YOKOGAWA ScopeCorder DL750P, Operation Manual

Page: 16 / 61

IM 701210-07E
15
DSP Channel (/G3 Option)
Chapter 15, “Using the DSP Channel (Optional)” in the User’s Manual Part 2
When the /G3 option is installed, 6 dedicated computation channels (DSP1 to DSP6) are added in addition to the standard analog input
channels (CH1 to CH6). The following computations can be performed in realtime using the output data of the input module as a source
on the DSP (Digital Signal Processor) channels.
• Addition, subtraction, multiplication, and division (+, –,
×
, and
÷
) between channels
• Digital filter (sharp, Gauss, IIR (Butterworth), and moving average)
• Differentiation and integration
• Addition, subtraction, multiplication, and division (+, –,
×
, and
÷
) with coefficients between channels
• Knocking filter
Below are the characteristics of the computation using DSP channels as compared with normal computation.
Acquisition
memory
DSP 6 channels
(DSP1 to DSP6)
Trigger
GIGAZoom engine
Analog input
16 channels
(CH1 to CH16)
Trigger
system
Record length limitation
Maximum sample rate
Trigger source target
Computation during
roll mode display
Applicable modules
Executable computations
Normal Computation (Math1 to Math8)
Exist (Up to 800 kW (when displaying 1 channel))
Maximum sample rate of each module
None
None (computes after waveform acquisition stops)
All modules
Complicated computations and various equations
(Addition, subtraction, multiplication, division,
binary computation, power spectrum, and
user-defined computation (/G2 option)
Computation on DSP Channels (DSP1 to DSP6)
None (same as analog input channels)
100 kS/s
Yes (Only simple trigger and OR trigger/window
trigger of enhanced triggers)
Yes (computed in realtime)
All modules
Comparatively simple computation
(Addition, subtraction, multiplication, division,
digital filter, differentiation, and integration
Comparison of Normal Computation (Math1 to Math8) and Computation on DSP Channels (DSP1 to DSP6)
Analog input
16 channels
(CH1 to CH16)
Main CPU
GIGAZoom engine
Computed
result
• Normal Computation (Math1 to Math8) • Computation on DSP Channels (DSP1 to DSP6)
* A/D : A/D converter
** FF : Flip-flop circuit
* A/D : A/D converter
** FF : Flip-flop circuit
DSP1
FF**
FF**
CH1
A/D*
FF**
CH1
A/D*
Acquisition
memory
Voice Memo & Voice Comment
Section 7.9, “Using the Voice Memo Function” to 13.19, “Using the Voice Comment Function” in the User’s Manual
Voice Memo
By connecting a earphone microphone with a PUSH switch to the
DL750/DL750P, you can record your voice as a memo while
waveforms are being acquired (when in roll mode display). The
recorded voice can be played when the corresponding waveform is
being displayed. The recorded voice memo can be saved along
with the waveform data and can be played from the Voice Memo
menu.
Target waveform
(When in roll
mode display)
Event waveform
Voice memo
Voice memo is also
saved as waveform
data when the
waveform data is saved.
Voice Comment
By connecting a earphone microphone with a PUSH switch to the
DL750/DL750P, you can record a comment on the displayed
waveform using your voice. When saving the screen image data,
the voice comment can also be saved. The maximum length of
voice comment that can be attached to a single screen image data
is 10 s. The saved voice comment can be played from the File
List window of the IMAGE and FILE menus.
• Screen image data • Voice comment data
Record time: 10 s
Data whose
extension is
.PNG, .JPG,
.BMP, or .PS
Data whose
extension is
.NCM, .JCM,
.BCM, or .PCM
Can be saved simultaneously. (Screen image data and voice
comment data are saved as separate files.)