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Chronos

Dual 12G, Sync and Ethernet to Optical Interface

Chronos Datasheet Download PDF
The Chronos Series is an advanced remote connection system designed to transport 12G-SDI, genlock, and multi-rate Ethernet signals over a single fibre link. This versatile transmitter and receiver pair is specifically tailored to meet the needs of modern broadcasting, providing seamless connections between remote 4K cameras, control signals, and synchronisation signals at base stations.
In addition to supporting SDI, Genlock Sync and Ethernet signals, Chronos features an LC fibre optical input, allowing an additional singlemode optical signal to be transmitted over the same fibre. This capability enhances flexibility, making Chronos an ideal solution for complex setups, particularly in demanding Outside Broadcast (OB) environments due to its compact and weatherproof housing.
Connectivity is streamlined with four BNC connectors for 2x SDI video, 2x genlock in/out and one or two RJ45 Ethernet ports, alongside a dual LC optical port for fibre communication. The optical expansion port allows cascading with additional Chronos units or other optical sources operating on different wavelengths. High Band units, operating in the 1470–1610 nm range, can interconnect with Low Band units in the 1270–1410 nm range, doubling the signal capacity on a single fibre link.
  • Supports two independent SDI video signals across 12G, 6G, 3G, HD, and SD formats, with internal signal reclockers.
  • Dual genlock outputs on transmitters and a genlock input with looped output on receivers.
  • Single or Dual gigabit Ethernet ports.
  • An LC “EXP” port allows cascading with additional Chronos units – Allowing up to 4x 4K cameras to be controlled over a single fibre.
  • 12V DC input with a robust 4-pin XLR power connection.
  • Compact, robust and rugged weatherproof enclosure optimised for demanding Outside Broadcast (OB) applications.
  • 5-year warranty ensuring long-term reliability and peace of mind.

SDI Electrical Input
Connector
75 Ohm BNC per IEC 60169-8 Amendment 2
Return Loss
<-15dB to 1.485GHz
<-10dB to 3GHz
<-7dB to 6GHz
<-4dB to 12GHz
Standards
SMPTE ST 2082, SMPTE ST 2081, SMPTE ST 424, SMPTE ST 292, SMPTE ST 259,  DVB-ASI
Polarity
Non-inverting
Equalisation
Automatic rate detection and cable equalisation
70m @ 11.88Gbps
90m @ 5.94Gbps
170m @ 2.97Gbps
240m @ 1.485Gbps
400m @ 270Mbps

SDI Electrical Output
Connector
75 Ohm BNC per IEC 60169-8 Amendment 2
Return Loss
<-15dB to 1.485GHz
<-10dB to 3GHz
<-7dB to 6GHz
<-4dB to 12GHz
Standards
SMPTE ST 2082, SMPTE ST 2081, SMPTE ST 424, SMPTE ST 292, SMPTE ST 259,  DVB-ASI
Polarity
Non-inverting
Signal Level
800 mV +/- 10%
DC Offset
0 +/- 0.5 V

Sync Electrical Input/Output
Standards Composite 1V pk-pk PAL, NTSC, SECAM
Connector 75 Ohm BNC
Diff. Phase < 1º
Diff. Gain < 1% (at sub-carrier 3.58/4.43 MHz)

Ethernet Electrical Input/Output
Connector
RJ45
Number
Chronos-T & Chronos-R: 1
Chronos-TD & Chronos-RD: 2
Format
Full duplex 100/1000Base-FX Data Transmission
10/100/1000BaseT half/full duplex auto-negotiation
Standard
IEEE 802.3
802.3 10 BaseT
802.3u 100 BaseT
802.3ab 1000 BaseT

Optical Input
Connector
LC/PC
Wavelength
High Band Variant: 1470–1610 nm
Low Band Variants: 1270–1410 nm
Standards
SMPTE ST 297
Sensitivity @12G
-13dBm (max)
Sensitivity @<=6G
-14dBm (max)
Receiver Overload
-2dBm (min)

Optical Output
Connector
LC/PC
Standards
SMPTE ST 297
Power
1 to -5 dBm

Power
Connector
XLR4
Voltage
5-17VDC
Power
Chronos-T & Chronos-R: 7.5W typ
Chronos-TD & Chronos-RD: 9W typ

General
Dimensions (HxWxD)
112 x 46 x 165mm excluding connectors
112 x 46 x 178mm including connectors
Weight
500g
Operating Temperature*
0 to +70°C
Warranty
5 Years
* Specifications determined by SFP fitted. Typical values shown

“High Band” optical wavelengths in the range 1470 to 1610 nm
Chronos-T Transmitter
Dual 12G/6G/3G/HD/SD-SDI Inputs, 2x Sync output, Single Ethernet to LC fibre with expansion port. Power Supply (PS12) included.
Chronos-R Receiver
Dual 12G/6G/3G/HD/SD-SDI Inputs, 1x Sync in plus loop-out, Single Ethernet to LC fibre with expansion port. Power Supply (PS12) included.
Chronos-TD Transmitter
Dual 12G/6G/3G/HD/SD-SDI Inputs, 2x Sync output,  Dual Ethernet to LC fibre with expansion port. Power Supply (PS12) included.
Chronos-RD Receiver
Dual 12G/6G/3G/HD/SD-SDI Inputs, 1x Sync in plus loop-out,  Dual Ethernet to LC fibre with expansion port. Power Supply (PS12) included.

Low Band” optical wavelengths in the range 1270 to 1410 nm.
Chronos-T-L Transmitter
Dual 12G/6G/3G/HD/SD-SDI Inputs, 2x Sync output, Single Ethernet to LC fibre with expansion port. Power Supply (PS12) included.
Chronos-R-L Receiver
Dual 12G/6G/3G/HD/SD-SDI Inputs, 1x Sync in plus loop-out, Single Ethernet to LC fibre with expansion port. Power Supply (PS12) included.
Chronos-TD-L Transmitter
Dual 12G/6G/3G/HD/SD-SDI Inputs, 2x Sync output,  Dual Ethernet to LC fibre with expansion port. Power Supply (PS12) included.
Chronos-RD-L Receiver
Dual 12G/6G/3G/HD/SD-SDI Inputs, 1x Sync in plus loop-out,  Dual Ethernet to LC fibre with expansion port. Power Supply (PS12) included.
Discuss Chronos variants Open PDF

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