參數(shù)資料
型號(hào)： 4432-T-B1 B 915
廠商： Silicon Laboratories Inc
文件頁(yè)數(shù)： 32/47頁(yè)
文件大小： 799K
描述： KIT DEV TEST EZRADIOPRO SI4432
標(biāo)準(zhǔn)包裝： 1
附件類型： 測(cè)試卡，收發(fā)器，915MHz
適用于相關(guān)產(chǎn)品： EZRadioPRO?
Si4430/31/32-B1
32
Rev 1.1
4. Modulation Options
4.1. Modulation Type
The Si4430/31/32 supports three different modulation options: Gaussian Frequency Shift Keying (GFSK),
Frequency Shift Keying (FSK), and On-Off Keying (OOK). GFSK is the recommended modulation type as it
provides the best performance and cleanest modulation spectrum. Figure 12 demonstrates the difference between
FSK and GFSK for a Data Rate of 64 kbps. The time domain plots demonstrate the effects of the Gaussian filtering.
The frequency domain plots demonstrate the spectral benefit of GFSK over FSK. The type of modulation is
selected with the modtyp[1:0] bits in "Register 71h. Modulation Mode Control 2". Note that it is also possible to
obtain an unmodulated carrier signal by setting modtyp[1:0] = 00.
Figure 12. FSK vs GFSK Spectrums
modtyp[1:0]
Modulation Source
00
Unmodulated Carrier
01
OOK
10
FSK
11
GFSK (enable TX Data CLK when direct mode is used)
TX Modulation Time Domain Waveforms -- FSK vs. GFSK
-1.0
-0.5
0.0
0.5
1.0
-1.5
1.5
50
100    150    200    250    300    350    400    450
0
50
-0.5
0.0
0.5
-1.0
1.0
time, usec
TX Modulation Spectrum -- FSK vs GFSK (Continuous PRBS)
-80
-60
-40
-100
-20
-200    -150    -100
-50
0
50
100
150
200
-250
250
-80
-60
-40
-100
-20
freq, KHz
DataRate
64000.0
TxDev
32000.0
BT_Filter
0.5
ModIndex
1.0
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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4432-T-B1C915 制造商:Silicon Laboratories Inc 功能描述:One antenna Tx/Rx test card 915MHz
4432W-1"x72yd 功能描述:膠帶 70002457219 4432W YDA WHITE 1 IN X 72 YD BULK RoHS:否 制造商:3M Electronic Specialty 產(chǎn)品:Tapes 類型:Shielding 描述/功能:EMI/RFI Foil Shielding Tape 顏色: 材料:Copper Foil 寬度:1 in x 18 yds
4432W-1/2"x72yd 功能描述:膠帶 4432WYDA WHITE 1/2X72YD BULK RoHS:否 制造商:3M Electronic Specialty 產(chǎn)品:Tapes 類型:Shielding 描述/功能:EMI/RFI Foil Shielding Tape 顏色: 材料:Copper Foil 寬度:1 in x 18 yds
4432W-1/2X72YD 制造商:3M Electronic Products Division 功能描述:
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