Comtrend PG-9172 G.hn Powerline Adapter Reviewed

[Scott Willy]

"G.hn occupies a band from 300 MHz to 2.6 GHz,"
The above is false.

On powerline G.hn uses 2-50 MHz or 2-80 MHz bands. The Marvell chip in MIMO mode uses 2-50 MHz band in SISO mode uses 2-80 MHz.

 

[thiggins]

Thanks for the feedback. Can you cite your reference, please?

I used http://homegridforum.org/uploads/resources/5CFw/o6Pa.pdf, the OFDM PARAMETERS AND BANDPLANS section on pages 3 and 4. But I may have misinterpreted the information.

Now that I look at it again, it looks like I may have referenced the G.hn coax frequency band.

From another reference I got

 

[Scott Willy]

From the G.9964 standard table 6-4.

Also have look at the table on page 2 of:
http://www.sigmadesigns.com/wp-content/uploads/CG5300_br.pdf

And the PHY Data Rates on page 1 of:
http://www.marvell.com/in-home-networking/ghn/assets/Marvell_Ghn_Chipset-002_product brief.pdf

 

[thiggins]

I sorted this out with Comtrend and corrected the article. Thanks again for pointing out the error.

 

[Chuck Petras]

So my takeaway from the article is that I can use the two different technologies (G.hn, AV/AV2) to create two independent bridges?

How does it handle two-phase wiring? For instance there is a transformer on my power poll that brings down two 120V feeds. I imagine these are distributed to different circuits in my master circuit breaker panel.

Background for my question is that my broadband router is located in an upstairs bedroom next to where my wide area wifi comes into the house. Eventually the telco offered dsl (I'm like 19,000 ft from the co), so I used the existing telco copper to locate the dsl next to the router. Unfortunately the house copper sucks (lots of noise). I've been using an Actiontech pwr500 to bridge to a backroom where I've got the printer and some other stuff.

If I move the dsl modem to where the telco line comes into the house it locks great. So I'd like to use another power line bridge to get the ethernet out of the dsl modem back to the router.

 

[Scott Willy]

So my takeaway from the article is that I can use the two different technologies (G.hn, AV/AV2) to create two independent bridges?

You can, but there is not really many reasons to do so. The sharing of the bandwidth is smarter if you use the same technologies. You can have two independent (logical ) bridges (aka LANs) using the same technologies.

How does it handle two-phase wiring? For instance there is a transformer on my power poll that brings down two 120V feeds. I imagine these are distributed to different circuits in my master circuit breaker panel.

The signals from either technology will cross phases in the circuit breaker. The is a small loss of performance, but it generally works. But remember when using and powerline communications product, buy from a store with a good returns policy in case it does not work.