Initial Source Port Control Function - Agilent Technologies ENA Series User Manual

Initial Source Port Control function

Firmware Rev. A.03.54 and later provides an additional feature, "Initial Source Port
Control." It protects the output amplifier inside the instrument against any potential
damage due to transient voltage that may be externally applied. After the firmware is
installed, this feature is activated at power-on. When activated, this feature attenuates the
output signal and turns off the test port LED each time a sweep finishes. At the same time,
it switches the stimulus signal output test port in the trigger hold state to a pre-selected test.
A test port 1 is selected at power-on.
The Init Src Ctrl feature lets you select the stimulus signal output test port in the trigger
hold state. By setting the stimulus signal output test port to a test port which hardly
experience transient voltage, this feature can reduce the possibility that the output
amplifiers of the instrument may be damaged by transient voltage. Transient voltage occurs
when the active DUT is connected or an external DC power supply is turned on. A test port
not used or a test port to which the DUT input terminal is connected can be regarded as a
test port which hardly experience transient voltage. The following table shows the degree
of tolerance to transient voltage of each test with this feature. Connect the DUT so that
transient voltage is not applied to test ports with low tolerance.
Table 13-4
Test Port to select
(Stimulus signal output test port)
When test port 1 is selected
When test port 2 is selected
When test port 3is selected
When test port 4 is selected
We recommended you to use this feature in single measurement (when performing manual
measurement) or :INIT:CONT OFF (when using a program) since the stimulus signal
output destination is switched to the selected test port only in the trigger hold state
Usage:
(When performing manual measurement)
Trigger:
Turning on the Init Src Ctlrl feature:
Specifying the Init Src port:
(When using a SCPI program. Sample program to set Port 1 to Initial Source Port.)
:INIT:CONT OFF
:SYSTem:ISPControl[:STATe] ON
:SYSTem:ISPControl:PORT 1
Chapter 13
Setting and Using the Control and Management Functions
Low tolerance test ports Connected
to the instrument's output
amplifier.(Recommended
connection: test port not used or
DUT input terminal)
Test port 1, test port 3
Test port 2, test port 3
Test port 3, test port 1
Test port 4, test port 1
-Single is recommended.
-Service-Init Src Ctrl [ON]
-Service-Init Src Port [1|2|3|4]
Initial Source Port Control function
High tolerance test ports connected to
50W termination inside the
instrument.(Recommended
connection: DUT output terminal)
Test port 2, test port 4
Test port 1, test port 4
Test port 2, test port 4
Test port 2, test port 3
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