Keithley DAS-4300 Series, User Manual

Page: 54 / 94

3-20 Setup and Installation
Setting the 100
Ω
Pull-Up to +5 V for the Trigger Input Signal
The trigger input signal of the Trg IO connector has a jumper-selectable
100
Ω
pull-up to +5 V to float the tristate output high. Insert a jumper into
jumper block J501 to provide the 100
Ω
pull-up to +5 V. The 100
Ω
pull-up to +5 V is provided in the solderless component jack, R504. By
default, the jumper is removed.
Setting Grounds
The DAS-4301/8K board provides several jumper-selectable grounds. By
default, each of these grounds is selected (a jumper is inserted in the
appropriate jumper block). Table 3-5 lists the grounds that are
jumper-selectable on the DAS-4301/8K board and their default
configurations. If you want to remove the grounds, remove the jumpers
from their respective locations.
Jumper block J104 is underneath the metal cover on the top right of the
board. To change the jumper setting, you first must unscrew this metal
cover.
Table 3-5. Grounds on the DAS-4301/8K Board
Ground Type Jumper
Used Default
Setting
Analog-to-digital ground
to A/D J102 IN
Analog-to-digital ground
to DC converter J202 IN
Bracket-to-analog ground J104 IN