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DoctorVeg
Reel Rookie

ROKU express conversion to Coax Type F

 

I just bought a refurbished Octane recumbent elliptical with a TV built in.  It has both a direct HDMI input, as well as a Coax input. The TV takes NTSC and ATSC input as well as a bunch of older (PAL) formats according to it’s spec sheet, and is largely used in professional gyms with coax feeds.

Using an HDMI cable directly from the Roku to the TV port, i get an error saying to check all my cables and restart all the units.  Of course, the cables are fine and reboots do nothing.  I assume this is copy protection built into the Roku

 

I purchased an HDMI to coax converter, and set it to NTSC, broadcasting on channel 3,   So now it is ROKU▶️HDMI cable  ➡️HDMI to Coax Converter➡️Coax RF cable>➡️TV.

  Channel 3 on the TV now picks  up the signal but the picture is awful.  It is nowhere near the 1080 promised by both the converter manual and the TV specs.  I tried to set the ROKU express output at 1080 and 720, both resulted in lousy picture quality. Is this a copy protection scheme that I am not providing a work around for?

 

Thanks in advance!

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3 REPLIES 3
Strega2
Roku Guru

Re: ROKU express conversion to Coax Type F

NTSC is an 80-year-old analog video standard roughly equivalent to 480i.  (Which in turn might correspond to about 360p.)   So that’s where your video quality went.

Banned but back. Because why not?
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DoctorVeg
Reel Rookie

Re: ROKU express conversion to Coax Type F

ah....got it.

The octane screen will take ATSC as well, but the only HDMI to ATSC converter i could find was $300+, approaching the value of the machine. 

Any suggestions how to port HDMI to ATSC at a  reasonable price point?


R

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DoctorVeg
Reel Rookie

Re: ROKU express conversion to Coax Type F

So I found an HDMI input on the Octane Elliptical screen, buried in it’s guts.  The manual says it is unused.

I went HDMI to HDMI from a ROku express, and got the same lousy resolution.

However, I added this baby to the output of the ROKU:

https://www.amazon.com/ViewHD-Powered-Splitter-1080P-Model/dp/B004F9LVXC/ref=sr_1_3?crid=IGR17R34C4F...

…and then from this splitter (using only one of it’s 2 output ports) into the Octane.  Video now crisp, looks like 1080p.  Clearly something about the copy protection scheme that this little splitter fixed.  All legal (no recording going on, just viewing on a non-standard device.

HOpe this helps someone else.

 

R

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