Lambda SR1, Operation Manual, Page: 11 / 317

Getting Started 11
© 2014 Stanford Research Systems
Digitizer (Optional)
The optional digitizer digitizes the digital audio carrier signal at an 80 MHz sampling rate. The digitizer
calculates the overall clock rate of the signal as well as jitter as a function of time and probability
density for pulse width, pulse amplitude, input amplitude, and jitter amplitude. The digitizer also
calculates the spectra of both the carrier signal as well as the jitter signal. Finally the digitizer calculates
an eye diagram which shows the probability of the carrier signal as a function of amplitude and time. The
off-line measurements made by the digitizer complement the real-time jitter measurement capabilities of
the Jitter Analyzer.
Remote Interfacing
SR1 Supports a variety of remote interfaces:
IEEE-488.2 (GPIB)
SR1 has a rear-panel IEEE-488 connector and fully supports the IEEE-488.2 standard. All instrument
features can be set and queried from the remote interface.
Serial
GPIB commands may also be sent over the rear-panel serial connector which supports baud rates up to
115.2 kBaud.
TCP/IP
GPIB commands may also be sent over a TCP/IP network via the rear-panel ethernet connector. SR1
follows the VXI-11 standard for the transmission of commands over TCP/IP.
COM
SR1 is fully COM enabled allowing applications such as Visual Basic to set and query instrument
internals. COM enabled applications may also control and query the instrument remotely over ethernet.
Not that firewall settings may need to changed to fully enable this functionality.