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GDS-1102A-U
Page 63 (Adding, Subtracting or Multiplying Signals)
GW Instek GDS-1102A-U - Adding, Subtracting or Multiplying Signals
145 pages
Manual
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MEASUREMENT
63
FFT RMS
Performs a FFT
RMS calcul
ation on a sig
nal. RMS
is similar to FFT,
however t
he amplitude is
calculated a
s RMS and
not dB. Four types
of FFT
windows are ava
ilable: Hanning, Flatt
op,
Rectangular, a
nd Blackman.
Hanning FFT
window
F
requency
resolution
Good
Amplitude resolut
ion
Not good
Suitable for
....
Frequency measure
ment o
n
periodic wavefor
ms
Flattop FFT
window
F
requency
resolution
Not good
Amplitude resolut
ion
Good
Suitable for
....
Amplitude mea
surement o
n
periodic wavefor
ms
Rectangular FFT
window
F
requency
resolution
Very good
Amplitude resolut
ion
Bad
Suitable for
....
Single-shot p
henomenon
(this mode is the sa
me as
having no wind
ow at all)
Blackman FFT
window
F
requency
resolution
Bad
Amplitude resolut
ion
Very good
Suitable for
....
Amplitude mea
surement o
n
periodic wavefor
ms
Adding, subtracting or multiplying signals
Procedure
1.
Ac
tivate both CH1 and
CH2.
CH
1
CH
2
2.
Press the Math key.
M
A
TH
62
64
Table of Contents
Main Page
Table of Contents
3
Safety Instructions
8
Safety Symbols
8
Safety Guidelines
9
Power Cord for the United Kingdom
12
Getting Started
13
Main Features
13
Panel Overview
15
Front Panel
15
Rear Panel
18
Display
19
Setting up the Oscilloscope
20
Quick Reference
23
Menu Tree and Shortcuts
23
CH1/CH2 Key
24
Cursor Key 1/2
25
Cursor Key 2/2
25
Display Key
26
Autoset Key
26
Hardcopy Key
26
Help Key
27
Horizontal Menu Key
27
Math Key 1/2 (+/-/X)
28
Math Key 2/2 (FFT/FFT Rms)
29
Measure Key
30
Run/Stop Key
30
Save/Recall Key 1/10
31
Save/Recall Key 2/10
31
Save/Recall Key 3/10
32
Save/Recall Key 4/10
32
Save/Recall Key 5/10
33
Save/Recall Key 6/10
33
Save/Recall Key 7/10
34
Save/Recall Key 8/10
34
Save/Recall Key 9/10
35
Save/Recall Key 10/10
35
Trigger Key 2/6
36
Trigger Key 1/6
36
Trigger Key 3/6
37
Trigger Key 4/6
37
Trigger Key 5/6
38
Trigger Key 6/6
38
Utility Key 1/10 (Utility #1)
39
Utility 2/10 (Utility #2)
39
Utility Key 3/10 (Utility #3)
40
Utility Key 4/10 (Hardcopy -Save All)
40
Utility Key 5/10 (Hardcopy -Save Image)
41
Utility Key 6/10 (Probe Compensation)
41
Utility Key 7/10 (Go-Nogo)
42
Utility Key 8/10 (Data Logging 1/2)
42
Utility Key 9/10 (Data Logging 2/2)
43
Utility Key 10/10 (Self CAL Menu)
43
Default Settings
44
Built-In Help
45
Measurement
46
Basic Measurements
46
Activating a Channel
46
Using Autoset
47
Running and Stopping the Trigger
49
Changing the Horizontal Position and Scale
50
Changing the Vertical Position and Scale
51
Using the Probe Compensation Signal
52
Automatic Measurements
54
Measurement Items
54
Automatic Measurement Gating
56
Automatically Measuring the Input Signals
57
Cursor Measurements
60
Using the Horizontal Cursors
60
Using the Vertical Cursors
61
Math Operations
62
Overview
62
Adding, Subtracting or Multiplying Signals
63
Using the FFT Function
64
Go No-Go Testing
66
Overview
66
Edit: Nogo When
67
Edit: Source
67
Edit: Nogo Violation Conditions
68
Edit: Template (Boundary)
68
Run Go-Nogo Tests
72
Data Logging
73
Overview
73
Edit: Source
74
Edit: Setup Parameters
74
Run Data Logging
76
Configuration
77
Acquisition
77
Selecting the Acquisition Mode
77
Selecting Delay Mode
79
Real Time Vs Equivalent Time Sampling Mode
81
Display
82
Selecting Vector or Dot Drawing
82
Accumulating the Waveform
82
Adjusting the Display Contrast
83
Selecting the Display Grid
83
Horizontal View
84
Moving the Waveform Position Horizontally
84
Selecting the Horizontal Scale
84
Selecting the Waveform Update Mode
85
Zooming the Waveform Horizontally
86
Viewing Waveforms in the X-Y Mode
87
Horizontal Adjustment Menu
88
Vertical View (Channel)
90
Moving the Waveform Position Vertically
90
Selecting the Vertical Scale
90
Selecting the Coupling Mode
90
Expand Vertical Scale Center / Ground
91
Inverting the Waveform Vertically
92
Limiting the Waveform Bandwidth
93
Probe Attenuation Level and Type
93
Trigger
95
Trigger Type
95
Trigger Parameter
95
Configuring Holdoff
97
Configuring the Edge Trigger
98
Configuring the Video Trigger
99
Configuring the Pulse Width Trigger
100
Manually Triggering the Signal
102
Remote Control Interface
103
System Settings
104
Selecting the Language
104
Viewing the System Information
104
Save/Recall
106
File Structures
106
Display Image File Format
106
Waveform File Format
106
Setup File Format
109
Using the USB File Utilities
110
Quick Save (Hardcopy)
112
Save
114
File Type/Source/Destination
114
Saving the Panel Settings
115
Saving the Waveform
116
Saving the Display Image
118
Saving All (Panel Settings, Display Image, Waveform)
119
Recall
121
File Type/Source/Destination
121
Recalling the Default Panel Settings
122
Recalling a Reference Waveform to the Display
123
Recalling Panel Settings
123
Recalling a Waveform
124
Recall Image
126
Maintenance
128
Vertical Resolution Calibration
128
Probe Compensation
129
Faq
131
The Input Signal Does Not Appear in the Display
131
I Want to Remove some Contents from the Display
131
The Waveform Does Not Update (Frozen)
132
The Probe Waveform Is Distorted
132
Autoset Does Not Catch the Signal Well
132
I Want to Clean up the Cluttered Panel Settings
132
The Saved Display Image Is too Dark on the Background
132
The Accuracy Does Not Match the Specifications
133
The Oscilloscope will Not Allow a 2M Waveform to be Saved
133
Appendix
134
Fuse Replacement
134
GDS-1000A-U Series Specifications
135
Model-Specific Specifications
135
Common Specifications
136
Probe Specifications
138
GDS-1072A-U Probe
138
GDS-1102A-U Probe
138
GDS-1152A-U Probe
139
Dimensions
140
EC Declaration of Conformity
141
Index
143
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