3-14
Recorder Mode
• Lower - Level - Upper
........................ Specifies the trigger level for the input signal in a range from 0 to 100% (Lower
SPAN limit: 0%, Upper SPAN limit: 100%).
When the Mode setting is
↑
/H or
↓
/L:
Specify one Trigger Level in the range of -100% to +100% in 1% steps (where the
current Range setting's lower limit is -100% and its upper limit is +100%).
Example :When the Range setting is 5V
-5V equals -100%, and +5V equals +100%.
When the Mode setting is Win In or Win Out:
Specify two Trigger Levels in the range of -100% to +100% in 1% steps (where the
current Range setting's lower limit is -100% and its upper limit is +100%). Specify
the upper and lower limits so that the difference between them is at least 5%.
Example :When the Range setting is 5V
-5V equals -100%, and +5V equals +100%.
The Logic setting (only if a logic amp is installed):
X : Excludes the logic amp's channels as trigger channels.
L :Activates the trigger at Low-level signal input.
H :Activates the trigger at High-level signal input.
CHECKPOINT
The permissible range of the logic amp's L and H values varies with the Threshold setting
in the AMP Settings window.
• Trigger Counter....... Can only be set when the Combination setting is Level OR or Level AND. When the
recorder is in trigger armed status, this function can be set to make the recorder
ignore trigger signal input during a fixed interval. This function is provided with a
choice of two parameters, Count and Filt.
Count : Measurement is started when the trigger condition has been satisfied the
specified number of times.
Trigger Condition
Based on the Level OR or
Level AND setting
Sampling Interval
Count setting 3 (times)
: Trigger activated
< Sample >
0%
50%
100%
Measurement starts
CH.1
Trigger level
• Pre-trigger............... This parameter can only be set when the Function setting is Memory. It specifies
the pre-trigger period as a percentage.
CHECKPOINT
• Based on the position where the trigger condition is satisfied as the reference point, the
Pretrigger function initiates data capture before or after that reference point. A Pretrigger
setting of 100% equals the total capture time (the Sampling Interval setting x Block Size
setting).
• The Pre-trigger time when the Capture Destination is the hard disk or PCMCIA card is
calculated using the formulas below. Furthermore, the memory capacity for Pre-trigger
varies according to the memory device used for the capture destination.
– Hard disk pre-trigger memory capacity: 24 MW
– PCMCIA pre-trigger memory capacity : 1 kW
When there is a temperature measurement channel (when TEMP has not been selected
for any channel on the AMP Settings window)
Pre-trigger memory capacity x sampling speed
÷
number of channels
÷
2 = the pre-trigger time
When there is no temperature measurement channel (when TEMP has been selected
for any channel on the AMP Settings window)
Pre-trigger memory capacity x sampling speed ÷ number of channels = the pre-trigger time
Example: Capture to hard disk, 1 µs sampling speed, 8-ch input, voltage only
24 MW x 1 µs ÷ 8 = approx. 3 s
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