Q: The maximum bandwidth of Category twisted pair cable is typically 500 MHz. How can this cable support HD-SDI which has a bandwidth requirement of 1.5 GHz?
A: The bandwidth of Category cable is primarily based on the ability to support Ethernet. On the other hand, SDI signal transmission is not as much dependent on whether the cable is twisted pair or coaxial but rather on cable length. Furthermore, since SDI has good equalization, signal attenuation (and therefore distance) is more important than bandwidth and therefore bandwidth is not defined the same way. From the technology standpoint, SDI may be compared to DSL modem technology.

Q: Can the unused twisted pairs be used for remote power without interfering with the SDI Balun video?
A: Passing DC remote power on the unused pairs should work fine. However, AC voltage maybe problematic as there can be some interference from the 60Hz AC voltage. This interference may affect the image quality depending on the type of display and its immunity to outside interference.

Q: What do you recommend for the best cable?
A: To send HD video you must use a coaxial cable with Bandwidth at least 1.5G and to send Full HD video must use coaxial cable with bandwidth at least 3G. The link cable recommended to use a high quality Coaxial Cable & BNC connector if you use a low quality coaxial cable it may case signal loss and affect the transmission distance and reliability. The tests on this HD-SDI to HDMI Adapter was with Belden 1694A RG6U cables.

Here is a distance and cable type guide that can be used with this converter: Recommended Transmission Distances.

Why not buy two - SDI Baluns today?

This product may be eligible to be purchased through the United States Governments SEWP program, similar to their GSA program.

The NASA SEWP (Solutions for Enterprise-Wide Procurement) provides the latest in Information and Communications Technology (ICT) and Audio-Visual (AV) products and services for all Federal Agencies and their approved contractors.

If you are a government agency and want to see whether HDTV Supply has this product in the SEWP database go to our our SEWP Contract Holder RedHawk IT Solutions, LLC to allow you to maybe order this product from the United States Governments SEWP program. It is very easy to place your order, go to the link above and enter HDTV Supply and there you will see a list of part numbers of what we currently have. If you do not see it than give us a call at 833-WOLFPACK (833-965-3722) and we may be able to enter it.



Our SEWP Contract Holder RedHawk IT Solutions partner has the following credentials:

• DUNS: 801957023
• TIN: 260452583
• CAGE: 4TBM6

Their SEWP Federal Contracts are:

• SEWP Contract Number: NNG15SD38B
• Group: Group B_SDVOSB
• NAICS: 541519

and

• SEWP Contract Number: NNG15SD88B
• Group: Group C
• NAICS: 541519

The SEWP Program Office manages a suite of government-wide IT products and services contracts that enable NASA and all Federal Agencies to achieve their missions and strategic initiatives by providing streamlined access to critical technologies and solutions. The Program provides best value for the Federal Government and American taxpayer through innovative procurement processes, premier customer service and outreach, acquisition insight, and partnership with Government entities and Industry.

For a complete listing of HDTV Supply products from us, or our other vendors, call 833-WOLFPACK (833-965-3722).