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DTR-4630 

I.R.T. Communications Pty Ltd | www.irtcommunications.com 

 

 

Page 5 of 17

 

Revision 02 

GENERAL DESCRIPTION

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The  IRT  DTR-4630  is  a  transmit/receive  (transceiver)  module  designed  principally  for  use  as  a  serial  data  fibre  optic 
transmission  link  for  3G-SDI,  HD-SDI  or  SD-SDI  applications  conforming  to  SMPTE  standards  424M,  292M  and  259M-C 
using  9/125  μm  single  mode  fibre.  This  enables  the  use  of  space  saving  fibre  optic  cable  for  reliable  transmission  of 
digital video signals over lengths greater than can be achieved with coaxial cable. 

 

In  addition,  the  link  may  be  used  for  ASI  transport  streams  for  use  with  MPEG  compressed  video  streams  or  other 
270 Mb/s type data. 

 

The  transmitter  section  features  automatic  input  cable  equalisation.  LED  indicators  are  provided  for  digital  signal 
presence and rate, DC power and LASER failure. 

 

A “keep link alive” signal is available to maintain optical link operation when no electrical input is present. 

 

Two inputs are provided with automatic changeover to input 2 on loss of input 1 for input signal redundancy. 

 

The  receiver  section  uses  a  choice  of  either  a  PIN  photodiode  or  APD  detector  with  signal  conditioning  and  reclocking

 

circuits. The data rate is automatically set to match the 3G-SDI, HD-SDI or SD-SDI/ASI rates dependent on the actual input 
data rate to the transmitter. 

 

Two  serial  digital  outputs  are  provided.  LED  indicators  are  provided  for  digital  signal  presence  &  type,  optical loss and 
power. 

 

Relay contact outputs are also provided for external use of alarm signals. 

 

The  DTR-4630  can  be  used  as  an  independent  transmitter  and  receiver  at  the  same  time  allowing  bi-directional 
operation  over two single mode fibres. Being independent from each other, the transmit and receive signals can be of 
mixed signal types. 

 

Optionally a 1310/1550nm WDM

2, 3

 optical combiner can be fitted to allow for combined use on a single fibre. 

 

SNMP (Simple Network Management Protocol) is available for remote monitoring when used in conjunction with an IRT 
frame fitted with SNMP capability. 

 

Standard features: 

 

Transports 3G-SDI, HD-SDI, SD-SDI or ASI signal rates. 

 

Single or bi-directional operation possible with independent transmit and receive functions on the one card. 

 

Path lengths up to 30 dB

1

 optical path loss using 9/125μm single mode fibre. 

 

Automatic changeover switching  of input for signal redundancy on Tx. 

 

LED indicators and external alarm contacts. 

 

Fibre, video and alarm connections at rear. 

 

Remote monitoring via SNMP. 

 

Optional on-board WDM

2, 3

 optical combiner for use on a single common fibre. 

 

NOTE:

 

1

  27dB path loss at 3G. Typically >30dB at HD and SD. Fitted with APD detector. 

 

2

  With WDM option fitted for combined use on a single fibre, optical path loss is reduced by approximately 2dB. 

 

3

  With WDM option fitted, when operating as a pair, one DTR-4630 must be fitted with a 1310nm laser and 

the other a 1550nm laser. 

BLOCK DIAGRAM DTR -4630 SIGNAL PATH 

Fibre Link 

9-27

*

dB path loss at 3G 

(>30dB at HD and SD) 

NOTE: * Fitted with APD detector. 3-18dB when fitted with PIN detector. 

