13. Test Procedure

Our engineers evaluate Pocket PCs and Palm OS PDAs in separate categories, because the hardware configurations are too dissimilar to allow for a fair comparison. However, the overall summary and the weighting applied to individual scores is the same for both device classes.

All PDAs have to undergo exactly the same set of tests. Our engineers test performance using PDA benchmarking software for Pocket PC and Palm OS handhelds that we developed in our lab. Both versions of this software measure CPU and 2D graphics performance and memory throughput. They also measure how quickly the devices can synchronize 1600 contacts with a Windows XP PC via USB.

Stamina Is Required

Anyone using a PDA on a daily basis knows the importance of good ergonomic design. As well as size and weight, display brightness also counts in this category. Dimly lit TFT displays like the Palm Zire become invisible in direct light. The key ergonomic factor, however, is battery life, and this is highlighted by our lab benchmarks. Our battery life benchmark test software runs the PDAs continuously by simulating stylus input to the screen every 30 seconds. Our engineers adjust all devices to a display brightness of 50 cd/m2, to ensure that the results are comparable. If, as in the case of the Dell Axim, this degree of brightness cannot be achieved, battery life is measured using the maximum brightness available.

We include a large number of factors in our features benchmark. These include memory expansion, display size in centimeters and pixels, slots for memory stick, CompactFlash or SD cards. As wireless connectivity with Bluetooth or Wireless LAN is becoming increasingly important, these affect our ratings more than an IrDA port.