Table 1. NI 5691 Front Panel Connectors (Continued)
Connector Access Function
CH 1 IN Input CH 1 IN and CH 1 OUT each function as a programmable amplifier
with switchable main and direct paths. The main path offers fixed gain
amplification in series with a step attenuator that is adjustable in
0.5 dB nominal steps
1
. The direct path bypasses the programmable
circuitry and routes the signal directly to the output. The direct path
passes DC level to output, whereas the main path is AC-coupled.
CH 1 OUT Output
Table 2. NI 5691 Front Panel LED Indicators
LED Indications
ACCESS Indicates the basic hardware status of the NI RF signal conditioning module.
OFF—The module is not yet functional, or has detected a problem with a PXI
power rail.
AMBER—The module is being accessed.
GREEN—The module is ready to be programmed.
ACTIVE Indicates the operational status of the NI RF signal conditioning module.
OFF—The module is in an uninitialized state.
GREEN—The module is in a ready state or in use.
Related Information
Refer to the Devices book in the NI RF Signal Conditioning Devices Help for more
information about using channels and paths.
Configuring the NI 5691 in MAX
Use Measurement & Automation Explorer (MAX) to configure your National Instruments
hardware. MAX informs other programs about which devices reside in the system and how
they are configured. MAX is automatically installed with the NI-5690 instrument driver.
1. Launch Measurement & Automation Explorer (MAX).
MAX should automatically detect the device you installed.
1
Refer to the NI PXI-5691 Specifications for detailed gain specifications.
NI PXI-5691 Getting Started Guide | © National Instruments | 9
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