User Manual

Appendix 2 Reference
A19
Appendix
Even for the same record length and number of channels, there are cases where file size may be different because of dif-
ferent Sheet settings and input module types.
Refer to "File Sizes"(
⇒ p. 253) for information about the sizes of files for settings and screen image files.
Waveform File Size Calculation Method ____________________________
Appendix 2.2 Waveform File Sizes
References
File Type Operating Function Calculation Method 8860 8861
MEM File Memory Function (
⇒ p. A19) (⇒ p. A22) (⇒ p. A23)
REC File Recorder Function (
⇒ p. A20) (⇒ p. A24) (⇒ p. A24)
RSM Files
Real-Time Saving Function
(
⇒ p. A20) (⇒ p. A25)
RSR Files (
⇒ p. A20) (⇒ p. A25)
FFT File FFT Function (
⇒ p. A20) (⇒ p. A26)
TXT File
Memory Function (
⇒ p. A21) (⇒ p. A27) (⇒ p. A28)
Recorder Function (
⇒ p. A21) (⇒ p. A29) (⇒ p. A30)
Real-Time Saving Function (
⇒ p. A21) (⇒ p. A27) (⇒ p. A28)
FFT Function (
⇒ p. A21) (⇒ p. A31)
MEM Files
File size (bytes) = settings size
*1
+ data size
*2
*1 Settings size = 100560 + analog channel portion + logic channel portion
Analog channel portion = 1104 × saved analog channels
Logic channel portion = 3584 × saved logic channels (0: none saved / 4: saved)
*2. Data size = data size of Timebase 1 + data size of Timebase 2
Data size of Timebase 1 = Samples on Timebase 1 × (2 × saved channels on Timebase 1
*3
)
Samples on Timebase 1 = Recording Length × 100 + 1
(Example: If the Recording Length is 25 divisions, 25 × 100 + 1 = 2501)
Data size of Timebase 2 = 11672 + samples on Timebase 2 × (2 × saved channels on Timebase 2)
Samples on Timebase 2 = Samples on Timebase 1 × ratio of sampling periods on the second and first Time
Axes + 1
(Example: If there are 2501 samples on Timebase 1, and if the sampling period of Timebase 1 is 1 ms/S and
the sampling period of Timebase 2 is 10 ms/S, then 2501 × (1/10) + 1 = 251)
*3. Saved channels: Logic channels A to D count as one channel, regardless of the actual number of channels
used. When logic channels are not used, they are counted as zero.
(Example: When analog channels Unit 1 – Ch 1, Unit 1 – Ch 2 and logic channels A and B are stored, the
number of saved channels is 3)