Tag: ldpc

David Koblinski – Vice President of Marketing and Business Development, Datum Systems

David Koblinski – Vice President of Marketing and Business Development, Datum Systems

SP: For those SatcomPost readers not yet familiar with Datum Systems, please provide a high-level description of Datum, markets addressed, main products and key differentiators. Koblinski: Datum Systems is located in the heart of Silicon Valley and has been manufacturing the industry’s highest performing and most reliable satellite modem for about 20 years.  We focus […]

February 17, 2014 | By More
Datum Systems brings advanced Sharp Carrier Filter Roll-Off Technology

Datum Systems brings advanced Sharp Carrier Filter Roll-Off Technology

Datum Systems now offers improved Low Excess Bandwidth (Alpha) Filtering, in its new M7 line of Modems that allow carrier spacing at frequency offsets below 10% of the symbol rate.  Datum currently offers down to a 5% Alpha, which means that carriers can be spaced at 1.05 times the symbol rate instead of the historical […]

November 11, 2013 | By | 3 Replies More
Calculate Bandwidth Savings with Sharper Roll-off Filters

Calculate Bandwidth Savings with Sharper Roll-off Filters

With advanced satellite modems closely approaching the limits of spectral efficiency and configuration flexibility, industry efforts have more recently focused on reducing the transmit and receive filter roll-off factor (carrier spacing) by as much as possible without impacting modems error correction capability.  The combination of shaper roll-off filters and advanced FEC coding (like granular LDPC) […]

June 4, 2013 | By | 2,180 Replies More
The Most Flexible and Efficient SCPC modem

The Most Flexible and Efficient SCPC modem

Datum Systems markets its products as “precision satellite modems” and claims to have designed industry’s most flexible and efficient SCPC modems. Datum pioneered use of advanced LDPC coding in SCPC to simultaneously achieve high spectral efficiency and configuration granularity. The PSM-500 series of Datum IF and L-band SCPC modems offer high versatility and performance, allowing […]

January 17, 2013 | By | 1,471 Replies More
Calculate SCPC Savings in 5 Simple Steps

Calculate SCPC Savings in 5 Simple Steps

Calculating satellite capacity savings when considering two options of SCPC modems can be done in two ways: Link Budgets (LBs): Redo link budgets based on the new modem performance curves. The new LBs will allow the comparison of scenarios “A” and “B”. Comparison Calculator: A very close approximation can be obtained quickly without redoing LBs. […]

January 16, 2013 | By | 4,568 Replies More