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參數(shù)資料
| 型號： | XE1202 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Low-power, integrated UHF transceiver |
| 中文描述： | 低功耗，超高頻收發(fā)器集成 |
| 文件頁數(shù)： | 9/26頁 |
| 文件大?。?/td> | 451K |
| 代理商： | XE1202 |
Data Sheet
XE1202
XX
VAL1
VAL2
VAL3
VAL4
XX
XX
VAL2
VAL4
RTParam_RSSI
rssi_out
datain
DataOut_RSSI
TS_RS
en
Figure 1 RSSI measurement timing diagram
For applications where the time needed to get the first right result from the RSSI has to be as low as possible, this
time can be minimized by waking up the RSSI during mode 010 instead of 100 which is the condition for the
definition of TS_RS in page 6 (for definition of modes, see pages 19 and 20).
4.1.4
When activated, this function provides information about the frequency error of the local oscillator compared with
the input carrier frequency. The condition on the modulation index for proper behavior of the FEI function is:
2
≥
=
BR
where
f is the frequency deviation and BR is the bit rate.
There are 2 modes of operation for this function selected by the bit “RTParam_Fsel” (see the Configuration register
section below).
IMPORTANT NOTE
To guarantee proper behavior of the FEI, the sum of frequency offset and the signal bandwidth (ssb) should be
lower than the baseband filter bandwidth (single sided). That is
Frequency Error Indicator - FEI
,
f
β
f
offset
+ SignalBW < Baseband_filterBW
where f
offset
is the difference between the carrier frequency and the LO frequency, SignalBW is the signal bandwidth
(single sided) equal to the sum of the bitrate divided by 2 and the frequency deviation (Bitrate/2 + Frequency
Deviation), and Baseband_filterBW is the channel filter bandwidth defined by the RTParam_BW parameter (see the
Configuration Registers section below).
4.1.4.1
“RTParam_Fsel” = 1
To activate the FEI function, the bit “RTParam_FEI” must be set to “1”. When activated, the function provides a 2-
bits status stored in register “DataOut_FEI”. The meaning of this output is given in the following table, where f
LO
is
the internal local oscillator frequency, and f
RF
is the carrier frequency of the received signal.
DataOut_FEI
Meaning
0 0
f
LO
-f
RF
≤
f
ERR
0 1
-
1 0
(f
LO
-f
RF
) > f
ERR
1 1
(f
LO
-f
RF
) < -f
ERR
Table 2 FEI status description
9
D0211-105
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| XE1202 | 制造商:Roxburgh EMC 功能描述:CR NETWORK PCB MOUNT |
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| XE1202AI027TRLF | 制造商:Semtech Corporation 功能描述:RF Transceiver FSK 2.5V/3.3V 44-Pin LQFP T/R 制造商:Semtech Corporation 功能描述:XE Series 902 - 928 MHz 76.8 kbps Low Power Integrated UHF Transceiver - LQFP-44 制造商:SEMTECH 功能描述:XE Series 902 - 928 MHz 76.8 kbps Low Power Integrated UHF Transceiver - LQFP-44 |
| XE1202I027 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Low-power, integrated UHF transceiver |
| XE1203 | 制造商:OKAYA 制造商全稱:OKAYA 功能描述:SPARK QUENCHER |
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