User`s guide

RIGOL Chapter 2 Front Panel Operations
2-36 M300 User’s Guide
Totalizer
The multifunction module provides four 32-bit totalizers (TOT) which can count TTL
pulses at a 10 MHz rate (for high-speed TOT channels) or 100 kHz rate (for normal
TOT channels). You can manually read the TOT count or you can read the TOT count
automatically by configuring the TOT channels to a scan list via the channel
configuration guide.
The TOT channel configuration guide contains “Measurement Configuration”, “Alarm
Configuration” and “Advanced Configuration”. For alarm configuration, refer to
“Alarm Configuration”. This section introduces the parameters to be set in
“Measurement Configuration” and “Advanced Configuration” for the TOT channels.
1 Chan No.
Enter the first step of the channel configuration guide. Use the up/down
direction keys to select Chan No. and use the numeric keyboard to input or use
the left/right direction keys to select the desired channel number.
Generally, the TOT channels are numbered “S05” to “S08” where S denotes the
current slot number of the multifunction module. “S05” and “S06” are
high-speed TOT channels and can count TTL pulses at a 10 MHz rate. “S07” and
“S08” are normal TOT channels with 100 kHz count rate.
2 Function
After selecting the correct channel number, Function is fixed at “TOT” and
users cannot modify it.
3 Status
Use the up/down direction keys to select Status and use the left/right direction
keys to select the desired status.
 READ: configure the current TOT channel to the scan list. During a scan,
the instrument can read the current TOT count.
 OFF: do not configure the current TOT channel to the scan list. You can start
and stop the counting or read the count of the TOT channel manually.
Please refer to the introduction in “To Control MC3534”.
4 TrigMode
When the channel status is READ, use the up/down direction keys to select
TrigMode and use the left/right direction keys to select the desired mode.
 Rising: configure the totalizer to count on the rising edge of the input signal
when the input signal passes through the trigger threshold.
 Falling: configure the totalizer to count on the falling edge of the input
signal when the input signal passes through the trigger threshold.
Note: the “TrigMode” here refers to the mode in which to trigger the counting of
the totalizer. Please pay attention to distinguish it from the “TrigMode” of the