DTR-4630 

(Tx/Rx) 

I/P 1 
I/P 2 

Fibre O/P 

Fibre I/P 

O/P 1 
O/P 2 

 
 

Alarm O/P 

DTR-4630 

(Tx/Rx) 

O/P 1 
O/P 2 

Fibre I/P 
Fibre O/P 

I/P 1 
I/P 2 

 
 

Alarm O/P 

SNMP 

SNMP 

3G-SDI 

HD-SDI 

SD-SDI 

ASI 

3

G-SDI 

HD-SDI 

SD-SDI 

ASI 

3G-SDI 
HD-SDI 
SD-SDI 
ASI 

3G-SDI 
HD-SDI 
SD-SDI 
ASI 

Содержание DTR-4630

Страница 1: ...DTR 4630 I R T Communications Pty Ltd www irtcommunications com Revision 02 3G HD SD SDI ASI Fibre Optic Transceiver User Manual...

Страница 2: ...sion Date By Change Description Applicable to 00 06 05 2013 AL Original Issue Units fitted with firmware version Dxx463xS1V1 01 19 06 2013 AL Alarm conditions and SNMP MIB descriptors corrected Units...

Страница 3: ...ation 7 User DIP switch and link settings 7 Installation 8 Signal Connections 8 Optical Connections 9 Alarm Connections 9 Front and rear layouts 10 Operation 11 Figure 1 Attenuation versus wavelength...

Страница 4: ...ns are observed All internal adjustments should only be made by suitably qualified personnel All operational adjustments are available externally without the need for removing covers or use of extende...

Страница 5: ...4630 can be used as an independent transmitter and receiver at the same time allowing bi directional operation over two single mode fibres Being independent from each other the transmit and receive si...

Страница 6: ...to 18 dBm input level at 3G SDI typically 20 dBm at HD SD SDI Available wavelengths 1310nm or 1550nm Other wavelengths available upon request Optical path loss4 5 9 to 27 dB at 3G SDI typically 30 dB...

Страница 7: ...6 OFF Enable automatic input changeover on loss of primary input IN 1 to Tx IN 1 takes priority over IN 2 ON Disable automatic input changeover SW1 7 OFF DIP switch control ON SNMP control SW1 8 OFF...

Страница 8: ...default setting of the DTR 4630 is to automatically operate at either 2 97 Gb s 3G SDI 1 485 Gb s HD SDI or 270 Mb s SD SDI ASI signals and do not require any adjustment prior to use with the excepti...

Страница 9: ...receiver part of the transceiver For the standard DTR 4630 with no WDM option fitted an external optical attenuator is supplied as standard with the unit For DTR 4630 s fitted with a WDM device only t...

Страница 10: ...7 Revision 02 Front rear panel connector diagrams N140 CAUTION Direct connections to module DC DTR 4 6 30 OPTICAL 3G HD SD Rx Tx Separate Tx Rx Fibres Standard Tx Rx Tx Mon or Rx O P link select Rx O...

Страница 11: ...of the receiver section which is used in signal presence alarm indication on detection or absence of a valid 3G HD or SD signal Single mode optical cable is directly connected to the module at the rea...

Страница 12: ...inated thus the OPTICAL alarm LED is likely to be indicating that the optical signal level is low or approaching the minimum signal strength allowed before signal failure takes place whence the receiv...

Страница 13: ...nformation and translates that information into a form compatible with SNMP The agent therefore acts as an interface between the NMS and the managed devices The NMS sends a request message and control...

Страница 14: ...T modules that are SNMP compatible may need an optional plug in SNMP module with a program relevant to the module that it is plugged into Depending on the module besides the module identification para...

Страница 15: ...ing or invalid 8 nonUrgent 2 Optical Rx input is low or cable output is muted indicating that signal is either absent or invalid 9 nonUrgent 1 2 Both nonUrgent 1 and nonUrgent 2 alarm conditions are p...

Страница 16: ...abled No Traps sent on change of electrical signal presence 2 enabled Traps automatically sent on change of electrical signal presence 3 na Not Applicable opticalStatus An indication of how the SFP op...

Страница 17: ...e Warranty on components shall be extended by IRT only to the extent obtainable from the component supplier Equipment return Before arranging service ensure that the fault is in the unit to be service...

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