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OTA Reception Files
Downloadable Files re On-The-Air Reception - by holl_ands

Includes DTV Antenna Specs (and measured Performance), measured Balun Loss, measured RF Splitter Loss & RG-6 Cable Loss Specs.

Also includes ATSC/NTSC Tuner Specs and Preamp Specs, plus a DTV Signal Overload Calculator and a Third Order Intermod Calculator.

UPDATE (24Mar2009): Updated DTV Interference Calculator Rev C.

UPDATE (26Mar2010): Added CECB Features List - mod 26Mar2010.

UPDATE (14Aut2011): Updated DTV Interference Calculator - Rev F.

UPDATE (12Sep2011): Updated DTV Preamp Signal Overload Calculator - Rev L to add VHF specific calculations.

UPDATE (25Sep2011): Updated "Preamp Comparison Chart - Rev A", due to W-G change to HDP-269 Max Input Spec.

UPDATE (13Mar2012): Updated "DTV Preamp Signal Level Overload Calculation - Rev M".
Fixed typo in W-G specs for 19 dB Gain Preamps - 99.4 dBuV vice 89.5 dBuV.  Calculations not affected.

UPDATE (21Nov2012): Added five Spread Sheets (*.xls or *.xlsx) with Raw Data from various 4nec2 runs
that were used to prepare the Antenna Performance Charts used throughout this website.
If marked with one or more X's, the data has either been superseded by an alternative run and/or it
might have an unspecified PROBLEM...so ignore it.

UPDATE (1May2013): In my Modification to solidsignal's Preamp Comparison Chart, corrected AP-2870 Max Input to reflect (29Jan2010) update to Winegard Preamp specs.

UPDATE (10May2013): Added Interior Photos of Winegard AP-8700 and HDP-269 Preamps.

UPDATE (25Jul2013): Updated "DTV Preamp Signal Level Overload Calculation - Rev N" to reflect new W-G LNA200's ASSUMED 20 dB improvement in UHF Max Input compared to AP8700.

UPDATE (20Nov2013): Added Chart showing RS 15-00396 4G_LTE Low Pass Filter Loss.

UPDATE (19Apr2018): Added Charts showing Measured Insertion Loss for various Ferrite and PCB Baluns.
Date(s): 3 Feb 2009. Album by holl_ands. 1 - 35 of 35 Total. 16616 Visits.
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Enlarge Microsoft Excel Spreadsheet 1
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DTV Antennas Rev E
Compare Manufacturer Specs & Tested Performance

Enlarge Microsoft Excel Spreadsheet 2
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Balun Loss using TWC-SD Freqs - Rev B

Enlarge Microsoft Excel Spreadsheet 3
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RF Splitter/Combiner Loss - Rev B

Enlarge Microsoft Excel Spreadsheet 4
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Belden RG-6 & RG-11 Cable Loss Specs

Enlarge photo 5
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Belden RG-59, RG-6 & RG-11 Coax Loss Chart

Enlarge Microsoft Excel Spreadsheet 6
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ATSC & NTSC Tuner Module Specs

Enlarge Microsoft Excel Spreadsheet 7
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CECB Feature List - mod 26Mar2010.xls

Enlarge Microsoft Excel Spreadsheet 8
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COMPARE System Noise Figures
With and Without Preamps

Enlarge Microsoft Excel Spreadsheet 9
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DTV Preamp Signal Overload Calculator - Rev M

Calculate Max Input Signal to Maximize
SFDR (Spurious Free Dynamic Range).

Enlarge Microsoft Excel Spreadsheet 10
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DTV Interference Calculator - Rev G

Enter up to five channels to see which
channels are affected by (3 channel wide)
Third Order Intermods.

Strong channels also block weak adjacent channels

Enlarge photo 11
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Preamp Performance Summary
Measurements by Calaveras - posted 28Nov2015

Presumably for Two Strong Input Signals.
Max Signal Input and Output
would need to be DERATED:
3 Signals: -3.6 dB
4 Signals: -5 dB
5 Signals: -6 dB
6 Signals: -7 dB
8 Signals: -8 dB
Ignore signals more than 6 dB below the Strongest.

Enlarge Microsoft Word Document 12
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Modified www.solidsignal.com Chart Comparing Preamps - RevB

Added columns listing Max Input Signal for
Maximized SFDR (Spurious Free Dynamic Range).

