VLA EoR PROGRAM

RFI

Television channel-frequency allocations

Full FCC index of New Mexico broadcasters channels 8-11  

Full FCC index of Arizona broadcasters channels 8-11  

    New Mexico and Arizona with an overlay of channel numbers for television transmitters.
        (RED)            translators/repeaters
        (YELLOW)   analog TV
        (WHITE)       digital TV
    Symbol size indicates log10 broadcast power (316 kW max)

Broadcasters

Digital	Channel	Band (MHz)	Antenna Location	ERP (kW)
KOFT	8	180-186	Farmington, NM (36 dBu / 36 dBu contour) (Temp. Authority / Permit)	2.4/40
KNMD*	9	186-192	Scandia Crest,NM(36 dBu contour)	0.2
KCHF	10	192-198	Santa Fe/Jemez Pueblo, NM (36 dBu / 36 dBu contour) (Temp. Authority / Permit)	1.75/30
KPHZ	11	198-204	Holbrook, AZ(36 dBu contour)(Permit)	160
Analog
KOBR	8	180-186	Roswell/Tatum, NM(56 dBu contour)	316
KNMD*	9	186-192	Santa Fe/Jemez Pueblo, NM (56 dBu contour) (Permit)	316
KTSM	9	186-192	El Paso, TX (56 dBu contour)	316
KGUN	9	186-192	Tucson, AZ (56 dBu contour)	110
KCFG	9	186-192	Flagstaff, AZ (56 dBu contour) /56dBu contour) (Licensed/Permit)	1/316
KOVT	10	192-198	Silver City (56 dBu contour)	8.71
KBIM	10	192-198	Roswell/Lovington, NM (56 dBu contour)	316
KCHF	11	198-204	Santa Fe/Jemez Pueblo, NM (56 dBu contour)	316
KPHZ	11	198-204	Holbrook, AZ (56 dBu contour)	1.6

* educational broadcaster



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• Report on impact of HSync pulse transmission from broadcasters   06 July
• Wide-band cross-power sweep for RFI characterization   05 July 17 (zoom) 05 April 28
  (Scalar averages, 1-2 minute integration, 3 kHz channel spacing post Hanning)
  
  
• Wide-band cross-power sweep for RFI characterization in 185 MHz band observed with PRODUCTION receivers (06 Jan 07)
  Baseline 17-26
  Baseline 8-17
  Baseline 8-26
  
• Spectrum analyzer sweep at receiver output, antenna 8/26 Nov 05/Jan06
  • EOR science band with production receivers installed
    
  • Legacy science bands
    
  • P-band with production receivers installed
    
  
  
• Spectrum analyzer sweep at receiver output, antenna 6 (05 March 09, April 19)
  • Cumulative traces
    
  • Zoom for VHF
  • Referenced to TV allocations
  • Peak hold (30s accumulations)
  • Averages (1m integrations)
  • Serial averages overlayed. 1m integrations. STAGGERED in FREQUENCY.
  
  
• Wide-band TOTAL-power sweep for RFI characterization 05 March 10
  (1-2 minute averages, 6 kHz channel spacing post Hanning)



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2005 Apr 12

• A/C spectra above the TV band. nonTV RFI variabiltiy does not confound the VLA front-end ALCs.
• Front-end ALC response demonstrating the effect of TV signals. FE 12.5 MHz filters exclude TV. 50 MHz filters include TV.