Elboxrf sold the technology for the Wide Area Alphanumeric Paging System to the other company. This sophisticated system included the following products (all the components were designed in 1996):
alphanumeric pager - PAGER
multi-processor control unit - MPCU
digital RF modulator - DRFM
RF power amplifier - RFPA
Intelligent DC power supply - IPS


PAGER

This was a successor of pager receivers developed in Elbox in the years 1992-1995. Designed in the middle of 1996, attractively styled with a capability of receiving up to 7 alphanumeric messages with up to 120 characters, with a lot of non-volatile memory, equipped with an 1x12 alpha and 1x12 numeric characters LCD with backlight, a vibrating motor, a buzzer, a removable clip, and a lot of useful function.

Typical battery (2x AAA alkaline) life was 2000 hrs with 5 calls/hr with vibrate option switched off.

FIG. 1

Pager and the PCB. Below the LCD there was a plastic element for light scattering. As a result a display was evenly backlighted by a one surface mounted LED.

FIG. 2
The bottom view of the PCB. The important feature of this pager was a two layer PCB. After a very carefull design all the logic and RF circuitry were excellent decoupled from each other.

FIG. 3

The top view. From the left to right: an LCD, a DC/DC up-converter with a temperature compensation for an LCD, an EEPROM, POCSAG decoder, an xtal, an FSK receiver and a buzzer. The vibrating motor was under a buzzer. Below an antenna. As you can see, it was grounded.

FIG. 4

An another view. The LCD is folded. Seven gold-plated points were used for programming the device.