參數(shù)資料
型號(hào)： CC2420
廠商： Electronic Theatre Controls, Inc.
英文描述： 2.4 GHz IEEE 802.15.4 / ZigBee-ready RF Transceiver
中文描述： 2.4 GHz IEEE 802.15.4標(biāo)準(zhǔn)/ ZigBee功能的RF收發(fā)器
文件頁數(shù)： 55/87頁
文件大?。?/td> 1418K
代理商： CC2420
SmartRF
CC2420
Modulated spectrum
The
CC2420
has a built-in test pattern
generator that can generate pseudo
random
sequence
generator. This is enabled by setting
MDMCTRL1.TX_MODE
to 3 and issue a
STXON
command strobe. The modulated
spectrum is then available on the RF pins.
The low byte of the CRC word is
transmitted and the CRC is updated with
0xFF for each new byte. The length of the
transmitted data sequence is 65535 bits.
The transmitted data-sequence is then:
using
the
CRC
[synchronisation header] [0x00, 0x78,
0xb8, 0x4b, 0x99, 0xc3, 0xe9, …]
Since a synchronisation header (preamble
and SFD) is transmitted in all TX modes,
this test mode may also be used to
transmit a known pseudorandom bit
sequence for bit error testing. Please note
that
CC2420
synchronisation,
synchronisation, for correct reception.
Packet error rate is therefore a better
measurement
for
performance.
requires
not
symbol
only
bit
the
true
RF
Another option to generate a modulated
spectrum is to fill the TXFIFO with pseudo-
random
data
MDMCTRL1.TX_MODE
to 2.
CC2420
will
then transmit data from the FIFO
disregarding a TXFIFO underflow. The
length of the transmitted data sequence is
then 1024 bits (128 bytes).
and
set
A plot of the modulated spectrum from
CC2420
is shown in Figure 31. Note that to
find the output power from the modulated
spectrum, the RBW must be set to 3 MHz
or higher.
A
Unit
dBm
RF Att
30 dB
Ref Lvl
0 dBm
SWT
5 ms
Center 2.45 GHz
Span 10 MHz
1 MHz/
1AVG
1SA
RBW
100 kHz
VBW
100 kHz
-90
-80
-70
-60
-50
-40
-30
-20
-10
-100
0
Date: 23.OCT.2003 21:34:19
Figure 31. Modulated spectrum plot
Chipcon AS
SmartRF
CC2420 Preliminary Datasheet (rev 1.2), 2004-06-09
Page 55 of 87
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參數(shù)描述
CC2420/T&R 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2.4 GHz IEEE 802.15.4 / ZigBee-ready RF Transceiver
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CC2420DBK 功能描述:Zigbee/802.15.4開發(fā)工具 CC2420 DEMO KIT 2 DEMO BOARDS RoHS:否 制造商:Silicon Labs 產(chǎn)品:Development Kits 工具用于評(píng)估:EM35x 頻率:2.4 GHz 接口類型:USB 工作電源電壓:
CC2420DK 功能描述:Zigbee/802.15.4開發(fā)工具 CC2420 DEVELOPMENT KIT RoHS:否 制造商:Silicon Labs 產(chǎn)品:Development Kits 工具用于評(píng)估:EM35x 頻率:2.4 GHz 接口類型:USB 工作電源電壓:
CC2420EMK 功能描述:Zigbee/802.15.4開發(fā)工具 CC2420 EVALUATION KT (2)PCBs & (2)ANTENNA RoHS:否 制造商:Silicon Labs 產(chǎn)品:Development Kits 工具用于評(píng)估:EM35x 頻率:2.4 GHz 接口類型:USB 工作電源電壓:
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