Jp2 : D/A Int/Ext Ref Voltage Selection; Jp3 : Single-Ended/Differential Selection - Omega ISA- BUS MULTI-FUNCTIONAL BOARD OME-A822PG Hardware Manual

2.3.2 JP2 : D/A Int/Ext Ref Voltage Selection

Ch 1 = INT
Ch 2 = INT
(default)
Ch 1 = INT
Ch 2 =EXT
(ExtRef2)
If JP2 is set to internal reference, then JP1 should be set to -5V or -10V internal reference
voltage.
If JP2 is set to external reference, then ExtRef1, CN3 pin 31, is the external reference
voltage for D/A channel 1. and ExtRef2, CN3 pin 12, is the external reference voltage for
D/A Channel 2.

2.3.3 JP3 : Single-ended/Differential Selection

Single-ended
(default)
The OME-A-822PGL/PGH offers 16 single-ended or 8 differential analog input channels.
The JP3 jumper sets the inputs to single-ended or differential mode. You can not select
single-ended and differential simultaneously.
Refer to Sec. 2.9 first.
JP2(vref)
JP2(vref)
SINGLE
DIFF
OME-A-822PGL/PGH Hardware Manual ---- 12
Ch 1 =EXT JP2(vref)
(ExtRef1)
Ch 2 =EXT
(ExtRef2)
JP2(vref)
Ch 1 =EXT
(ExtRef1)
Ch 2 = INT
Differential SINGLE
DIFF