Jan 18, 2013

EDUP EP-MS1532 Ralink RT3072 Review

Well, that, as soon as possible a "bare" of this novel adapter group 4, Tx and Rx antenna switch apart without RT3072 chipset, I think that will mark a before and after in urban use wireless adapters.

The components in detail:

If first impressions are everything an adapter is outstanding, thoroughly analyzing it is not so.

A short distance and with omnidirectional antennas that brings you a very high traffic transfers, but for medium - long distance is very inefficient, unbalanced.

The reception is much more efficient than the transmission, so the AP's detected, only the closest achievable will not because it does not have sufficient transmission power is that power is wasted by bringing omnidirectional antennas.

For medium - long distances have to adopt an asymmetrical configuration of the antenna making it unattractive for these applications.

In the image on the transmission a parabolic Maquia - Chalenger with an illuminator 2Ni Dragonfly Belgrano, to reach the target at 30km, to receive just one planar, totally unbalanced.

Recommended only for short distances and high data transfers. - mandarache


Nice blog and realy informative

where that bought come from?

@ Renier Cabillan : you can buy this twin antenna USB WiFi on any computer shop near your place for you to have warranty in case for a nontechie guy at least you can return of faulty, not advisable to buy online store.

There sould be RF shileding at PCB (big gold rectangle on PCB). Producer has forgotten to do it. See TP link 722 N for reference).

I have made myself one, from beer aluminium can, it should be 2,5 to 3 mm high with cooling holes and have small pins for putting them through PCB and bend.


Pins should be like this


and holes like in the comment above or more holes

@ rhymemistake :

You are absolutely correct and there should be a metal cover to protect the chips to helps the interference in shielding it, but for my observation Ralink Chips is not as good as Realtek.

I think that classic PCI wifi cards are better (mostly Realtek) than USB wifi cards (Ralink). Even wifis inside notebooks have better sensitivity than USB ones.

The problem is:
Lower operating voltage in USB wifi cards as I heard.
And current too, I have measured 350 mA on my USB port, where the USB standard is 500. Usual USB wifi cards have consumption of the same 350 mA at peak, so there is no amperage (power) reserve at all.

Easyest way is to buy Mikrotik or Ubiquiti (I thik I should done before :-), they have MIMO models too. Some models that are primarily designed to be access points are far more powerfull and can be used as wifi adapters for receiving (Ido not know if the power is lowered at that mode). They do not use USB port but classic ethernet port (or PCI) and adaptor, so the voltage is high and wifi can be placed far from PC (up to 100m as we know:-). Price is doubled, but there is usually 30V adaptor in the package.

As to me at my site, the best thing is to play with polarisation. I put my receiver antenna horrizontaly where the the accses point have them normal - vertical, so they are perpendicular now. There is a vertical distance between them, and now it gave me super signal.

I found some new things on wikipedia about lon distance connections, parabolas with yagi in focus etc. they got above 300 km distance.

Thanks for your test above. It was well appeciated. Greetings from Slovakia :-)

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