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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 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If marked with one or more X's, the data has either been superseded by an alternative run and/or it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.
Date(s): 3 Feb 2009. Album by holl_ands. 1 - 31 of 31 Total. 12252 Visits.
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Enlarge Microsoft Excel Spreadsheet 1
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XLS1
DTV Antennas Rev E
Compare Manufacturer Specs & Tested Performance


Enlarge Microsoft Excel Spreadsheet 2
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XLS2
Balun Loss using TWC-SD Freqs - Rev B

Enlarge Microsoft Excel Spreadsheet 3
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XLS3
RF Splitter/Combiner Loss - Rev B

Enlarge Microsoft Excel Spreadsheet 4
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XLS4
Belden RG-6 & RG-11 Cable Loss Specs

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

Enlarge Microsoft Excel Spreadsheet 6
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XLS6
ATSC & NTSC Tuner Module Specs

Enlarge Microsoft Excel Spreadsheet 7
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XLS7
CECB Feature List - mod 26Mar2010.xls

Enlarge Microsoft Excel Spreadsheet 8
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XLS8
COMPARE System Noise Figures
With and Without Preamps


Enlarge Microsoft Excel Spreadsheet 9
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XLS9
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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XLS10
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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11
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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DOC12
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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XLS13
Old Preamp Specs - Rev B

Enlarge Microsoft Excel Spreadsheet 14
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XLS14
UHF Antenna 4nec2 Sim Charts RevJ.xls

Enlarge Microsoft Excel Spreadsheet 15
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XLS15
Hi-VHF Antenna 4nec2 Sim Charts RevI.xls

Enlarge Microsoft Excel Spreadsheet 16
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XLS16
UHF_HiVHF_STACKED Antenna 4nec2 Sim Charts - RevG.xls

Enlarge Microsoft Excel Spreadsheet 17
enlarge 337KB, 791x1024
XLS17
Winegard YA-1713 4nec2 Sim Charts.xls

Enlarge Microsoft Excel Spreadsheet 18
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XLS18
Hi-VHF Yagi vs Zig-Zag Performance Curves - holl_ands RevD.xlsx

Enlarge photo 19
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19
Channel Master SPARTAN Preamp Circuit Board

Enlarge photo 20
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20
Channel Master SPARTAN Preamp - Reverse

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21
Winegard AP-8700 Preamp
Top of Circuit Board


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22
Winegard AP-8700 Preamp
Bottom of Circuit Board


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23
Winegard HDP-269 Preamp
Top of Circuit Board


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24
Winegard HDP-269 Preamp
Bottom of Circuit Board


Enlarge photo 25
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25
Original CM7777 Preamp
Bottom of Circuit Board


Enlarge photo 26
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26
Original CM7777 Preamp
Top of Circuit Board


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


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


Enlarge PDF 29
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PDF29
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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30
UP2A-6 Balun Insertion Loss Variation
Used in A-D Hi-VHF C5 Antenna
Loss for TWO Back-to-Back Units


Enlarge photo 31
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31
UP2A Balun Insertion Loss
Used in A-D UHF C2 and C4 Antennas
Loss for TWO Back-to-Back Units


 
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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