這倪PXI-5651(零件號:779670-01)是3.3 GHz模擬信號發(fā)生器這可以用兼容的框架協(xié)調(diào)信號發(fā)生器，信號發(fā)生器遵循PXI總線的商業(yè)標準即插即用解決方案。這個DDS參考信號提供了頻率合成器的基本微調(diào)步驟；合并的RF循環(huán)步長通常為1 Hz或更低?；绢l率合成器之后是分頻器和乘法器，用于將50 MHz范圍內(nèi)的頻率調(diào)整到的較高頻率范圍PXI-5651信號發(fā)生器。

自動調(diào)平控制(ALC)圈執(zhí)行精細的充分性控制。ALC具有很寬的頻率反應(yīng)，通常從幾千赫茲到大于3.3 GHz。溫度穩(wěn)定型電壓數(shù)模轉(zhuǎn)換器(DAC)設(shè)置ALC的基準電壓。在組裝過程中進行額外的溫度調(diào)節(jié)，使得ALC在預(yù)定的工作溫度下非常穩(wěn)定。衰減器(框架的最后一個方塊)執(zhí)行粗略的振幅控制。這些衰減器的典型范圍為100 dB。

NI-RFSG儀器驅(qū)動器利用存儲在EEPROM中的調(diào)整信息有效地設(shè)置信號發(fā)生設(shè)備。儀器驅(qū)動器利用對準信息來補償非理想元件和溫度變化。

該型號提供-110 dBc/Hz相位噪聲(1 GHz)、10 kHz典型失調(diào)、FM、2-FSK、OOK調(diào)節(jié)、調(diào)制波形(包括正弦、三角形、方形、31排列PRBS)和客戶定制的1020片。這鎳PXI-5651信號發(fā)生器可以使用附近的可調(diào)振蕩器或時鐘源和NI PXI-5660 RF矢量信號分析儀，用于震動刺激響應(yīng)或跟蹤發(fā)電機應(yīng)用。

The NI PXI-5651 (Part Number: 779670-01) is a 3.3 GHz Analog Signal Generator that can coordinate the signal generators, which follow the business standard plug-and-play resolutions for the PXI bus, with compatible frameworks. This DDS reference signal delivers the essential fine-tuning steps of the synthesizer; the incorporated RF recurrence steps are ordinarily 1 Hz or less. Following the fundamental synthesizer are dividers and multipliers to scale the frequency over the scope of 50 MHz to the upper frequency range of PXI-5651 signal generators.

The automatic leveling control (ALC) circle performs fine adequacy control. The ALC has a wide frequency reaction, regularly from a couple of kilohertz to greater than 3.3 GHz. A temperature-stable voltage digital-to-analog converter (DAC) sets the reference for the ALC. Extra temperature adjustment performed amid the assembling procedure makes the ALC extremely stable over the predetermined working temperature. Attenuators (last square of the framework) perform coarse amplitude control. These attenuators have a typical scope of 100 dB.

The NI-RFSG instrument driver included utilizes adjustment information stored in the EEPROM to effectively set up the equipment for signal generation. The instrument driver utilizes alignment information to compensate for nonideal components and temperature variety.

This model offers -110 dBc/Hz phase noise at 1 GHz, 10 kHz typical offset, FM, 2-FSK, OOK regulation, modulating waveforms incorporate sine, triangle, square, 31-arrange PRBS, and client characterized 1020-piece. The NI PXI-5651 Signal Generator can use a tunable nearby oscillator or clock source and a NI PXI-5660 RF vector signal analyzer for jolt stimulus response or tracking generator applications.