Monitoring The Test Signal Level (Ac); Monitoring The Test Signal Level On A Real-Time Basis - Agilent Technologies 4294A Operating Manual

Monitoring the Test Signal Level (AC)

You can set a constant signal level through the keystroke sequence
also set the signal level for each measuring point within the range of the signal source level
sweep by pressing the
to the output signal level of the Agilent 4294A's internal oscillator. In most cases, however,
the signal level actually applied to a DUT differs from the setting applied to the signal
source because some electrical loss occurs between each test terminal and the DUT.
The Agilent 4294A provides a feature that allows you to monitor both the voltage and
amperage values of the test signal level actually applied to the DUT, whether you measure
the signal source level by voltage or current. This feature is called "test signal level
monitor."

Monitoring the Test Signal Level on a Real-time Basis

For real-time monitoring, the Agilent 4294A provides two fields in the lower area of the
LCD: the Test Signal Voltage Level Monitor field (labeled "VAC") and the Test Signal
Current Level Monitor field (labeled "IAC"). These fields are updated each time a
measuring point is reached during the sweep cycle.
Step 1. Press the
Step 2. Press the
this key toggles your selection).
Softkey Labels
OSC MON ON off
OSC MON on OFF
Step 3. If the sweep cycle is currently in the hold state, specify the number of sweep cycles (see
"Specifying Sweep Times and Stopping Sweep" on page 114) and then start testing the
DUT by specifying the trigger source (see "Selecting a Method to Start Measurement
(Trigger Source)" on page 111). Alternatively, you can use the continuous sweep mode by
implementing a free run trigger.
NOTE
The Agilent 4294A does not monitor the test signal level until you start testing the DUT.
Using the test signal level monitor feature in conjunction with a manual sweep allows you
to both determine the characteristic value and monitor the test signal level at your desired
measuring point. For more information on manual sweep, refer to "Manual Sweep
(Measurement at a Specified Point)" on page 100.
Once you have turned on or off the test signal level monitor feature, that setting is applied
to both Traces A and B.
Chapter 7
Setting Up the Display of Measurement Results
, ,
[Start] [Stop] [Center]
key to display the Display menu.
[Display]
key to turn on the test signal level monitor feature (pressing
OSC MON on OFF
Monitoring the Test Signal Level (AC)
[Source] - LEVEL
, and keys. All these settings are related
[Span]
Description
Indicates that the test signal level monitor
feature is enabled.
Indicates that the test signal level monitor
feature is disabled.
and
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