Terk Trinity indoor antenna - Canadian TV, Computing and Home Theatre Forums

Reply
 
LinkBack Thread Tools Search this Thread Display Modes

post #1 of 19 (permalink) Old 2017-10-13, 06:37 PM Thread Starter
 
Join Date: Mar 2009
Posts: 37
Terk Trinity indoor antenna

I've seen this indoor antenna advertised in a couple of places:

https://www.tomsguide.com/us/terk-tr...view-3211.html

It's a little different in terms of design, in that it has three little antennas pointing upwards.

Anyone have any experience with one of these? I see they're going for about $30, so I might just buy one and fool around with it. But, as always, I want to consult with the experts at Digital Home first, see if there's any information about it out there. (I've read some reviews in other places and people seem to like it alright.)

For the record I live in midtown Toronto (M4G postal code) and my third-floor living-room window faces west. Currently have a Terk HDTVa and it's pretty solid.
frisbeepilot is offline  
Sponsored Links
Advertisement
 
post #2 of 19 (permalink) Old 2017-10-14, 04:56 PM
Veteran
 
Join Date: Jun 2011
Location: 43░ N, 81.2░ W
Posts: 5,984
The Terk HDTVa is one of the better indoor antennas. It's based on a well proven design called a log periodic yagi antenna. I doubt the Terk Trinity will perform as well. The three dipoles it has are less directional and won't provide the same gain.
ExDilbert is offline  
post #3 of 19 (permalink) Old 2017-10-15, 10:06 AM
 
Join Date: Nov 2009
Posts: 513
The three dipoles are also vertical while the default polarization of US and Canadian broadcasts is horizontal. There is a substantial reception penalty when the reception elements are in the wrong plane for the incoming signals.

Looks more like another of Terk's marketing gimmicks than anything intended to actually work well.
ProjectSHO89 is offline  
 
post #4 of 19 (permalink) Old 2017-10-15, 04:25 PM
Veteran
 
Join Date: Jun 2011
Location: 43░ N, 81.2░ W
Posts: 5,984
The Terk Trinity looks more like a router than a TV antenna. Those are totally different techs with completely different hardware requirements. It will probably fool a lot of people though.
ExDilbert is offline  
post #5 of 19 (permalink) Old 2017-10-15, 06:06 PM
 
Join Date: May 2017
Posts: 37
It should work as good as a screw-driver inserted in antenna jack.

Reading reviews at websites - it really performs as predicted - receives as much as a screw-driver.

You pay $40 to hide screw-driver in a high-tech plastic look.



This $1 antenna will give at least 10 dB better SINR than those plastic vertical monopoles
Yurii Pylypenko is offline  
post #6 of 19 (permalink) Old 2017-10-15, 08:26 PM
Veteran
 
Join Date: Nov 2008
Location: San Diego, CA
Posts: 3,042
Terk Trinity ACTIVE Antenna only makes "sense" when you find out that it is the OTA-TV-Antenna (ONLY) spin-off of their other two OTA-TV-Antenna PLUS Wi-Fi Router products...with FIVE Vertical Monopole Antennas:
Terk : Indoor Antennas : TRINITYXTN
Terk : Indoor Antennas : WITRIAC
https://www.amazon.com/Trinity-Trimo.../dp/B01D0KIJRC [$11 at Amazon with FREE PRIME shipping]
BTW: At $11 price point ($40 MSRP) I conclude that there is NO WAY it includes "SMART" Adaptive Antenna Array processing, as LG mentioned MIGHT be in their MIMO capable Wi-Fi models (see below). However, their "Multimodal" description would be compatible with EACH Whip being connected to their own UHF, Hi-VHF or Lo-VHF Antenna Matching Network....so the only interaction between individual Antennas would be due ONLY to PASSIVE Mutual Inductance [i.e. Passive Reflector/Directors].


Of course, as mentioned above, since it's VERTICALLY POLARIZED, it may have LOTS OF LOSS trying to receive stations that do NOT broadcast with Circularly Polarized Antennas....and SOME LOSS for those that assign LOWER Power to the Vertical Component of the Elliptically Polarized signal [BTW: Multipath can have a BIG effect on Pol. signals]. See fol. lists for info re your area:
https://www.rabbitears.info/oddsande...ization&type=C [Circularly Pol.]
https://www.rabbitears.info/oddsande...ization&type=E [Elliptically Pol.]

==========================================
And I would speculate that Terk's next variation might INCLUDE an ATSC 3.0 TUNER(s) that rebroadcasts via Wi-Fi to compatible UDTV's and Handheld Devices, similar to LG's Dual Tuner Announcement...which INCLUDED "SMART" Adaptive Antenna Technology....perhaps for OTA and not just the usual MIMO for Wi-FI [which might be readily HACKED with EXTERNAL TV Antennas pointed in Different Directions]:
https://www.thebroadcastbridge.com/h...plained-part-1
NAB 2016: LG Demos ATSC 3.0 Wireless Network Antenna | TvTechnology


Antenna Simulations, Overload Calculations, etc: http://imageevent.com/holl_ands

Last edited by holl_ands; 2017-10-15 at 08:58 PM.
holl_ands is offline  
post #7 of 19 (permalink) Old 2017-10-15, 08:37 PM
 
Join Date: Oct 2008
Posts: 1,102
I had this antenna recommended by two different websites: https://www.amazon.ca/Channel-Master.../dp/B000BSKO84.

