Tektronix KEITHLEY 707B, Reference Manual, Page: 250 / 534

Models 707B and 708B Switching Matrix Reference Manual Section 7: TSP command reference
707B-901-01 Rev. B / January 2015 7-19
In general, the settling time of single commands that open and close switch channels depends on
several factors, such as card type and channel numbers. However, the opening and closing of two
sequential channels including no others can be guaranteed as follows:
•
channel.BREAK_BEFORE_MAKE
open settle time + close settle time
•
channel.MAKE_BEFORE_BREAK
close settle time + open settle time
•
channel.OFF
maximum of open settle time or close settle time
This behavior is also affected by
channel.connectsequential
and any additional user delay
times.
Make-before-break (also known as hot switching) can dry-weld reed relays so that they will
always be on. Hot switching is recommended only when external protection is provided.
Example
channel.connectrule = channel.BREAK_BEFORE_MAKE Sets the connect rule in the instrument to
channel.BREAK_BEFORE_MAKE
Also see
channel.connectsequential (on page 7-19)
channel.exclusiveclose() (on page 7-22)
channel.exclusiveslotclose() (on page 7-23)
scan.background() (on page 7-139)
scan.execute() (on page 7-142)
channel.connectsequential
This attribute controls whether or not channels are closed sequentially.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (RW) Yes Instrument reset
Recall setup Create configuration script channel.OFF
Usage
sequential = channel.connectsequential
channel.connectsequential = sequential
sequential
•
channel.OFF
or
0
: Disable sequential connections
•
channel.ON
or
1
: Enable sequential connections