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 <<O>>  Difference Topic RFIReportsTable (r1.14 - 24 Jan 2008 - FrankGhigo)
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2320-2345 S Band Sig Ch AZ EL existing Det From Source ID LOC COMMENTS
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2320-2345 S Band Sig Ch AZ EL existing Det From Sirius/XM Satellite radio Sirius and XM satellites Very strong RFI: avoid this band at all costs!

 <<O>>  Difference Topic RFIReportsTable (r1.13 - 29 Sep 2006 - CarlaBeaudet)
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460.3 PF1-450 SigCh AZ EL potential DetFrom?? WPEH291 Elliott Knob, VA Augusta Co.
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460.3 PF1-450 Sig Ch AZ EL potential Det From WPEH291 Elliott Knob, VA Augusta Co.
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945.00 PF2 AM Studio to Tx link as seen from AZ 142.8 EL 30.54 9/27/06 GBT WHY402 SourceID945 Carter's Mtn (outside NRQZ) Confirmed via on/off 9/28/06
947.00 PF2 AM Studio to Tx link as seen from AZ 142.8 EL 30.54 9/27/06 GBT WVMR Horse Ridge Tx Confirmed via AM demod on 9/28/06; Working w/engineer to mitigate
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FREQ RxBand SigCh AZ EL DATE DetFrom?? SourceID LOC COMMENTS
FREQ RxBand SigCh AZ EL DATE DetFrom?? SourceID LOC COMMENTS
FREQ RxBand SigCh AZ EL DATE DetFrom?? SourceID LOC COMMENTS
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FREQ RxBand Sig Ch AZ EL DATE Det From Source ID LOC COMMENTS
FREQ RxBand Sig Ch AZ EL DATE Det From Source ID LOC COMMENTS
FREQ RxBand Sig Ch AZ EL DATE Det From Source ID LOC COMMENTS

 <<O>>  Difference Topic RFIReportsTable (r1.12 - 19 Jul 2006 - CarlaBeaudet)
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%META:TOPICPARENT{name="RfiImprovements"}%

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%META:TOPICPARENT{name="Electronics.RfiGroup"}%


 <<O>>  Difference Topic RFIReportsTable (r1.11 - 18 Jul 2006 - WesleySizemore)
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171.525 RxBand SigCh 180   Existing   Monitoring Station   U. S. Forest Service, Bald Knob, VA

 <<O>>  Difference Topic RFIReportsTable (r1.10 - 07 Apr 2006 - CarlaBeaudet)
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2200 S Band SigCh AZ EL 4/4/06 GBT SourceID LOC T. Minter
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2200 S Band SigCh AZ EL 4/4/06 GBT SourceID LOC T. Minter ISS satelite?

 <<O>>  Difference Topic RFIReportsTable (r1.9 - 05 Apr 2006 - CarlaBeaudet)
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2200 S Band SigCh AZ EL 4/4/06 GBT SourceID LOC T. Minter
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5440 C Band CW AZ EL 3/13/06 GBT, Mon.Sta Satellite? LOC http://wiki.gb.nrao.edu/bin/view/Electronics/CbandReceiver http://www.aoc.nrao.edu/evla/geninfo/memoseries/evlamemo54.pdf

 <<O>>  Difference Topic RFIReportsTable (r1.8 - 10 Jan 2006 - CarlaBeaudet)
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322.56 PF1-340   AZ EL Cycle7 2005 Mobile RFI search GBT Air Handler Controller NRAO Controller will be replaced; check PF1-340 after replacement
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322.56 PF1-340 continuously present AZ EL Cycle7 2005 Mobile RFI search GBT Air Handler Controller NRAO Controller will be replaced; check PF1-340 after replacement

 <<O>>  Difference Topic RFIReportsTable (r1.7 - 10 Jan 2006 - CarlaBeaudet)
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280-390 PF1-340 2 MHz comb AZ EL 5/1/03 GBT GBT Active Surface   If present, power active surface off
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280-390 PF1-340 2 MHz comb AZ EL 5/1/03 GBT GBT Active Surface   If present, power active surface off; cage hardware to be replaced in Feb 06
322.56 PF1-340   AZ EL Cycle7 2005 Mobile RFI search GBT Air Handler Controller NRAO Controller will be replaced; check PF1-340 after replacement
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-- DeniseWirt - 24 Feb 2005


