TVStudy Update No. 3 Does Cross-Border Analysis
Channel-interference software goes international
August 20, 2013
Regulators have yet again updated
, the analysis software that the Federal Communications
Commission will use to repack TV stations into the spectrum left over after
next year’s incentive auction.
1.2.7 is said to be able to perform cross-border channel analysis of TV signal
interference between stations in the United States and those in Canada and
Mexico “on proxy channels.”
is based on Bulletin OET-69
from the FCC’s Office of Engineering and Technology. OET-69 describes the
methodology for calculating TV station coverage areas in order to anticipate
and prevent interference. The accuracy of the software will be crucial when TV
stations are assigned new frequencies after the auction because there will be
fewer channel choices. Placing stations on the same channel in adjacent
markets—U.S. or otherwise—could eliminate reception for some households.
Vers. 1.2.7 includes a number of tweaks over the previous release, Vers. 1.2
(now dubbed 1.2.6) which was rolled out in July and included the capacity to replicate
multiple station signals simultaneously to yield a nationwide coverage
snapshot. It also introduced the ability to generate “pairwise” data files for
making definitive determinations on U.S. station-to-station interference based
on reception by “the same specific viewers for each eligible station.”
Vers. 1.2.7 includes a new pairwise study setup option that includes not just
U.S. stations, but a “choice for all countries,” according to the
“Stations in the selected country are replicated
to each study channel then paired with stations from all countries, replicated
to appropriate channel relationships, to determine constraints for channel
repacking of stations in the selected country,” it states.
The new version also has redesigned logic that overcomes potential errors
arising from “complex situations involving multiple stations with conflicting
records,” the Change Log says. A bug that caused out-of-memory and SQL key errors
also was fixed, as was another related to the distance calculator. The name
format used for SQL databases was changed to “reduce the risk of conflict with
other applications sharing the same database server,” and the presentation of
station search results was refined.
None of the underlying data files will need to be replaced.
TVStudy Vers. 1.2.7 was released just
two days before the commission’s previously announced instructional webinar on the
software’s use. The webinar is scheduled for Thursday, Aug. 22, from 1 to 3
p.m. Eastern Time. It will be hosted by the FCC’s Incentive Auction Task Force “for
parties interested in learning more about the technical details of the recently
released repacking software, data and output files,” according to the
commission. The software and related files are available for download from the
FCC’s Repacking website.
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