Chapter 2
NI 5450 Overview
NI PXIe-5450 User Manual
2-18
ni.com
Output Enable
You can disable the analog output signal at the differential channel
connectors by controlling the output enable relay, as shown in the
following figure.
When the output enable relay is disabled, the output signal is connected to
ground through a 50
Ω
resistance. The output enable relay is enabled for
normal waveform generation and connects the differential channel SMA
connectors to the Analog Output path. You can change the output enable
state at any time during waveform generation, and generation continues
internally.
You can enable the output by calling the niFgen Output Enable VI or the
niFgen_ConfigureOutputEnabled
function.
Note
The signal generator uses mechanical relays to switch between the output enable
states. When you change a setting that causes a relay to switch, electromechanical relay
bouncing interrupts the output signal for up to 10 ms.
50
Ω
*
CH 0 +
Output
Enable
50
Ω
CH 0 -
Output
Enable
Analog
Output
Path
Analog
Output
Path
