- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄370292 > FX919A 4-Level FSK Packet Data Modem PDF資料下載
參數(shù)資料
| 型號(hào)： | FX919A |
| 英文描述： | 4-Level FSK Packet Data Modem |
| 中文描述： | 四級(jí)別FSK信號(hào)分組數(shù)據(jù)調(diào)制解調(diào)器 |
| 文件頁數(shù)： | 38/44頁 |
| 文件大?。?/td> | 1537K |
| 代理商： | FX919A |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁當(dāng)前第38頁第39頁第40頁第41頁第42頁第43頁第44頁
4-Level FSK Modem Data Pump
FX919A
1996 Consumer Microcircuits Limited
38
D/919A/4
1.6.5
Radio Performance
The maximum data rate that can be transmitted over a radio channel using these modems depends on:
-
-
-
-
-
-
-
-
-
RF channel spacing.
Allowable adjacent channel interference.
Symbol rate.
Peak carrier deviation (modulation index).
Tx and Rx reference oscillator accuracies.
Modulator and demodulator linearity.
Receiver IF filter frequency and phase characteristics.
Use of error correction techniques.
Acceptable error rate.
As a guide, 4800 symbols/sec can be achieved - subject to local regulatory requirements - over a system with
12.5kHz channel spacing if the transmitter frequency deviation is set to ±2.5kHz peak for a repetitive ' +3 +3 -
3 -3 ... ' pattern and the maximum difference between transmitter and receiver 'carrier' frequencies is less than
2400Hz.
The modulation scheme employed by these modems is designed to achieve high data throughput by exploiting
as much as possible of the RF channel bandwidth. This does, however, place constraints on the performance
of the radio. In particular, attention must be paid to:
-
Linearity, frequency and phase response of the Tx Frequency Modulator. For a 4800
symbols/sec system, the frequency response should be within ±2dB over the range 3Hz to
5kHz, relative to 2400Hz.
-
The bandwidth and phase response of the receiver's IF filters.
-
Accuracy of the Tx and Rx reference oscillators, as any difference will shift the received signal
towards the skirts of the IF filter response and cause a dc offset at the discriminator output.
Viewing the received signal eye - using the Mode Register RXEYE function - gives a good indication of the
overall transmitter/receiver performance.
Figure 20 Typical Connections Between Radio and FX919A
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| FXA1012 | Frame Transfer CCD Image Sensor |
| FXA1012WC | Frame Transfer CCD Image Sensor |
| FXC6000 | Distributed Power Front-End |
| FXC7000 | Distributed Power Front-End |
| FXC7000-48-S | Distributed Power Front-End |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FX919AD2 | 制造商:CMLMICRO 制造商全稱:CML Microcircuits 功能描述:4-Level FSK Modem Data Pump |
| FX919AD5 | 制造商:CMLMICRO 制造商全稱:CML Microcircuits 功能描述:4-Level FSK Modem Data Pump |
| FX919AP4 | 制造商:CMLMICRO 制造商全稱:CML Microcircuits 功能描述:4-Level FSK Modem Data Pump |
| FX919B | 制造商:CMLMICRO 制造商全稱:CML Microcircuits 功能描述:Evaluation Kit User Manual |
| FX929A | 制造商:CMLMICRO 制造商全稱:CML Microcircuits 功能描述:4-Level FSK Modem Data Pump |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。