Month of July 2002

APCO Project 25 Conventional System While current Subscriber Two-Way Radios con- tain timers for measuring differences in time, there is no internal clock for keeping track of time of day.

Reliably testing tine pitch BGA (Ball Grid Array 1.0 and .8 mm pitch) devices in initial test software development phase and final manufacturing test environment. There are two problems in testing these new packages. First is that the outside pack- age outline does not allow sufficient accuracy to align the ball grid...

Many peer-to-peer protocols improve efficiency by using compression algorithms to reduce the amount of data that is required to be transmitted. This reduction implies that less bandwidth is required for transmission, which improves band- width efficiency and protocol performance. However, compression algorithm...

A proposal for a novel G.728 synchronization scheme using the Auto-Correlation Function (ACF) of a Pseudo-Random Binary Sequence (PRBS) and bit-stealing to allow in-band sychronization.

The services provided by iDEN are dramatically growing. The number of users in single fleet is becoming more and more. And the usage of radios is becoming more and more active. Now for group structure like DAP, the single user spends with radioactivity more than two hours per day, while 20 minutes per day two years...

This design satisfies the requirement for an inte gral three hour minimum battery backup for a ten watt Base Station.

In SmartZone OmniLink systems, subscriber units can only scan for talkgroups that are afl?liated at the same site as the scanning subscriber unit. This means that desired audio may be missed by a scanning subscriber, if another subscriber isn't afftli- ated with the talkgroup being scanned.

A field emission flat panel display utilizes get- tering material to absorb gasses and maintain ade- quate display vacuum after seal. During the seal process the anode and cathode are held in parallel, separated from each other in a seal fixture. The frit frame lies on top of the cathode, and the getters are loaded...

This idea deals with optimized Master/Slave communication on SPI (Serial peripheral interface) devices in embedded microprocessor controlled sys- tems.

Typically, subscriber units transmit a unique unit ID so that the listening party (another subscriber, console, etc.) can identify the transmitting unit. Because a unit ID is not by itself a good description of who is talking, a pre-programmed name or the like alias may be used and transmitted in lieu of or together...