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IM AQ1300-01EN
Selecting the Way That Measured Results Are Displayed
There are two transmission methods that can be used depending on the other network device. You
can select the method that the AQ1300/AQ1301 displays measured results with that is suitable for
the other device.
For the different transmission methods, the delay measurement method differs as shown in the
following figures.
• Store&Forward:
The delay of frame signals transmitted in the store and forward method is displayed.
• Cut Through:
The delay of frame signals transmitted in the cut through method is displayed.
Store and Forward Method
The time from when the last bit of the frame signal is received at the input port to when the first bit
of the frame signal is transmitted from the output port is measured as the delay.
Frame transmitted to the other device
Frame received from the other device
Store and forward delay
Time
Cut Through Method
The time from when the first bit of the frame signal is received at the input port to when the first bit
of the frame signal is transmitted from the output port is measured as the delay.
Frame transmitted to the other device
Frame received from the other device
Cut through delay
Time
Test Duration
This is the time that frame signals are transmitted for during a single delay measurement.
Number of Trials
The number of times that delays are measured. For each trial, the delay measurement is performed
for the time specified by the test duration.In one trial, frame signals of the preset frame lengths are
used to perform the delay measurements. The delay is the average of the values from all the trials.
Test Rate
The traffic rate that the AQ1300/AQ1301 uses to measure the delay. You can change the test rate
value. If you have already performed the throughput measurement, you can set the traffic rate to
the measured throughput result.
Pass/Fail Judgment
You can perform pass/fail judgments by setting the delay threshold on the AQ1300/AQ1301 in
advance.If the value exceeds the threshold, a fail judgment occurs.
1.16 RFC2544 Measurement (AQ1300 Option)
