MR8740、MR8741_user_manual_eng_20191016H.pdf - 第358页

17.2 Measurement Functions 346 17.2 Measurement Functions 17.2.1 Memory Function Timebase 5, 10, 20, 50, 100, 200, 50 0  s/div 1, 2, 5, 10, 20, 50, 100, 200, 500 ms/div 1, 2, 5, 10, 30, 50, 100 s/div 1, 2, 5 min/div Tim…

100%1 / 428
17.1 General Specifications of the Instrument
345
Chapter 17 Specifications
16
17
External Interfaces
LAN
USB
DVI Interfaces
Modules/Waveform Display
*1:When an LCD monitor is connected or when displaying the Waveform screen via a computer using
the HTTP function
Accessories/Options
No. of ports MR8740: 2 (1 port for each block)
MR8741: 1
Compliant standards IEEE802.3 Ethernet 100BASE-TX, FTP server, HTTP server
Connector RJ-45
Maximum cable length 100 m
No. of ports MR8740: 4 (2 ports for each block)
MR8741: 2
Compliant standards USB2.0compliant
Host Connector: Series-A receptacle
Connecting device: USB memory stick, Mouse
No. of ports MR8740: 2 (1 port for each block)
MR8741: 1
Resolution SVGA (800 × 600)
Connector DVI-D (for digital)
Measurement mode Module model-dependent
Measurement range Module model-dependent
Input coupling Module model-dependent
Low-pass filter Module model-dependent
Displayed graphs*
1
On-screen settings for displayed graphs and multi-graph printing (up to 16 graphs)
Waveform display*
1
Select Off, or from 16 colors
Waveform display position*
1
in increments of 1%
Preset (ascending, descending, 0%, 50%)
Zero adjust All channels and ranges together
Waveform display magnifica-
tion*
1
Horizontal axis (Time axis): ×10, ×5, ×2, ×1, ×1/2, ×1/5, ×1/10, ×1/20, ×1/50, ×1/100, ×1/200,
×1/500, ×1/1000, ×1/2000, ×1/5000, ×1/10000, ×1/20000
Vertical axis (Voltage axis): ×100, ×50, ×20, ×10, ×5, ×2, ×1, ×1/2, ×1/5, ×1/10
Variable display function*
1
Specified by upper and lower limit values, by displayed amplitude per division
Scaling Automatic scrolling (10:1, 100:1, 1000:1, selectable for different attenuating probes)
Manual scrolling (conversion ratio setting, two-point setting and unit settings)
Invert function Polarity reversal
Vernier function Included
Commenting Alphanumeric and Japanese characters (title, each analog channel, and each logic channel)
Comment entry method Single character, stored string and historical string entry (pre-stored and previously used strings
can be recalled, inserted and edited)
Copy channel settings Copy and paste, or paste all
Logic setting*
1
Width: Selectable from three types: wide, standard, and narrow
Display position: Freely settable in increments of 1%
Display bits: Off or selectable from among 16 colors, settable individually for each bit
Zoom function*
1
The waveform screen is divided vertically in two, and the lower portion displays zoomed waveforms.
Accessories Instruction Manual .............................................................................................. 1
Application CD..................................................................................................... 1
Power Cord.......................................................................................................... 1
Rack mounting brackets (for EIA standard) ..........................1 set (MR8740 only)
Options For information about options: (p. A10)
17.2 Measurement Functions
346
17.2 Measurement Functions
17.2.1 Memory Function
Timebase 5, 10, 20, 50, 100, 200, 500 s/div
1, 2, 5, 10, 20, 50, 100, 200, 500 ms/div
1, 2, 5, 10, 30, 50, 100 s/div
1, 2, 5 min/div
Time axis resolution 100 points/div
Sampling period 1/100th of timebase
Recording length Fixed recording length: 25, 50, 100, 200, 500, 1000, 2000, 5000, 10000, 20000, 50000, 100000 div
Arbitrary recording length: Can be set in units of divisions (up to 160,000 div)
Screen Settings 1 screen, 2 screens, 4 screens, 8 screens, 16 screens, X-Y 1 screen, or X-Y 4 screens
Interpolation function Line, line and dot (with X-Y)
Waveform scrolling Left-right scrolling is available, Backward scrolling is available during Roll Mode display
Overlay function Automatic: Always overlays when starting, and clears by restarting
Manual: Overlays only necessary waveforms, and clears them as needed
Automatic saving Automatically saves data on USB memory stick after measuring (binary or text)
When sampling is slow, saving starts during recording.
Automatic print Automatically prints data after measurement (Sends print data to PC connected via LAN,
Model 9333 LAN communicator is required.)
Manual print The "Send Print Key" function of Model 9333 LAN communicator is utilized
Report print The "Send Print Key" function of Model 9333 LAN communicator is utilized
17.2.2 Recorder Function
Timebase 10, 20, 50, 100, 200, 500 ms/div
1, 2, 5, 10, 30, 50, 100 s/div
1, 2, 5, 10, 30 min/div, 1 h/div
Time axis resolution 100 points/div
Sampling period 1, 10, 100 s
1, 10, 100 ms (not more than 1/100th of the selected timebase)
Recording length Fixed recording length: 25, 50, 100, 200, 500, 1000, 2000, 5000, 10000, 20000, 50000 div
Adjustable recording length: Can be set in units of divisions (up to 80,000 div)
Continuous
Screen and Printing Settings 1, 2, 4, 8 or 16 screens
Waveform Storage The most recent 80,000 divisions of measurement data is retained in internal memory
Waveform Scrolling Left-right scrolling by Jog and Shuttle knobs. Including backward scrolling during measurement
Automatic saving Automatically saves data on USB memory stick after measuring (binary or text)
When sampling is slow, saving starts during recording.
