CC2400-RTR1 datasheet(39/84 Pages) TI2

39 / 84 page

CC2400

SWRS042A

Page 39 of 83

29 Receiver Channel Bandwidth

In order to meet different channel width

and channel spacing requirements, the

receiver’s digital channel filter bandwidth

is programmable. It can be programmed

from 125 to 1000 kHz.

The GRDEC.CHANNEL_DEC[1:0] register

bits control the bandwidth.

The

table

below

summarizes

the

selectable channel bandwidths.

Channel filter

bandwidth

[kHz]

GRDEC.CHANNEL_DEC[1:0]

[binary]

1000

500

250

125

There is a tradeoff between selectivity and

accepted

frequency

tolerance.

applications where larger frequency drift is

expected (depends on the accuracy of the

crystal), the filter bandwidth should be

increased, at the expense of reduced

adjacent channel rejection (ACR).

It is strongly recommended to use one of

the three settings for over-the-air data

rates

and

channel

bandwidths

described in the section “Data Rate

Programming” on page 40.

CC2400-RTR1 数据表(PDF) 39 Page - Texas Instruments

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