Any thoughts good or bad.
cyclist44 is offline  
post #9 of 19 (permalink) Old 2017-10-15, 11:33 PM
Veteran
 
Join Date: Jun 2011
Location: 43░ N, 81.2░ W
Posts: 5,984
The reviewers seem to like it when compared to other indoor antennas. I'd guess that's mostly due to it having a better than average amplifier. Still, the 60 mile range seems to be a bit exaggerated. Maybe that's line of sight to a mountain top transmitter though an open window but for most situations it's not realistic. The reviews seem to have mostly been done in urban areas with lots of strong signals, like NY. I'd like to have a NY-like TVFool report around here. I wonder how the 3 vertical elements on the Terk Trinity model compared to a GH.
ExDilbert is offline  
post #10 of 19 (permalink) Old 2017-10-15, 11:39 PM
Veteran
 
Join Date: Jun 2011
Location: 43░ N, 81.2░ W
Posts: 5,984
Quote:
I had this antenna recommended by two different websites: https://www.amazon.ca/Channel-Master.../dp/B000BSKO84.
Again, they are trying to compensate for lack of good antenna design by amplifying a bad antenna. It will work but not as well as a properly designed antenna that meets the requirements of the laws of physics. It's unrealistic to expect much more than reception of strong local signals with any antenna of this type. The fact that it can be mounted outside is a plus. Mounting it outside, above surrounding obstacles will provide better reception than placing it indoors.
ExDilbert is offline  
post #11 of 19 (permalink) Old 2017-10-16, 03:59 AM
 
Join Date: May 2017
Posts: 37
There is no way to adapt phase array for any price ($40 000 won't help), since this black box do not know frequency/lambda and do not know direction.
For phase array to work, you need to integrate full DVB-T2 receiver and somehow synchronize it with your TV set. When you select channel on TV, DVB-T2 tuner in antenna should switch to the same channel and adapt phase array to maximize SINR
P.S. Even $40 000 investment won't change polarization of vertical monopole to horizontal.
Yurii Pylypenko is offline  
post #12 of 19 (permalink) Old 2017-10-16, 01:07 PM
Veteran
 
Join Date: Jun 2011
Location: 43░ N, 81.2░ W
Posts: 5,984
I tend to agree. But maybe they spent $80,000 and found a way.
ExDilbert is offline  
post #13 of 19 (permalink) Old 2017-10-17, 06:12 AM
Veteran
 
Join Date: Nov 2008
Location: San Diego, CA
Posts: 3,042
Adaptive Antenna Array DVB-T Receivers in Europe (frequently incorporated into Mobile BUS/Limo/Van/Car TV's) integrates the two or four A/D Converters, Combiner and DVB-T Decoder function onto the SAME chip. [Combiner is typically Maximal Ratio Combiner (MRC) or less effective Equal Gain or perhaps inexpensive Switching Combiner]:
https://www.google.com/url?sa=t&rct=...Nndyo3gj0NY8mA
http://www.comm.utoronto.ca/~rsadve/...ityReceive.pdf

Adaptive Antenna Arrays operate with ARBITRARY Antenna Placement and phasing.....the Adaptive Algorithm adjusts amplitude and phase of multiple channels so that they are COHERENTLY Summed together (MRC Only), minimizing the Mean Square Error when comparing against KNOWN embedded SYNC signal within ATSC Waveforms.....very similar to how ATSC Waveform Adaptive Equalizer works.

LG ATSC 3.0 OTA Tuner and Wi-Fi Network Box MIGHT be employing this "MIMO" type approach if they simply adapted their multi-channel MIMO Wi-Fi Chip to ALSO provide "MIMO" type processing with ATSC waveforms....although provided details are very minimal.

BTW: Adaptive Antenna Array processing of ATSC 3.0 Signals would be VERY advantageous for SFN (Single Frequency Networks) where various stations us a DISTRIBUTED TRANSMITTER (DTx) System to improve Mobile/Handheld coverage, so that signals from a particular Channel are likely to come in from DIFFERENT Directions....AND is likely to be DIFFERENT for SOME Channels. [BTW: In looking at 1000's of TVFool Reports, MOST of us already have multiple Stations coming in from very different directions.]

Antenna Simulations, Overload Calculations, etc: http://imageevent.com/holl_ands

Last edited by holl_ands; 2017-10-17 at 06:38 AM.
holl_ands is offline  
post #14 of 19 (permalink) Old 2017-10-17, 09:35 AM
 
Join Date: May 2017
Posts: 37
Decoder/Receiver can easily support phase array, because it knows SINR and freq. It rotates phase angle until SINR reaches maximum.

Antenna with coax output cannot tune itself, because it doesn't know frequency. Your TV set has no output to inform antenna about user choice. It is not hard to integrate DVB-T2 tuner, SINR detector and phase-shifter into $40 antenna (Though still impossible to overcome supression of horizontal polarization signal via vertical monopole antenna).
It's impossible to modify your existing TV set to inform antenna on user choice.
Yurii Pylypenko is offline  
post #15 of 19 (permalink) Old 2017-10-17, 05:54 PM
Veteran
 
Join Date: Nov 2008
Location: San Diego, CA
Posts: 3,042
RF Tuner that Feeds DVB-T must be TOLD which RF Channel to tune to...i.e. USER R/C IR Code to Tuner/Wi-Fi STB with built-in Monopoles.

Although FIXED Matching Network for Lo-VHF, Hi-VHF and UHF Band MIGHT be perfectly adequate [I'm not sure re Lo-VHF], if a designer wanted to go the extra step, STB processor COULD pass a Control Voltage to one or more Varactors to Tweak Matching Network SWR for a particular Freq....and/or control physical mini-relays or electrical (switching diodes) to enable/disable various Tuning Coils.

Antenna Simulations, Overload Calculations, etc: http://imageevent.com/holl_ands
holl_ands is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Canadian TV, Computing and Home Theatre Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome