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參數(shù)資料
| 型號： | 73K222AL-IH |
| 廠商： | TDK Corporation |
| 英文描述： | V.22, V.21, Bell 212A, 103 Single-Chip Modem |
| 中文描述： | .22，.21，貝爾212A章，103單芯片調(diào)制解調(diào)器 |
| 文件頁數(shù)： | 24/28頁 |
| 文件大?。?/td> | 160K |
| 代理商： | 73K222AL-IH |
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73K222AL
V.22, V.21, Bell 212A, 103
Single-Chip
24
pattern was used for each data point. Noise was
C-message weighted and all signal-to-noise (S/N)
ratios reflect total power measurements similar to the
CCITT V.56 measurement specification. The individual
tests are defined as follows.
BER vs. S/N
This test measures the ability of the modem to operate
over noisy lines with a minimum of data-transfer
errors. Since some noise is generated in the best of
dial-up lines, the modem must operate with the lowest
S/N ratio possible. Better modem performance is
indicated by test curves that are closest to the BER
axis. A narrow spread between curves representing
the four line parameters indicates minimal variation in
performance while operating over a range of aberrant
operating conditions. Typically, a DPSK modem
will exhibit better BER-performance test curves
receiving in the low band than in the high band.
BER vs. Receive Level
This test measures the dynamic range of the
modem. Because signal levels vary widely over
dial-up lines, the widest possible dynamic range is
desirable. The minimum Bell specification calls for
36 dB of dynamic range. S/N ratios are held
constant at the indicated values while the receive
level is lowered from a very high to very low signal
levels. The width of the “bowl” of these curves,
taken at the BER point, is the measure of dynamic
range.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 73K222AL-IP | V.22, V.21, Bell 212A, 103 Single-Chip Modem |
| 73K222AU | Single-Chip Modem Modem with UART |
| 73K222AU-IH | Single-Chip Modem Modem with UART |
| 73K222AU-IP | Single-Chip Modem Modem with UART |
| 73K222BL | V.22, V.21, Bell 212A,Bell 103 Single-Chip Modem with Integrated Hybrid(V.22, V.21, Bell 212A,Bell 103,帶混合電路的單片Modem) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 73K222AL-IH/F | 功能描述:電信集成電路 Single Chip Modem /103 Modem Data Pump RoHS:否 制造商:STMicroelectronics 類型:Telecom IC - Various 工作電源電壓:4.75 V to 5.25 V 電源電流: 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-100 封裝:Tray |
| 73K222AL-IHR/F | 功能描述:電信集成電路 Single Chip Modem /103 Modem Data Pump RoHS:否 制造商:STMicroelectronics 類型:Telecom IC - Various 工作電源電壓:4.75 V to 5.25 V 電源電流: 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-100 封裝:Tray |
| 73K222AL-IP | 制造商:TDK 制造商全稱:TDK Electronics 功能描述:V.22, V.21, Bell 212A, 103 Single-Chip Modem |
| 73K222ASL-IP | 制造商:SSI 功能描述:1.2 kbps DATA, MODEM, PDIP22 |
| 73K222AU | 制造商:TDK 制造商全稱:TDK Electronics 功能描述:Single-Chip Modem Modem with UART |
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