 <<O>>  Difference Topic RFIReportsTable (r1.6 - 04 May 2005 - DeniseWirt)
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  PF1-800 SigCh AZ EL 3/5/05 GBT SourceID LOC On many occasions, there is a birdie at ~ 28.76 Hz fluctuation frequency within the 800 MHz band that is VERY strong

 <<O>>  Difference Topic RFIReportsTable (r1.5 - 18 Apr 2005 - DeniseWirt)
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444.175 PF1-450 intermittent spike AZ EL 4/9/05 GBT     Strongest in the West; not detected in the Southeast

 <<O>>  Difference Topic RFIReportsTable (r1.4 - 25 Mar 2005 - DeniseWirt)
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835+/-1 PF1-800 SigCh AZ EL 3/25/05 GBT     824-849 MHz is allocated to mobile cellular telephone

 <<O>>  Difference Topic RFIReportsTable (r1.3 - 09 Mar 2005 - DeniseWirt)
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163.25 RxBand SigCh AZ EL existing Monitoring Station   Medical Radiocommunication; various sites outside NRQZ  

 <<O>>  Difference Topic RFIReportsTable (r1.2 - 25 Feb 2005 - DeniseWirt)
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Contact WesleySizemore to report RFI

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Sky Frequency (MHz) GBT Receiver Band Signal Characteristics GBT Azimuth GBT Elevation Date Reported Detected From Source Identification Source Location Comments
155.295 RxBand SigCh AZ EL existing   Pocahontas County Emerg. Svc.   Waiver granted; Infrequent activity, but very strong
155.34 RxBand SigCh AZ EL existing   Pocahontas County Emerg. Svc.   Waiver granted; Infrequent activity, but very strong
155.4 RxBand SigCh AZ EL existing   Pocahontas County Emerg. Svc.   Waiver granted; Infrequent activity, but very strong
155.595 RxBand SigCh AZ EL existing   Pocahontas County Emerg. Svc.   Waiver granted; Infrequent activity, but very strong
155.97 RxBand SigCh AZ EL existing   Pocahontas County Emerg. Svc.   Waiver granted; Infrequent activity, but very strong
162.400 RxBand SigCh AZ EL existing   NOAA Weather Radio    
162.425 RxBand SigCh AZ EL existing   NOAA Weather Radio    
162.475 RxBand SigCh AZ EL existing   NOAA Weather Radio    
162.500 RxBand SigCh AZ EL existing   NOAA Weather Radio    
162.525 RxBand SigCh AZ EL existing   NOAA Weather Radio    
162.550 RxBand SigCh AZ EL existing   NOAA Weather Radio    
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Sky Frequency (MHz) GBT Receiver Band Signal Characteristics GBT Azimuth GBT Elevation Date Reported Detected From Source Identification Source Location Comments
155.295 RxBand 20K0F3E (207w ERP) AZ EL existing   Pocahontas Co. E911 Snowshoe, WV Waiver granted; Infrequent activity, but very strong
155.34 RxBand (45w,100w) AZ EL existing   Pocahontas Co. E911 Snowshoe & Durbin, WV Waiver granted; Infrequent activity, but very strong
155.4? RxBand SigCh AZ EL existing   Pocahontas County Emerg. Svc.   Waiver granted; Infrequent activity, but very strong
155.595 RxBand (45w ERP) AZ EL existing   Pocahontas Co. E911 Snowshoe, WV Waiver granted; Infrequent activity, but very strong
155.97 RxBand (45w ERP) AZ EL existing   Pocahontas Co. E911 Snowshoe, WV Waiver granted; Infrequent activity, but very strong
162.400 RxBand SigCh AZ EL existing   NOAA Weather Radio    
162.425 RxBand SigCh AZ EL existing   NOAA Weather Radio    
162.450 RxBand SigCh AZ EL existing   NOAA Weather Radio    
162.425 RxBand SigCh AZ EL existing   NOAA Weather Radio    
