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Doug Smith (W9WI) comments on incorrect PSIP program dataDoug Smith is a professional TV engineer and a DXer. His comments are from the Worldwide TV-FM DX Association wtfda e-mail list. Thanks to Doug and WTFDA. "The Program Map Table (which includes the PSIP ID) is transmitted a lot
more often than the MGT. (which includes the program guide) Video
frames aren't sent as often as the PMT but a lot more often than the
MGT. I think that would correlate with your observation -- the KTBS
program guide information would remain in memory and would be displayed
for any station whose Major Channel Number is 3, until overwritten by
guide information transmitted by some other "channel 3" station. (I'm in the interesting situation of having my STB believe channels 5-1 and 5-2 are RF channel 56 - the two subchannels of WTVF - while 5-3 is WMC-52's implementation of the NBC weather channel...)" Doug maintains a complete, up-to-date list of TV stations (including DTVs). |
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KVBC-DT-2 Las Vegas received via Es in north Louisiana Program and System Information Protocol data (PSIP) received via Es on May 13, 2005; May 20, 2005; May 26, 2005; June 17, 2005; July 25, 2006; July 12, 2007 Video decoded via Es on May 29, 2005; December 21, 2005; July 14, 2006; February 8, 2007; May 14, 2008 Distance at my location in Shreveport, Louisiana: 1238 miles Date: May 13, 2005 Time: 2015 Central Daylight Time DTV receiver: USDigital DB-2010 STB (from WalMart), connected to a RCA CRF900 RF modulator (from the Home Depot), Emerson VCR, RCA 13 inch TV. Antenna: Winegard Chromstar CA-5254 VHF-only (sixteen foot long boom) at 18 feet above ground level. Equipment used for analog reception of KNAZ-2 Flagstaff AZ and DTV snow: Panasonic VCR, Sanyo 13 inch TV, Finco Y10-2 ten-element channel 2 yagi (thirteen foot long boom) at 11 feet above ground level.
Step 1: Snow is mixing with KNAZ-2 Flagstaff.
Step 2: KNAZ-2 is covered by snow.
Step 3: The DTV receiver has successfully scanned for KVBC-DT-2.
Step 4: KVBC-DT has been added to the receiver's channel list.
Step 5: The message that KVBC is "currently off the air" actually means that the
stations's signal is too weak to decode (produce a picture).Date: May 29, 2005 Time: 1330 Central Daylight Time DTV receiver: USDigital DB-2010 STB (from WalMart), connected to a RCA CRF900 RF modulator (from the Home Depot), Emerson VCR, RCA 13 inch TV. Antenna:Finco Y10-2 ten-element channel 2 yagi (thirteen foot long boom) at 11 feet above ground level.
This is the last frame (frozen) of a couple of seconds of video from May 29, 2005. While this is not a perfect frame, it was preceeded by several perfect frames.
(Photograph published in VUD, 10/2005.)
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WKYC-DT-2 Cleveland received via Es in north Louisiana
Program and System Information Protocol data (PSIP) and video received via Es on August 9, 2005; June 2, 2008
Program and System Information Protocol data (PSIP) received via Es on January 8, 2008
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KOTA-DT-2 Rapid City SD received via Es in north Louisiana Program and System Information Protocol data (PSIP) received via Es on May 16, 2007 Distance at my location in Shreveport, Louisiana: 949 miles, which is average Es DTV receiver: RCA ATSC-11, connected to a RCA CRF900 RF modulator (from the Home Depot), Sanyo VCR, RCA 13 inch TV. Antenna: Winegard Chromstar CA-5254 VHF-only (sixteen foot long boom) at 18 feet above ground level. |