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N4850A

N4850A DigRF v3 Acquisition Probe N4860A DigRF v3 Stimulus Probe

HP => Agilent Technologies 

RF-IC Evaluation (continued)

The logic analyzer enables you

to specify the desired RF-IC

configuration. The specified

configuration is embedded into

DigRF v3 control packets. The

N4860A stimulus probe outputs

DigRF v3-compliant control

packets that configure the RF-IC.

Digital IQ data can be loaded into

the logic analyzer from a variety of

sources, including Signal Studio

and Advanced Design System

(ADS). The logic analyzer embeds

the IQ data in DigRF v3-compliant

packets. The data packets are

transferred to the RF-IC with the

proper timing by the stimulus

probe. The RF-IC processes the

digital IQ data and generates an

RF signal, which is characterized

using a spectrum analyzer.

Control packets, as specified by

the user, can be inserted into the

data packet flow while looping

through the waveform. With this

feature, you can make RF-IC

configuration adjustments – like

the gain setting of the RF

amplifiers – interactively.

Figure 10. Conversion of control bit into DigRF v3 packets

Figure 11. Generation of digital IQ representation of RF signal

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