Rf (Radio Frequency) Module Operation; Cordless Scanner - NCR RealScan 7837-3000 User Manual

1-12 Chapter 1: Getting Started
The base also is the scanner battery charger with the external 9VDC
power source applied. Once you place the scanner into base, the base
green LED responds accordin g to the Charge Status Indicator table
above.
The base can be powered by the Host (parasitic power mode). If the
base is in parasitic power mode without the 9VDC power source, the
base still functions, but does not charge the battery.

RF (Radio Frequency) Module Operation

The cordless system uses a state‐of‐the‐art two‐way Blueto oth radio to
transmit and receive data between the scanner and the base. Design ed
for point‐to‐point and multipoint‐to‐single point applications, the radio
operates using a license free ISM band, which sends relatively small
data packets at a fas t data rate over a radio signal with randomly
changing frequencies, which makes the cordless system highly
responsive to a wide variety of data collection applications and
resistant to noisy RF environments. Bluetooth Class 2 power leve l
provides range of 33 feet (10m) depending on the environment.

Cordless Scanner

The cordless scanner enables fast and accurate bar code scanning using
a non‐contact linear imager.
The scanner is comprised of a linear imager, a decode/contro l assembly,
and an RF communication module. The scan engine performs the bar
code image illuminatio n and sensing. The decode/control assembly
coordinates the central communication activities including: capturing
and decoding the bar code image data, performing software ac tivities
(parameter menuing, visual indicator support, low battery indication) ,
and data translation required for the host system. The RF
communication module performs the data exchange between the
scanner and the base.