Forum Discussion

Chris_Bryant's avatar
Chris_Bryant
Explorer II
Jan 05, 2016

HDMI over coax

I just found a somewhat reasonably priced RF modulator for HDMI that allows you to run HD video over coax, with a 1920 X 1080 @60hz being top resolution. While they do sell transmitter and receiver separately, the unit says it does QAM modulation, with a choice of 100 channels, so I don't know if a QAM equipped TV will work, or if you must buy the dedicated reciever.
Anyway, $90 for an HD modulator is pretty cheap, and even if you must buy the $90 receiver, it's still not too bad.
Stellar Labs HDMI over Coax.

6 Replies

Sort By
  • Gene_Ginny's avatar
    Gene_Ginny
    Explorer
    Jan 06, 2016
    Chris Bryant wrote:
    ..., so I don't know if a QAM equipped TV will work, ....
    It looks like it would not be compatable with cable TV clear QAM per this note in the manual:

    This product is designed to convert an HDMI source to an HD
    digital signal via coaxial cable. This conversion is different than
    standard CATV, as it uses 64QAM mode to convert the HDMI
    source to a HD digital TV signal. This type of signal can transmit
    over long distances on coaxial cable, and gives the user the ability
    to split and combine several signals with a common CATV
    splitter/combiner. With the advantages of good image quality,
    resistance to interference, and hundreds of channels available, it
    can be used in many applications including: CCTV, outdoor
    projection screens, shopping malls, advertising, education, and
    digital KVM.

    Video encoding H.264

    I also noticed from the frequency chart they use 8 MHz channel bandwith. However it is a great find for many applications.
  • GordonThree's avatar
    GordonThree
    Explorer
    Jan 05, 2016
    Probably the same device that RV "resorts" use to repackage Dish / DirectTV into the park's cable tv service.

    Neat find, thanks for sharing.
  • sch911's avatar
    sch911
    Explorer
    Jan 05, 2016
    Interesting, I'd start with just the transmitter and see if the TV can decode the QAM signal without the receiver. Be sure to read the section about signal attenuation which will most likely be needed in an RV scenario.

About RV Must Haves

Have a product you cannot live without? Share it with the community!8,798 PostsLatest Activity: May 04, 2025