Out
3 Tx4A Out Tx4 – Out Tx4A Out Tx4 – Out
4 Ground Ground LTC + Out LTC + Out
5 Tx3B Out Tx3 + Out Tx3B Out Tx3 + Out
6 Tx3A Out Tx3 – Out Tx3A Out Tx3 – Out
7 Ground Ground Ground Ground
8 Tx2B Out Tx2 + Out Tx2B Out Tx2 + Out
9 Tx2A Out Tx2 – Out Tx2A Out Tx2 – Out
10 Ground Ground LTC + In LTC + In
11 Tx1B Out Tx1 + Out Tx1B Out Tx1 + Out
12 Tx1A Out Tx1 – Out --- Tx1 – Out
13 Ground Ground Ground Ground
14 Rx4B In Rx4 + In Rx4B In Rx4 + In
15 Rx4A In Rx4 – In Rx4A In Rx4 – In
16 Ground Ground LTC - Out LTC - Out
17 Rx3B In Rx3 + In Rx3B In Rx3 + In
18 Rx3A In Rx3 – In Rx3A In Rx3 – In
19 Ground Ground Ground Ground
20 Rx2B In Rx2 + In Rx2B In Rx2 + In
21 Rx2A In Rx2 – In Rx2A In Rx2 – In
22 Ground Ground LTC - In LTC - In
23 Rx1B In Rx1 + In Rx1B In Rx1 + In
24 Rx1A In Rx1 – In --- Rx1 – In
25 Ground Ground Ground Ground
Table 2-1: DB25 Pin Connections

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7705DT Fiber Data Transceiver
7705DT - 6 Revision 1.6
2.2. OPTICAL CONNECTIONS
"
In order to establish a valid link between a pair of 7705DT modules, one module
must be configured as ‘Mode A’, and the other as ‘Mode B’. Selection of the
correct mode is achieved by setting jumper J22, at the rear of the board. See
section 5.2.
"The 7705DT modules are designed to work only with single mode optical fiber.
2.2.1. Single Fiber Versions
FIBER I/O: There is one SC/PC (shown), ST/PC or FC/PC female connector with the optical
input/output from the 7705DT as shown in section 3.1. This connector should be
connected to the matching connector of another 7705DT module at the destination end with
a suitable fiber optic cable.
The 7705DT-FC, 7705DT-FW and 7705DT-LTC versions have an optical isolator built in so
that one fiber optic cable can handle a bi-directional data signal. The 7705DT-FC and
7705DT-LTC versions receive and transmit on the wavelength marked on the rear panel.
The 7705DT13-FW version transmits on 1310 nm and receives on wavelengths in the 1530
to 1570 nm range. The 7705DT15-FW and 7705DTxx-FW versions transmit on the
wavelength marked on the rear panel and received on 1310 nm.
2.2.2. Dual Fiber Versions
FIBER IN: There is one SC/PC (shown), ST/PC or FC/PC female connector with the optical input to
the 7705DT-F2 and 7705DT-LTC-F2 as shown in section 3.1. This connector should be
connected to the FIBRE OUT connector of another 7705DT-F2 or 7705DT-LTC-F2 module
at the destination end with a suitable fiber optic cable. The 7705DT-F2 and 7705DT-LTC-
F2 versions receive on wavelengths in the 1310 to 1570 nm range.
FIBER OUT: There is one SC/PC (shown), ST/PC or FC/PC female connector with the optical output
from the 7705DT-F2 and 7705DT-LTC-F2 as shown in section 3.1. This connector should
be connected to the FIBRE IN connector of another 7705DT-F2 or 7705DT-LTC-F2 module
at the destination end with a suitable fiber optic cable. The 7705DT-F2 and 7705DT-LTC-
F2 versions transmit on the wavelength marked on the rear panel.

7700 MultiFrame Manual
7705DT Fiber Data Transceiver
Revision 1.6 7705DT - 7
2.3. CARE AND HANDLING OF OPTICAL FIBER
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 7705DT modules are Class I, with a maximum output power of 2mW.
2.3.2. Handling And Connecting Fibers
"Never touch the end face of an optical fiber.
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. We recommend
that you maintain a minimum bending radius of 3 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 of this manual.