162.500 RxBand SigCh AZ EL existing   NOAA Weather Radio    
162.525 RxBand SigCh AZ EL existing   NOAA Weather Radio    
162.550 RxBand SigCh AZ EL existing   NOAA Weather Radio    
169.425 RxBand SigCh AZ EL existing   AFWS IFLOWS network various WV TX's Active during rain
169.475 RxBand SigCh AZ EL existing   AFWS IFLOWS network various WV TX's Active during rain
169.500 RxBand SigCh AZ EL existing   AFWS IFLOWS network various WV TX's Active during rain
169.525 RxBand SigCh AZ EL existing   AFWS IFLOWS network various WV TX's Active during rain
170.325 RxBand SigCh AZ EL existing   AFWS IFLOWS network various WV TX's Active during rain
171.0375 RxBand SigCh AZ EL existing   AFWS IFLOWS network various WV TX's Active during rain
171.825 RxBand SigCh AZ EL existing   AFWS IFLOWS network various WV TX's Active during rain
171.875 RxBand SigCh AZ EL existing   AFWS IFLOWS network various WV TX's Active during rain
280-390 PF1-340 2 MHz comb AZ EL 5/1/03 GBT GBT Active Surface   If present, power active surface off
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406.125 PF1-450 SigCh AZ EL existing   AFWS IFLOWS network    
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432.305 PF1-450 SigCh 146.9 EL 10/19/03 GBT Gene Wood, WA4PGI Bald Knob, Bath Co. VA Gene agrees to shutdown per amateur agreement at request of NRAO - Contact Denise Wirt at x2107
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432.305 PF1-450 CW 146.9 EL 10/19/03 GBT Gene Wood, WA4PGI Bald Knob, Bath Co. VA Gene agrees to shutdown per amateur agreement at request of NRAO - Contact Denise Wirt at x2107
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471.75? PF1-450 SigCh AZ EL existing GBT Ch. 15 Roanoke, VA analog TV station
477.25 PF1-450 SigCh AZ EL 10/15/03 DetFrom?? UHF TV LOC COMMENTS
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471.25-801.25 PF1-450, PF1-800 SigCh AZ EL existing GBT UHF TV   See CATV TV Frequency guide. Report CATV to WesleySizemore.
481.75, 483.25 PF1-450 Strong AZ EL 3/5/04 GBT TV LOC Reported by observer on Observer comments
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~710 PF1-800 outbursts, broadband (digital?) AZ EL 1/28/04 GBT     Observer reported several outbursts of broad band (digital?) RFI near 710 MHz
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894-896 PF1-800 SigCh AZ EL existing GBT Airphones   Always present
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1256, 1292 L Band SigCh AZ EL existing DetFrom? Bedford radar Bedford, VA COMMENTS
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1256, 1292 L Band SigCh AZ EL existing GBT Bedford radar Bedford, VA See R. Fisher's Analysis of Radar Data from February 6, 2001
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1415 L Band 5 MHz birdie AZ EL 4/5/03 GBT     Observer reported consistent 5 MHz birdie
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12000-12700 Ku Band SigCh 90 to 270 <40 </td> 4/20/04 GBT SourceID LOC Satellite TV transmission
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12000-12700 Ku Band SigCh 90 to 270 <40 4/20/04 GBT SourceID LOC Satellite TV transmission

 <<O>>  Difference Topic RFIReportsTable (r1.1 - 24 Feb 2005 - DeniseWirt)
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%META:TOPICINFO{author="DeniseWirt" date="1109273520" format="1.0" version="1.1"}% %META:TOPICPARENT{name="RfiImprovements"}% Table of Known RFI

