07 | Keysight | L4490A/91A RF Switch Platform – Data Sheet

Switch Management

Switch sequences allow you to define and

control complex signal paths with user as-

signed names. Sequences can be nested

and called from your program. Up to 500

sequences can be defined and stored in

non-volatile memory so when power is

lost, the sequences are not. Use sequenc-

es and the break-before-make features

to ensure switch closures are made in the

right order and eliminate possible damage

to your valuable DUTs or test equipment.

See Figure 6.

Switch counts are also stored in the

instrument’s non-volatile memory. So you

can monitor when a a switch is nearing its

end-of-life.

Additionally, power up/down states can

be identified and stored in non-volatile

memory, protecting the DUT when power

is lost.

Graphical Web Interface

The built-in graphical web browser inter-

face provides remote access and control

of the instrument via a Java-enabled

browser such as Internet Explorer. Using

the web interface, you can set-up, trouble-

shoot and maintain your instrument from

anywhere on the network. See Figure 7.

– View and modify instrument setup

– Configure switch/attenuator channels

– Open or close switches

– Send, receive and view SCPI

commands

– Define and execute switch

sequences

– View error queue

– Get status reports on relay cycle

counts, firmware

revisions and more

Figure 7. The web interface makes it easy to set up, troubleshoot and maintain your test remotely.

Figure 6: L4490A/91A switch sequences developed/executed from the Web interface or programming

environment