参数资料
型号: 4021-DKDB2
厂商: Silicon Laboratories Inc
文件页数: 11/34页
文件大小: 783K
描述: KIT DEV TEST EZRADIO SI4021 TX
标准包装: 1
附件类型: 测试卡,发射器,915MHz
适用于相关产品: EZRadio?
Si4021
 
 
11
Modulated RF Spectrum
At 433 MHz with
180 kHz Deviation at 64 kbps
At 868 MHz with
180 kHz Deviation at 64 kbps
17:11:41 Dec 7, 2005
Ref 10 dBm
Atten 20 dB
#Samp
Log
10
dB/
VAvg
24
W1 S2
S3 FC
AA
Center 434 MHz
#Res BW 1 kHz
#VBW 1 kHz
Span 2 MHz
Sweep 4.074 s (2000 pts)
 
17:26:17 Dec 7, 2005
Ref 10 dBm
Atten 20 dB
#Samp
Log
10
dB/
VAvg
50
W1 S2
S3 FC
AA
Center 868 MHz
#Res BW 1 kHz
#VBW 1 kHz
Span 2 MHz
Sweep 4.074 s (2000 pts)
 
Spurious RF Spectrum
With 10 MHz CLK Output Enabled at 433 MHz
Antenna Tuning Characteristics
750970 MHz
17:18:23 Dec 7, 2005
Ref 10 dBm
Atten 20 dB
Mkr1 D  19.98 MHz
-44.23 dB
#Peak
Log
10
dB/
VAvg
3
W1 S2
S3 FC
AA
Center 434 MHz
#Res BW 3 kHz
#VBW 300 Hz
Span 50 MHz
Sweep 45.47 s (2000 pts)
1
1R
 
 
The antenna tuning characteristics was recorded in max-hold state of the spectrum analyzer. During the measurement, the transmitters
were forced to change frequencies by forcing an external reference signal to the XTL pin. While the carrier was changing the antenna tuning
circuit switched trough all the available states of the tuning circuit. The graph clearly demonstrates that while the complete output circuit
had about a 40 MHz bandwidth, the tuning allows operating in a 220 MHz band. In other words, the tuning circuit can compensate for 25%
variation in the resonant frequency due to any process or manufacturing spread.
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