Sky Frequency (MHz) GBT Receiver Band Signal Characteristics GBT Azimuth GBT Elevation Date Reported Detected From Source Identification Source Location Comments
155.295 RxBand SigCh AZ EL existing   Pocahontas County Emerg. Svc.   Waiver granted; Infrequent activity, but very strong
155.34 RxBand SigCh AZ EL existing   Pocahontas County Emerg. Svc.   Waiver granted; Infrequent activity, but very strong
155.4 RxBand SigCh AZ EL existing   Pocahontas County Emerg. Svc.   Waiver granted; Infrequent activity, but very strong
155.595 RxBand SigCh AZ EL existing   Pocahontas County Emerg. Svc.   Waiver granted; Infrequent activity, but very strong
155.97 RxBand SigCh AZ EL existing   Pocahontas County Emerg. Svc.   Waiver granted; Infrequent activity, but very strong
162.400 RxBand SigCh AZ EL existing   NOAA Weather Radio    
162.425 RxBand SigCh AZ EL existing   NOAA Weather Radio    
162.475 RxBand SigCh AZ EL existing   NOAA Weather Radio    
162.500 RxBand SigCh AZ EL existing   NOAA Weather Radio    
162.525 RxBand SigCh AZ EL existing   NOAA Weather Radio    
162.550 RxBand SigCh AZ EL existing   NOAA Weather Radio    
324.7 PF1-340 44dB over continuum limit per Anechoic chamber AZ EL 7/15/03 Mobile RFI search Doorbell Harold Crist, Arbovale COMMENTS
327-332 PF1-340 SigCh AZ EL 1/30/04 Mobile RFI search SourceID Rabbit Patch house #4 COMMENTS
332.6 PF1-340 SigCh AZ EL 9/4/03 GBT SourceID LOC likely FAA
353.9 PF1-340 SigCh AZ EL 6/3/03 GBT SourceID LOC FAA air to ground comm; possible tx at Buena Vista VA
400.1 PF1-450 narrowband UHF CW beacon - always present AZ EL 10/15/03 GBT Orbcomm LOC Satellite timing signal
408.715 PF1-450 SigCh AZ EL 10/30/03 GBT SourceID LOC Jeff Millman's plot 18C
408.77 PF1-450 SigCh AZ EL 10/30/03 GBT SourceID LOC Jeff Millman's plot 18C
409.675 PF1-450 0.01 MHz BW 226.1 EL 10/15/2003 GBT IFLOWS Repeater Keeney Mtn near Alderson, WV (outside NRQZ) In RA band; found during PF450 scan; Ref US13 footnotes; On Oct 21, this site restored to a 25w store&forward
422.8 PF1-450 SigCh AZ EL 10/19/03 GBT SourceID LOC COMMENTS
430.05 PF1-450 SigCh AZ EL 8/6/04 GBT SourceID LOC COMMENTS
432.305 PF1-450 SigCh 146.9 EL 10/19/03 GBT Gene Wood, WA4PGI Bald Knob, Bath Co. VA Gene agrees to shutdown per amateur agreement at request of NRAO - Contact Denise Wirt at x2107
432-434 PF1-450 SigCh AZ EL 10/19/03 GBT SourceID LOC COMMENTS
443-446 PF1-450 SigCh AZ EL 10/19/03 GBT SourceID LOC COMMENTS
451.025 PF1-450 SigCh AZ EL potential DetFrom? KDA670 Elliott Knob, VA Augusta Co.
451.075 PF1-450 SigCh AZ EL potential DetFrom? KDA670 Elliott Knob, VA Augusta Co.
453.75 PF1-450 SigCh AZ EL 2/22/05 Monitoring Station WNMW815 Elliott Knob, VA Augusta Co.
453.925 PF1-450 SigCh AZ EL 2/23/05 Monitoring Station WPMQ964 Elliott Knob, VA Augusta Co.
460.3 PF1-450 SigCh AZ EL potential DetFrom?? WPEH291 Elliott Knob, VA Augusta Co.
460.4 PF1-450 SigCh AZ EL 2/22/05 Monitoring Station KNFY393 Elliott Knob, VA Augusta Co.
460.55 PF1-450 SigCh AZ EL potential DetFrom? WPKQ976 Elliott Knob, VA Augusta Co.
