Keysight 81160A - Page 621

Tutorial
81150A and 81160A User’s Guide 621
Triggered Noise
In triggered mode, the random address generation will be reset to its start
condition whenever the trigger event occurs. This allows to generate the
same random noise sequence again without the need to wait for the
repetition time to elapse.
Gated Noise Mode
In gated mode, the output signal will be blanked when the gate signal is
inactive. The noise source will continue generating random addresses while
the output signal is blanked. Address generation will not be reset on the
inactive to active transition of the gate signal.
PDF
The Keysight 81150A / 81160A has four built-in probability density functions
(PDF) to generate noise signals with a crest factor of 3.1, 4.8, 6.0 and 7.0.
When generating one of the built-in distributions, the noise generation uses
a virtual address that is 46 bit wide and that is mapped to the 19 bit (values
of the 81150A) address bus of the sample memory.
User-defined Noise
distribution
When generating noise with a user-defined distribution, the random address
generation is connected directly to the sample memory as shown below.
Random
Address
Generation
Sample
Memory
Digital
Filter
(FIR)
Waveform
DAC
Address
(19 bits)
Data
Noise without Memory Address Compression