The most popular mobile phone in 1998

BB machine generally refers to pager.

The called user receiver in the wireless paging system. It consists of superheterodyne receiver, decoder, control and display.

It selects the useful signal to be received from the paging signal and interference transmitted by the base station, restores it to the original baseband signal for paging the machine, and generates sound (or vibration) and displays numbers (or letters, Chinese characters) messages.

Targeting mode

The BP machine has two modes: manual tandem and automatic tandem. The corresponding paging stations are called manual paging stations and automatic paging stations. Manual paging stations require manual operation to encode this information and send signals through the transmitter.

The automatic paging station automatically finds out the pager's phone number based on the line number of the incoming call and sends it out at the same time, so that the paged person knows which phone is paging. Frequently used pagers are divided into two categories: digital pagers and Chinese pagers. Digital pagers are compact, low-priced, and practical. Chinese pagers directly display Chinese characters and the information is easy to identify.