Agilent Technologies E8267D PSG, E8257D PSG manual Data Types, Output Mode, Input Mode

Peripheral Devices

N5102A Digital Signal Interface Module

Data Types

The following block diagram indicates where in the PSG signal generation process the data is injected for input mode or tapped for output mode.

Output

Mode

Pre-FIR

Samples Samples

PSG
Data	FIR	I,Q	RF
Generator	Filtering	DACs	I/Q
			Modulator

Pre-FIRSamples

Samples

Input

Mode

Output Mode

When using an ARB format, the data type is always Samples and no filtering is applied to the data samples.The samples are sent to the digital module at the ARB sample clock rate.

For real- time formats, choosing Samples as the data type will send filtered samples to the digital module at a rate between 50 MHz and 100 MHz. Selecting Pre- FIR Samples, sends unfiltered samples to the digital module at a rate equal to the sample rate of the current format.

Input Mode

When the data type is Samples, the data samples coming through the digital module are injected at a point that bypasses the filtering process.

If Pre- FIR Samples is selected, the data samples are injected before the filtering process. The maximum rate will be determined by the selected filter. Refer to Table 11- 7.

218 Chapter 11