Manual print The "Send Print Key" function of Model 9333 LAN communicator is utilized
Report print The "Send Print Key" function of Model 9333 LAN communicator is utilized
17.2.3 FFT Function
Frequency range 133 mHz to 8 MHz, external
Dynamic range 72 dB (Theoretical value ), 96dB (Theoretical value)(When the 8968 High Resolution Unit is used)
Number of sampling points 1000 points, 2000 points, 5000 points, 10000 points
Frequency resolution 1/400, 1/800, 1/2000, 1/4000
Anti-aliasing filter Coupled with the frequency range, the cutoff frequency is automatically set.
(Only when using the Model 8968 High Resolution Unit or Model U8979 Charge Unit)
Analysis channel setting Can be selected from desired channels
FFT analysis modes Storage waveform, linear spectrum
*
, RMS spectrum
*
, power spectrum
*
, cross power spectrum,
auto-correlation function, histogram, transfer function, cross-correlation function, impulse response,
coherence function, 1/1 octave analysis, 1/3 octave analysis, LPC analysis, phase spectrum
* The total harmonic distortion (THD) is displayed when the cursor display is ON.
Display formats Single , Dual, Nyquist display, running spectrum display
Window Rectangular window, Hanning, Hamming, Blackman, Blackman Harris, Flat top, Exponential
Display scale Linear, log
17.3 Trigger Section
347
Chapter 17 Specifications
16
17
Peak hold Included
Averaging Time axis, simple average of frequency axis, indexed average, peak hold (frequency axis),
number of times (2, 4, 8, ... 10,000)
Automatic print Automatically prints data after measurement (Sends print data to PC connected via LAN,
Model 9333 LAN communicator is required.)
Manual print The "Send Print Key" function of Model 9333 LAN communicator is utilized
Report print The "Send Print Key" function of Model 9333 LAN communicator is utilized
17.3 Trigger Section
Trigger method Digital comparison
Trigger modes • Single, Repeat, Automatic (Memory function, FFT function)
• Single, Repeat (Recorder function)
Trigger source MR8740: Block I Analog Unit (Ch1 to Ch32), 8 Standard Logic Channels
Block II Analog Unit (Ch1 to Ch22), 8 Standard Logic Channels
MR8741: Analog Unit (Ch1 to Ch16), 16 Standard Logic Channels
Independent trigger criteria settable for each channel
Free-run operation occurs when all trigger types are off.
Manual trigger Trigger operated by the manual trigger key of the Memory HiCorder
Timer trigger Trigger depending on the time and interval settings
External trigger (MR8741 only) External signal is used as trigger.
Trigger criteria AND or OR of each trigger source
Trigger types (analog) • Level Trigger
Set digitally as a voltage value below full-scale
• Voltage Sag Trigger (Drop)
Triggering occurs when peak voltage falls below the specified level (for commercial power).
(for 50/60 Hz commercial power)
• Window Trigger
Upper and lower trigger threshold levels are specified
Triggering occurs when the signal enters or exits the defined threshold range.
• Period Trigger
A trigger period reference voltage level and period range are specified
The period of the signal rising (or falling) through the specified level is measured, and triggering
occurs when the period is outside of the specified range.
• Glitch Trigger
Set voltage level and pulse width (glitch width)
Triggering occurs when the signal pulse width is narrower than the specified pulse width defined
as rising (or falling) through a specified voltage level.
• Event Trigger
Triggering occurs when the event values specified for the level or glitch trigger are exceeded.
Triggering occurs when the input rises above (or falls below) the specified trigger voltage level.
Trigger types (logic) Pattern (mask) trigger by 1, 0, or x (x: don't care)
External trigger
(MR8741 only)
External signal is used as trigger.
Trigger filter OFF, 0.1, 0.2, 0.5, 1.0, 1.5, 2.0, 2.5, 5.0, 10.0 div (Memory function, FFT function)
OFF, ON: 10 ms fixed (Recorder function)
Trigger level resolution 0.1% f.s. (f.s. = 20 div)
Pre-trigger Applicable to memory function or FFT function
% setting: 0, 2, 5, 10, 20, 30, 40, 50, 60, 70, 80, 90, 95, 100, -95%
div setting: Setting by units of 1 div
Trigger priority Off/On
Trigger synchronization
(MR8740)
Synchronization between block I and block II (by using external trigger)
Offset between blocks of the larger value of 1 µs or 3 samples or less
Trigger marker Trigger marks indicate positions of trigger events
Trigger timing Start (All functions), stop (Recorder function), Start & stop (Recorder function)
Trigger Output
(MR8741 only)
Open collector output
With 5 V voltage output, active low, low output level 0 V to 0.5 V (current of 15 mA)
Pulse width for level setting: (sampling rate × number of data points after trigger) or more
Pulse width for pulse setting: 2 ms±1 ms