RevA: W-G revised HDP-269 Max Input Spec
from 350,000 to 150,000 uV.

RevB: Changed back to HDP-269 max Input Spec of 350,000 uV and corrected AP-2870 per 110,000 uV vice old spec value of 10,000 uV.

Enlarge Microsoft Excel Spreadsheet 13
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Old Preamp Specs - Rev B

Enlarge Microsoft Excel Spreadsheet 14
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UHF Antenna 4nec2 Sim Charts RevJ.xls

Enlarge Microsoft Excel Spreadsheet 15
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Hi-VHF Antenna 4nec2 Sim Charts RevI.xls

Enlarge Microsoft Excel Spreadsheet 16
enlarge 2.62MB, 791x1024
UHF_HiVHF_STACKED Antenna 4nec2 Sim Charts - RevG.xls

Enlarge Microsoft Excel Spreadsheet 17
enlarge 337KB, 791x1024
Winegard YA-1713 4nec2 Sim Charts.xls

Enlarge Microsoft Excel Spreadsheet 18
enlarge 379KB, 791x1024
Hi-VHF Yagi vs Zig-Zag Performance Curves - holl_ands RevD.xlsx

Enlarge photo 19
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Channel Master SPARTAN Preamp Circuit Board

Enlarge photo 20
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Channel Master SPARTAN Preamp - Reverse

Enlarge photo 21
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Winegard AP-8700 Preamp
Top of Circuit Board

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Winegard AP-8700 Preamp
Bottom of Circuit Board

Enlarge photo 23
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Winegard HDP-269 Preamp
Top of Circuit Board

Enlarge photo 24
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Winegard HDP-269 Preamp
Bottom of Circuit Board

Enlarge photo 25
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Original CM7777 Preamp
Bottom of Circuit Board

Enlarge photo 26
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Original CM7777 Preamp
Top of Circuit Board

Enlarge photo 27
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Original CM7777 Preamp
VHF/UHF Selector Switch Detail

Enlarge photo 28
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PS-0747 Power Insertion Module Schematic
for Original CM7777 and Spartan Preamps

Posted by rabbit73

Enlarge PDF 29
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Digital Planet 2-Port RF Splitter/Combiner
Loss Measurements [26Nov2004]
Using Cable Box Diagnostic Display
as a Signal Level "Meter" [+/- 0.5 dB]

Enlarge photo 30
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RS 15-00396 4G_LTE Low Pass Filter Loss
Posted by ADTech, 27Nov2013

Note Significant Loss on Higher Channels,
Do NOT use unless you are SURE you NEED it.

Enlarge PDF 31
enlarge 76KB, 1024x791
Philips Ferrite Outdoor Balun Loss:
UHF: 0.5 to 0.9 dB (470-698 MHz)
Hi-VHF: Under 0.6 dB, Lo-VHF: Under 0.7 dB

Measurements by Johnrmckee (18Feb2009)

Enlarge photo 32
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Ferrite Balun Insertion Loss
Used in older A-D 91XG Antennas
Loss for TWO Back-to-Back Units:
1.15 to 1.7 dB each (470-698 MHz)

Measurements by Calaveras

Enlarge photo 33
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Ferrite Balun Loss Comparisons
Loss for TWO Back-to-Back Units:
CM94444 Outdoor Balun Loss:
UHF: ~1.2 dB
Hi-VHF: ~1.0 dB
Lo-VHF: ~0.4 dB

Measurements by ADTech

Enlarge photo 34
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UP2A PCB Balun Loss
Used in A-D UHF C2 and C4 Antennas
Loss for TWO Back-to-Back Units:
0.6 to 0.9 dB each (470-698 MHz)

Measurements by ADTech

Enlarge photo 35
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UP2A-6 PCB Balun Loss Variation
Used in A-D Hi-VHF C5 Antenna
Loss for TWO Back-to-Back Units

Measurements by ADTech

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  Sign the Guestbook. Displaying 2 of 2 entries.
Great stuff!
Brian Hudgins, Thu, 27 Nov 2014 2:41PM
Fascinating collection of valuable information & tools for those of us RF EE challenged. Very much appreciated.
Pete Higgins, Wed, 27 Mar 2013 10:10PM