Section 4: Close-open overview
Series 3700 System Switch/Multimeter User's Manual
4-16
3700S-900-01 Rev. C / July 2008
Channel connection rule: Break-Before-Make, Make-Before-
Break
The channel connect rule is a system-level attribute that determines the order of
opening and closing channels when performing close operations that open and
close multiple relays. This attribute is applicable for electromechanical, reed,
and solid state relay switching modules. The same attribute setting is associated
with all applicable channels in the system.
You can set the channel connect rule to Break-Before-Make (BBM), Make-
Before-Break (MBB), or Off. The default setting is BBM. You can minimize the
settling time for the close operation by setting connect sequential “Off”, which
permits the instrument to initiate close and open operations simultaneously.
NOTE
You cannot guarantee the sequence of open and closure operations
with the channel connect rule set to “Off.” It is highly recommended
that you implement cold switching when the channel connect rule is
set to “Off”.
To set the channel connect rule through the front panel interface:
1. Press the
MENU
key.
2. Use the navigation wheel to scroll to the CHANNEL menu item.
3. Press the
ENTER
key (or the navigation wheel) to display the CONNECT
MENU.
4. From this menu, select the RULE menu item: Use this menu item to set the
rule to BBM, MBB, or OFF.
5. Use the
ENTER
key to apply the selection.
6. Use the
EXIT
key to leave the menu.
To set the channel connect rule through the remote command interface, use the
channel.connectrule
command. Refer to the Instrument Control Library
(ICL) in the Reference Manual for details on the
channel.connectrule
command.