4
4
INSTALLATION
INSTALLATION
4.1 G
ET
S
TARTED
☑
Connect OUT to the oscilloscope or measurement tool
☑
Always start with a low gain (e.g. x1), never gain x1000
☑
IN and or -IN to AC, GND or DC (depends on application)
☑
Connect the 12 V power supply to “Power”
☑
Connect IN to your source
☑
Use Gain x1000 only, if there is no need for a fuse
4.2 C
ONNECTIONS
TO
THE
AFT400B
Power
Requires 12 V dc, >400 mA
Inner pin is positive.
+IN
non-inverted input
-IN
inverted input
OUT
output of the amplifier
4.3 S
WITCHES
& K
NOBS
AC/GND/DC
... switches the input coupling
type for the two signals +IN and -IN
independently. For single input
configuration, set this switch behind "-IN" to
"GND"
Gain
… switches the total amplification
between x1, x10, x100 and x1000.
IMPORTANT NOTE: the range "x1000"
requires special care.
Bandwidth
... adds low pass filters behind
the amplification stage.
Offset
... for large amplifications (x100 or
x1000), it might be required to DC shift the
OUT signal.
Manual AFT400B – Rev. 1.02 dated 30/09/20 Page 8 (10)
Figure 1: Top View onto the AFT400B
