User Manual

3.3 Model 8938 FFT Analog Unit Settings
48
3.3 Model 8938 FFT Analog Unit Settings
9
([One Ch] Page of Channel Setting Screen)
7
Execute to adjust inpu
t
signal offset.
(
⇒ p. 76)
12 3
4
5
8
6
Setting Procedure
Use the CURSOR keys to move among items. Select a setting with the F1 to F8 keys.
Step
Setting Item
Description
1
Select the module No.
[Unit ]
Select the number of the input module to set up.
("Channel Configuration" (
⇒ p. 15))
2
Select the channel No.
[Ch ]
Select the channel number on the input module.
3
Confirm the input module and mea-
surement mode
[Module]
[Mode]
Confirm that the display is set for [FFT].
Confirm that the display is set for [Voltage].
4
Select the measurement range
[Range]
Select the appropriate measurement range. The setting val-
ue is the units per division on the vertical axis.
The RANGE/POSN knob selects the range (
⇒ p. 64).
Refer to the specifications for available ranges (
⇒ p. 90).
5
Select the input coupling method
[Coupling]
Select the coupling method for input signals (⇒ p. 65).
[ DC, AC or GND ]
6
Select the low-pass filter
[LPF]
To suppress high-frequency components, select a low-pass
filter within the input module (
⇒ p. 66).
[ Off, 5Hz, 500Hz, 5kHz or 100kHz ]
7
Select the probe attenuation
[Probe]
Select according to the cable or probe being used
(
⇒ p. 75).
[ 1:1, 10:1, 100:1 or 1000:1 ]
8
Set the anti-aliasing filter
[AAF]
Turn this on to suppress anti-aliasing distortion, such as for
FFT analysis (
⇒ p. 67).
[ Off or On ]
9
Perform zero adjustment
[ Zero-Adjust ]
Perform at least 30 minutes after turning power on
(
⇒ p. 76).
Set up scaling
Set as occasion demands.
See
"5.4 Converting Input Values (Scaling Function)" in the
Instruction Manual