Quick Guides on 3G Digital Video SFPs

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Monica Geller

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Nov 3,

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As high definition (HD) content occupies the norm in video and broadcasting industry, higher standards digital video SFPs are needed for HD or even higher standard video transmission. So there are 3G digital video SFPs suitable for SD/HD/3G-SDI. To know more about 3G digital video SFPs, please continue to read this article.

SDI Standards

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SDI, short for Serial Digital Interface, is a digital video interface standard made by SMPTE (The Society of Motion Picture and Television Engineers) organization. The serial interface transmits the data through single channel. Additional SDI standards include HD-SDI, 3G-SDI, 6G-SDI, and 12G-SDI. HD-SDI was standardized by SMPTE 372M in . It can support 1.485Gbps interface. 3G-SDI consists of a single 2.970Gbps serial link that allows replacing dual link HD-SDI.

3G Digital Video SFPs

3G Video SFP is also named Digital Video SFP. Digital video SFP modules are specially applied for SDI (Serial Digital Interface) data rates from 50 Mbps to 3 Gbps with links of 80 km over single-mode fiber. This kind of SFPs are designed to transmit optical serial digital signals as defined in SMPTE 297', specifically for robust performance in the presence of SDI pathological patterns for SMPTE 259M, SMPTE 344M, SMPTE 292M and SMPTE 424M serial rates.

Digital video SFPs are hot pluggable, easy to use, and offer the highest density optical solution for carrying digital video through optical fiber. The digital video SFP pinout is designed as one slot can be populated with a dual transmitter, dual receiver, single transmitter, single receiver, or a transceiver. Digital video SFP is a cost-effective way to solve the problems during digital video optical transmission, allow the transport of SDI and HD-SDI video signals over any optical transport system that employs MSA standard optical transceivers.

3G Digital Video SFPs Types

3G digital video SFPs include 3G SDI SFP, BiDi SFP and CWDM SFP. According to different standards, it can be divided into different types. Based on the transmission mode, it can be divided into single Tx, single Rx, dual Tx, dual Rx and TR transceivers; by standards into MSA and non-MSA; by operating wavelength into nm, nm, nm and CWDM wave length. 3G digital video SFPs also have 3G video SFP and 3G video pathological patterns due to different applications. Let's take a look at the details about 3G video pathological patterns SFP.

What are 3G-SDI pathological patterns? Pathological patterns, also called SDI proving ground, are a whole test signal. And it must be done during blackout. This signal is tough to handle by serial digital system, and significant to check the system performance. Pathological patterns often contain the richest low-frequency energy which statistically happens one per frame. Pathological patterns test is also an important indicator of video SFP modules. FS.COM 3Gbps video pathological patterns SFPs are used to transmit optical serial digital signals at the serial rates of SMPTE 259M, SMPTE 344M, SMPTE 292M and SMPTE 424M defined in SMPTE 297'. 3Gbps video pathological patterns SFPs with LC interface can transmit optical signals from 50Mbps to 3Gbps reaching the maximum distance of 40km. Both single-mode and multimode video pathological patterns SFPs are available. All modules are hot-pluggable and compatible with SFP MSA. Besides, they can be applied in 3G-SDI/HD-SDI/SD-SDI electrical-optical converter, 3G-SDI/HD-SDI/SD-SDI optical-electrical converter, HD camera or monitor system and high-density digital video routers & switches.

Conclusion

From this article, you must know some information about 3G digital video SFP. Fiberstore offers a full series of low cost but high quality 3G digital video SFPs for your applications covering the link distance of 300 m, 10 km, 20 km, 40 km and 80 km. As the advent of 4K (ultra high definition) market, the demand is growing fast for transporting the 4K in an efficient way. So just expect 6G-SDI or even 12G-SDI products researched and developed by FS.COM.

