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參數(shù)資料
| 型號： | MAX2396 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Evaluation Kit |
| 中文描述： | W-CDMA/W-TDD/TD-SCDMA零IF接收器 |
| 文件頁數(shù)： | 4/13頁 |
| 文件大?。?/td> | 742K |
| 代理商： | MAX2396 |
E
Testing the WCDMA Receiver
The power-up default state of the MAX2396 receiver is for:
LO midband (2140MHz)
LNA high gain
Mixer high gain, normal linearity
Powered on (out of shutdown)
1) Verify that the IC itself is drawing about 31mA (from
VCC_IC). The two MAX4444 differential line drivers
at the baseband outputs should draw about 80mA
from each of their supplies.
2) Use the AGC adjust potentiometer on the board to
set VAGC at +2.2V (maximum gain).
3) Spot-check the VCO tuning voltage (TUNE) to see
that the synthesizer on the MAX2150 is locked. The
voltage should be about midsupply with the RFLO
running at its power-up default of 2140MHz.
Disconnect any leads from this before continuing, as
the noise pickup onto the tuning line directly fre-
quency modulates the VCO, and degrades LO
phase noise.
4) Observe the 180kHz tone on the spectrum analyzer.
Adjust AGC to achieve a -3.5dBm output level.
5) The on-board TCXO has a fine-tuning control
—
the
other potentiometer on the EV kit allows for external
temperature compensation of the TCXO to further
decrease frequency error. Adjust the TCXO poten-
tiometer if desired to bring the output tone exactly
to 180kHz.
6) Observe the other output on the oscilloscope. At
these input power levels, the SNR is typically much
too low to see the output tone through the noise. If
available, use the internal lowpass filter option
(often 20MHz) and lots of averaging.
7) To make a gain/phase error measurement, connect
both outputs to the scope. Increase the input power
to about -50dBm, and back off the AGC until the
outputs are swinging about 0.42V
P-P
. Again, use
digital averaging to get both I and Q sinusoids visi-
ble on the scope. If automated measurements for
phase and amplitude are not available, use the cur-
sors to make the measurement. Calculate phase
error in degrees, and gain error in dB, and verify
that the results are better than 2 degrees and
0.6dB, respectively.
MAX2396 Evaluation Kit
4
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX2396EGI | 功能描述:射頻接收器 RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel |
| MAX2396EGI-T | 功能描述:射頻接收器 RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel |
| MAX2396EVKIT | 功能描述:射頻開發(fā)工具 RoHS:否 制造商:Taiyo Yuden 產(chǎn)品:Wireless Modules 類型:Wireless Audio 工具用于評估:WYSAAVDX7 頻率: 工作電源電壓:3.4 V to 5.5 V |
| MAX239C/D | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX239CNG | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
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