HP 54620A - To Measure Setup Time

To measure setup time
Setup time is usually defined as the time for which a data input to a clocked
device must remain stable before the active edge of the clock occurs.
Violating the setup time specification of a device can lead to unstable circuit
operation. You can use the Setup Time measurement in the HP 54620A/C to
verify that your circuit design meets the device specifications.
1
Press
Dual Channel
.
2
Press the
Setup
softkey.
3
Press the softkey under the heading
Data
to highlight the data
channel.
The data channel is the channel for which you want to measure setup time.
4
Select the data channel by using the Entry knob or Select knob, or by
repeatedly pressing the
Data
softkey.
5
Press the
Clock
softkey to highlight the clock channel.
The clock channel is the reference point for the setup time measurement.
That is, the setup time is the time between a transition on the data channel
and a subsequent transition on the clock channel.
6
Select the clock channel by using the Entry knob or Select knob, or
by repeatedly pressing the
Clock
softkey.
7
Select whether the measurement should be referenced to the rising
or falling edge of the clock signal by pressing the
Edge
softkey to
highlight the positive or negative edge symbol.
You must select the desired channels and clock edge before pressing the
Meas Setup
softkey to start the measurement in the next step.
8
Press
Meas Setup
.
The setup time appears on the message line of the display.
You may repeat the above steps as desired to measure the setup time
between different sets of input channels. The three most recent single- or
dual-channel measurements (of any kind) will be shown on the message line
of the display.
To calculate the setup time, the analyzer measures the time between the first
transition of the selected type (rising or falling) on the clock channel and the
nearest previous transition on the data channel. A glitch on the data channel
will be considered a transition for measurement purposes.
Making Analyzer Measurements
To measure setup time
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