WiFi & GPS

The WiFi stack gets an update with the new iPad courtesy of Broadcom's 65nm BCM4330, compared to the BCM4329 used in the previous two iPads. Both 2.4GHz and 5GHz operation are supported, although as I mentioned earlier the carrier-dependent personal hotspot is only available over 2.4GHz.

As with most smartphone/tablet designs the BCM4330 only supports a single spatial stream, for a maximum link speed of 72Mbps. Similar to the iPad 2, Apple hides the WiFi antenna behind the speaker grille at the bottom of the tablet. The cellular antennas (there are now two) are at the top of the tablet, behind the plastic RF window.

WiFi Performance Comparison
Distance from AP 3 feet 20 feet (Different Room) 50 feet (Different Room/Floor) 100 feet (Different Room)
ASUS TF Prime (2.4GHz) 26.9 Mbps 9.85 Mbps 13.5 Mbps 2.20 Mbps
Apple iPad 2 (2.4GHz) 35.1 Mbps 29.9 Mbps 26.9 Mbps 10.6 Mbps
Apple iPad 3 (2.4GHz) 35.1 Mbps 29.9 Mbps 27.9 Mbps 9.98 Mbps
Apple iPad 2 (5GHz) 36.7 Mbps 36.7 Mbps 36.7 Mbps 11.9 Mbps
Apple iPad 3 (5GHz) 36.7 Mbps 36.7 Mbps 36.7 Mbps 11.7 Mbps

With a similar WiFi stack and similar antenna placement, it's no surprise that I noticed very similar WiFi performance to the iPad 2.

The same goes for GPS performance between the new iPad and the iPad 2. Both devices were able to lock and track me driving around in a car with comparable accuracy from what I could tell.

Airplay Support with the new Apple TV

When paired with a second or third generation Apple TV, the iPad supports wireless display mirroring or content streaming to the iPad via AirPlay. In other words, if you have an Apple TV hooked up to your HDTV, you can use your HDTV as a large, mirrored, secondary display for your iPad—wirelessly. The only requirement is that you have a 2nd or 3rd generation Apple TV and that it's on the same network as your iPad. With those requirements met, enabling AirPlay mirroring is simple—just bring up the iOS task switcher, swipe left to right until you see the brightness/playback controls and tap the AirPlay icon.

Mirroring gives you exactly what you'd expect—a complete mirror of everything you see on the local iPad screen. All sounds are also sent over and come out via your TV's speakers—the local speaker remains silent.

The frame rate isn't as high on the remote display, but there's virtually no impact to the performance of the iPad itself. There's noticeable latency of course since the display output is transcoded as a video, sent over WiFi to the Apple TV, decoded and displayed on your TV via HDMI. I measured the AirPlay latency at ms, which is reasonable for browsing the web but too high for any real-time games. If you want to use the iPad to drive your HDTV for gaming you'll need to buy the optional HDMI output dongle.

While AirPlay mirroring on the iPad works at 720p, if you're playing a 1080p movie on the new iPad and you have a 3rd generation Apple TV, the video is also displayed in 1080p rather than downscaled to 720p.

Video playback is an interesting use case for AirPlay and the iPad. If you don't have mirroring enabled, you can actually start playing a movie on the iPad, have it stream to your TV via the Apple TV, and go about using your iPad as if nothing else was happening. Most apps will allow you to stream video in the background without interrupting, however some games (e.g. GTA 3, Infinity Blade 2) and some apps (e.g. iMovie) will insist on streaming their UI to your Apple TV instead.

Although iOS and the iPad don't do a great job of promoting multi-user experiences, using AirPlay to push video to a TV wirelessly is an exception. If you frequently load your iPad up with movies you can use it to keep others entertained while you either get work done or just goof around on your iPad at the same time. It's a great fit for families where people want to do two different things. If you do put a lot of movies on your iPhone/iPad, the 3rd generation Apple TV is probably a must buy for this reason alone.

Gaming Conclusion & Controller Support: An Android Advantage What's Next: 6th gen iPhone, Haswell & Windows 8
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  • sciwizam - Wednesday, March 28, 2012 - link

    Did the test suite change from your review of the Galaxy Tab 10.1 LTE? Reply
  • Anand Lal Shimpi - Wednesday, March 28, 2012 - link

    It did indeed, let me see if I can't run the updated suite on the Galaxy Tab 10.1 LTE though...

    Take care,
    Anand
    Reply
  • jadawgis732 - Wednesday, March 28, 2012 - link

    Hey Anand, I always wanted to say how much I admire your reviews, and how unbiased and untouched by corporate dollars they are. Keep up the great work! Also, it's very nice to see you responding to replies in the comments! Reply
  • Anand Lal Shimpi - Thursday, March 29, 2012 - link

    Thank you for the kind words and for reading the site :)

    Take care,
    Anand
    Reply
  • medi01 - Thursday, March 29, 2012 - link

    Samsung Galaxy Tab randomly dissapearing from charts where it would look favourably indeed leaves "unbiased" impression. (For instance color gamut is on par with "ipad 3" and way above ipad2) Reply
  • Anand Lal Shimpi - Friday, March 30, 2012 - link

    I promise it's not that sinister :) I simply opted to compare to the best of the best out there today as far as Android tablets are concerned: the ASUS Transformer Prime.

    I understand the desire for more results so I'll be working on them in the background over the weekend.

    Take care,
    Anand
    Reply
  • xytc - Wednesday, March 28, 2012 - link

    I've heard that Apple's strong marketing campaign penetrates pussies, so if you have an Apple product you're nothing but a pussy. LMFAO Reply
  • PeteH - Wednesday, March 28, 2012 - link

    Really? Reply
  • MobiusStrip - Thursday, March 29, 2012 - link

    "LMFAO"?

    Wow, low humor threshold.
    Reply
  • Wardawg - Thursday, April 05, 2012 - link

    Well most people adept in technology or use tech in their buisness use apple products: djs programmers, and others, and frankly I see more iPhones being used than androids. So apparently most of the world is pussies by your definition. Please do research before you bash a company's products Reply

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