Originally published at www.fiber-optic-equipment.com

Tue Mar 22, 5:35 am

Video SFPs are specifically tested to handle certain pathological video test patterns, which result in long sequences of 1s and 0s being encoded in the digital video data stream. These types of sequences are not common in Ethernet data transmission, so data-oriented SFPs do not generally test for them. But they can occur in video signals, so if you use a data SFP that cannot handle these types of sequences, you may get errors or other visual artifacts in the video transmission. These might not happen all the time as it depends somewhat on the video content itself (as well as the SFP). But if you use video SFPs, then you don't have to worry about this issue.

A bit more about video SFPs and pathological test patterns in these articles:
https://medium.com/@julydd/quick-guides ... 3bfe12e0fa
https://download.tek.com/document/Physi ... -3.pdf

Video SFPs follow the SDI conventions for the amount of bandwidth they can handle and the resulting maximum video format that they support. So you can find the following types of SFPs:

• 1.5G HD-SDI

  - for video signals up to p30 or i60

• 3G SDI

  - for video signals up to p60

• 6G SDI

  - for video signals up to p30

• 12G SDI

  - for video signals up to p60

Blackmagic sells 3G, 6G and, 12G fiber SFPs at different price points ranging from $89 for the 3G up to $395 for the 12G. The Blackmagic 3G SFP is part number ADPT-3GBI/OPT:
https://www.bhphotovideo.com/c/product/ ... D_SFP.html

There are also various 3rd party video SFPs that in some cases are a bit less expensive, especially for the higher bandwidth SFPs. As David mentions, fs.com sells a number of different 3G video SFPs, for different types of fiber, different wavelengths, connectivity, etc. (they also sell a lot of data SFPs as well though, so you need to be careful to get a video oriented one if you shop there).

Additionally, FieldCast sells a 3G video SFP for $65:
https://www.bhphotovideo.com/c/product/ ... eiver.html

For higher bandwidths, FieldCast and ShieldRock both sell 12G SFPs for $185:
https://www.bhphotovideo.com/c/product/ ... eiver.html
https://www.bhphotovideo.com/c/product/ ... e_sfp.html

There was also an earlier discussion thread about video SFPs in the forum a few years ago that might be useful (although there seem to be more options available now, especially for higher bandwidth video SFPs):
viewtopic.php?f=4&t=&p=

Using 10G data SFPs is tempting as they tend to be less expensive, but the recommended best practice is to stick to using video SFPs for transmission of SDI video over fiber.Video SFPs are specifically tested to handle certain pathological video test patterns, which result in long sequences of 1s and 0s being encoded in the digital video data stream. These types of sequences are not common in Ethernet data transmission, so data-oriented SFPs do not generally test for them. But they can occur in video signals, so if you use a data SFP that cannot handle these types of sequences, you may get errors or other visual artifacts in the video transmission. These might not happen all the time as it depends somewhat on the video content itself (as well as the SFP). But if you use video SFPs, then you don't have to worry about this issue.A bit more about video SFPs and pathological test patterns in these articles:Video SFPs follow the SDI conventions for the amount of bandwidth they can handle and the resulting maximum video format that they support. So you can find the following types of SFPs:Blackmagic sells 3G, 6G and, 12G fiber SFPs at different price points ranging from $89 for the 3G up to $395 for the 12G. The Blackmagic 3G SFP is part number ADPT-3GBI/OPT:There are also various 3rd party video SFPs that in some cases are a bit less expensive, especially for the higher bandwidth SFPs. As David mentions, fs.com sells a number of different 3G video SFPs, for different types of fiber, different wavelengths, connectivity, etc. (they also sell a lot of data SFPs as well though, so you need to be careful to get a video oriented one if you shop there).Additionally, FieldCast sells a 3G video SFP for $65:For higher bandwidths, FieldCast and ShieldRock both sell 12G SFPs for $185:There was also an earlier discussion thread about video SFPs in the forum a few years ago that might be useful (although there seem to be more options available now, especially for higher bandwidth video SFPs):

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