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7705DT Fiber Data Transceiver
7705DT - 8 Revision 1.6
3. SPECIFICATIONS
3.1. OPTICAL INPUT/OUTPUT
Number: 1 (Standard, FC and FW versions)
2 (F2 versions)
Connector: Female SC/PC, ST/PC or FC/PC
Input Wavelengths: 1310nm to 1610nm
Maximum Input Power: 0 dBm
Input Optical Sensitivity:
Standard version: -25dBm
FC version: -25dBm
FW version: -27dBm
F2 version: -29dBm
Output wavelengths:
Standard: 1310nm, 1550nm nominal
CWDM: 1270nm to 1610nm (see ordering information)
Output power:
1310nm FP: -7dBm ±1dBm (Standard, FC and FW versions)
-4dBm ±1dBm (F2 version)
1550nm , CWDM DFB: -3dBm ±1dBm (Standard, FC and FW versions)
0dBm ±1dBm (F2 version)
Fiber Size: 9 µm core / 125 µm overall
3.2. DATA INPUT/OUTPUT
Number of Ports:
Standard Version: 8 RS 232 or 4 RS 422 – Jumper Selectable (ports are individually configurable)
LTC Version: 7 RS 232 or 4 RS 422 – Jumper Selectable (ports are individually configurable)
Connector: Female DB-25
Baud Rate: Determined by incoming data, up to 3 MBaud
Latency: Maximum single direction latency with 1m of fiber is 500ns for RS422, 10m for
RS232. Additional latency due to fiber is 5µs/km.
3.3. LTC INPUT/OUTPUT
Standard: SMPTE 12M
Number: 1 input and 1 output.
Connector: Female DB-25.
Input Level: 0.2 to 4V p-p, balanced or unbalanced
Output Level: 1V p-p nominal, balanced
Impedance: 110 ohm balanced
3.4. ELECTRICAL
Voltage: + 12VDC
Power: 6 Watts.
EMI/RFI: Complies with FCC regulations for class A devices.
Complies with EU EMC directive.

7700 MultiFrame Manual
7705DT Fiber Data Transceiver
Revision 1.6 7705DT - 9
3.5. PHYSICAL
7700 or 7701 frame mounting:
Number of slots: 1
4. STATUS LEDS
LOCAL FAULT (LD2): This Red LED will be On when there is insufficient optical input power, 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 (LD5): This Green LED will be On when the module is operating properly.
NO LINK (LD3): This Yellow LED will be On when there is a no valid link established with another
7705DT at the destination end.
OPTICAL FAULT (LD4): This Red LED will be On when there is failure in the optical receiver or
transmitter.

7700 MultiFrame Manual
7705DT Fiber Data Transceiver
7705DT - 10 Revision 1.6
5. JUMPERS AND USER ADJUSTMENTS
LOCAL FAULT
NO LINK
EVERTZ
(A) 7705DT SFF POWER
SEL 3
FRAME STATUS
OPTICAL FAULT
+12V
GND
SEL 4
RS232
SEL 1
RS422
SEL 2
ON
OFF
J1
MODULE OK
J27
J19
J20
J21
NO
NO
NO
NO
J22
Figure 5-1: Jumper Locations for Rev A Modules
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 LINK MODE
The Link Mode setting allows each 7705DT module to distinguish it’s own signal, and that of a sister card
at the other end of a fiber link. In the case of an incomplete or damaged fiber link each 7705DT module
will see reflections or its own signal. In order to establish a valid link between a pair of 7705DT modules,
one module must be configured as ‘Mode A’, and the other as ‘Mode B’. Selection of the correct mode is
achieved by setting jumper J22, at the rear of the board. It does not matter which card is selected as Mode
A and which as Mode B, as long as they are different. Jumper J22 should be set to the ‘IN’ position on one
end of the link, and to the ‘OUT’ position on the other.
5.3. SELECTING THE DATA COMMUNICATIONS STANDARD (RS-232 OR RS-422)
There are 4 jumpers located at the rear of the module that are used to configure whether the data
channels will operate in the RS-232 or RS-422 standard. The 25 pin D connector used to connect the
data channels is divided into four sections, each consisting of a pair of inputs, a pair of outputs and a pair
of grounds. Each jumper controls one section of the connector. For simplicity, only section 1 is described
below, however the other sections operate in the same way.

7700 MultiFrame Manual
7705DT Fiber Data Transceiver
Revision 1.6 7705DT - 11
SEL 1: To set section 1 inputs and outputs to operate in the RS-232 standard, install the jumper in the
RS-232 position. In this mode, section 1 of the connector will be configured as two Rx/Tx ports
(Port 1A and Port 1B) as shown in Table 2-1.
To set section 1 inputs and outputs to operate in the RS-422 standard install the jumper in the
RS-422 position. In this mode, section 1 of the connector will be configured as one Rx/Tx port
(Port 1) as shown in Table 2-1.
5.4. SELECTING THE DEFAULT BEHAVIOUR OF THE INPUTS WHEN THERE IS NO
SIGNAL CONNECTED
Four jumpers J19, J20, J21 and J27, located at the rear of the board, control the behaviour of the RS-422
inputs for Rx2, Rx3, Rx4 and Rx1 respectively 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)

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7705DT Fiber Data Transceiver
7705DT - 12 Revision 1.6
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