Set by program: Presumably sets the aspect ratio as the content maker requests.
Letterbox: Keeps wide-screen programs in their original form, but adds black bars on both the top and bottom of the picture.
Cropped: Maintains the proper aspect ratio, but literally crops out of the extreme right and left sides of the picture.
Squeeze: Doesn't remove any part of the picture, but distorts the aspect ratio, making people look tall and skinny.
The NS-DXA1-APT also doesn't have a problem displaying a full wide-screen image if connected to a wide-screen TV--which is a step-up over the RCA DTA800B1.
The NS-DXA1-APT also has what's called analog pass-through, which means that it's capable of letting an analog signal pass through its RF output, to your TV that has an analog NTSC tuner. While it's a nice addition to the feature set over its predecessor, the NS-DXA1, its usefulness will be limited for most users, since after February 17, 2009 the vast majority of analog TV broadcasts will stop. There are, however, some low-power analog stations that will continue to use analog broadcasts, and some people may still be able to pick up some international analog TV broadcasts if they currently receive them.
The NS-DXA1-APT has a basic set of connectivity options. There are two RF-style F connectors, which are the connecters that have the screw threads on the outside and the small hole inside. One is an antenna input and should be connected to the antenna using a coaxial cable. The other F connector says "To TV (RF)" and is a video output. This means you can send analog video and audio from the NS-DXA1-APT to your TV by connecting a coaxial cable. In addition to the F connectors, the NS-DXA1-APT has a composite-video output along with stereo RCA analog outputs--the standard yellow, red, and white outputs. If your TV has the proper inputs, you should use this output as it offers superior audio and video quality over the RF connection.
Mostly everything you need to get the NS-DXA1-APT is including in the box. There are two cables--an RF cable and a composite-video cable with stereo audio cables. We definitely appreciate the composite-video cable, as both the RCA DTA800B1 and the GE 22730 stingily only include an RF cable. A single AAA battery for the remote is also included.
While the NS-DXA1-APT includes all the critical features you'd want on a DTV converter box, there are some extras missing. Some of the DTV boxes--such as the RCA DTA800B1--include an option to use with a Smart Antenna, which is a special kind of antenna that supposedly is able to reposition itself to get the best reception. We haven't been able to test this functionality on any of the boxes yet, but the Smart Antennas we've seen are so expensive we find it hard to believe it's worth the money for connecting to such a bargain DTV box. There are a few DTV boxes--such as the Apex DT250 that feature an S-Video output, which can provide better video quality than that composite video. This should only matter if you currently have a TV that has an S-Video input.
Reception performance on the NS-DXA1-APT was solid. We were able to tune into all of the major stations from our Manhattan location and we very rarely saw artifacts because of reception problems. We also tuned in from Queens, New York, and signal quality was just as good. Remember, you'll only be able to tune into the free stations broadcast over the air--that means no Comedy Central, CNN, and so on. From our Manhattan location, we were able to tune into the major networks (CBS, NBC, Fox, ABC), plus PBS, The CW, My 9, plus some religious and Spanish channels. The channels you can actually receive depends on your location, and you can use tools such as AntennaWeb or TV Fool to help determine what channels you can expect to get.
In terms of video quality, we were pretty impressed with the Insignia NS-DXA1-APT. Switching back and forth between the GE 22730 and the Insignia NS-DXA1-APT while watching The Price is Right we saw a substantial difference. The image from the GE 22730 was filled with jaggies and other image distortions, while the NS-DXA1-APT looks comparatively smooth and jaggy-free. This difference was apparent on all the other channels as we flipped around, indicating it was a difference in the boxes' overall video performance and not just on a particular program.
One minor issue we did run into was some strange audio behavior, such as sibilant noises, like s's, sounding harsh and, occasionally, washed out, like an overcompressed MP3. While this was very noticeable on the NS-DXA1, the effect is considerably lessened on the NS-DXA1-APT. While it's still a minor issue--and those sensitive to audio quality should steer clear--we're guessing many people won't mind or notice.