462.875 PF1-450 SigCh 225.9 EL 1/3/04 Monitoring Station Black Bear Paging Keeney Mtn. near Alderson, WV (outside NRQZ) Most active during normal waking hours
471.25? PF1-450 SigCh AZ EL existing GBT Ch. 15 Roanoke, VA analog TV station
471.75? PF1-450 SigCh AZ EL existing GBT Ch. 15 Roanoke, VA analog TV station
477.25 PF1-450 SigCh AZ EL 10/15/03 DetFrom?? UHF TV LOC COMMENTS
500-506 PF1-450 entire band AZ EL existing GBT digital TV Roanoke, VA COMMENTS
741.25 PF1-800 SigCh AZ EL 2/25/04 DetFrom? W59AC TV New Market, VA (outside NRQZ) COMMENTS
745.75 PF1-800 SigCh AZ EL 2/25/04 DetFrom? W59AC TV New Market, VA (outside NRQZ) COMMENTS
858.2875 PF1-800 SigCh 149.7 EL 9/25/03 Monitoring Station AEP Tobacco Row Mtn. voice detected
879.69 PF1-800 SigCh AZ EL 9/25/03 Monitoring Station Highland Cellular Alta/Sam Black (outside NRQZ) Cell. ctrl ch 323
879.87 PF1-800 SigCh AZ EL 9/25/03 Monitoring Station Highland Cellular Muddy Creek Mtn (outside NRQZ) Cell. ctrl ch 329
880.26 PF1-800 SigCh 219.8 EL 9/25/03 Monitoring Station US Cellular Muddy Creek Mtn Cell. ctrl ch 342
902-1240 PF2, L Band SigCh AZ EL 4/5/04 Monitoring Station SourceID LOC See Spectrum Summary
1256, 1292 L Band SigCh AZ EL existing DetFrom? Bedford radar Bedford, VA COMMENTS
1227.6 L Band SigCh AZ EL existing DetFrom? GPS transmitter LOC COMMENTS
1575.42 L Band SigCh AZ EL existing DetFrom? GPS transmitter LOC COMMENTS
2320-2345 S Band SigCh AZ EL existing DetFrom? SourceID LOC COMMENTS
8850.7 X Band SigCh AZ EL 9/24/03 GBT SourceID LOC COMMENTS
8854 X Band SigCh AZ EL 9/24/03 GBT SourceID LOC COMMENTS
8904 X Band SigCh AZ EL 9/24/03 GBT SourceID LOC COMMENTS
8914.3 X Band SigCh AZ EL 9/24/03 GBT SourceID LOC COMMENTS
8953.3 X Band SigCh AZ EL 9/24/03 GBT SourceID LOC COMMENTS
8957.8 X Band SigCh AZ EL 9/24/03 GBT SourceID LOC COMMENTS
9026.6 X Band SigCh AZ EL 9/24/03 GBT SourceID LOC COMMENTS
9054.5 X Band SigCh 0 38 9/24/03 GBT SourceID LOC Around 19:30 ET (burst of RFI)
9105.8 X Band SigCh 300.4 77.85 9/24/03 DetFrom? SourceID LOC Around 17:30 ET
9107.1 X Band SigCh AZ EL 9/24/03 GBT SourceID LOC Strongest signal
9186.9 X Band SigCh 182 34 9/24/03 GBT SourceID LOC Around 01:30 ET
9840 X Band 20 MHz BW 80 30 10/9/03 GBT SourceID LOC 90 second burst; present approx 15 minutes continually until 18:00, 10/7/03
12000-12700 Ku Band SigCh 90 to 270 <40 </td> 4/20/04 GBT SourceID LOC Satellite TV transmission
17700-20200 K Band SigCh AZ EL 11/2/04 GBT SourceID LOC See Spectrum Summary
FREQ RxBand SigCh AZ EL DATE DetFrom?? SourceID LOC COMMENTS
FREQ RxBand SigCh AZ EL DATE DetFrom?? SourceID LOC COMMENTS
FREQ RxBand SigCh AZ EL DATE DetFrom?? SourceID LOC COMMENTS

-- DeniseWirt - 24 Feb 2005


Topic RFIReportsTable . { View | Diffs | r1.14 | > | r1.13 | > | r1.12 | More }
Revision r1.1 - 24 Feb 2005 - 19:32 GMT - DeniseWirt
Revision r1.14 - 24 Jan 2008 - 18:42 GMT - FrankGhigo 		Content copyright © 1999-2007 by the contributing authors.
All material on this collaboration platform is the property of the contributing authors.