National Instruments PXIe-5665, Getting Started Manual, Page: 21 / 33

Table 8. Device Front Panel Icon Definitions
Refer to the user documentation for required maintenance measures to ensure user
safety and/or preserve the specified EMC performance.
The signal pins of this product's input/output ports can be damaged if subjected to
ESD. To prevent damage, turn off power to the product before connecting cables and
employ industry-standard ESD prevention measures during installation, maintenance,
and operation.
If this device has been in use, it may exceed safe handling temperatures and cause
burns. Allow the device to cool before removing it from the chassis.
Table 9. PXIe-5653 Synthesizer/LO Source Front Panel Connectors
Connector Use
REF IN Routes a frequency reference signal to the RF synthesizer/LO source.
This connector accepts a 10 MHz frequency signal with a maximum
voltage of 2 V
pk-pk
.
REF OUT
(10 MHz)
Routes a frequency reference signal from the synthesizer/LO module
onboard 10 MHz oven-controlled crystal oscillator (OCXO).
REF OUT
(100 MHz)
Connects to the CLK IN connector on the PXIe-5622 front panel.
This connector routes a frequency reference signal from the synthesizer
onboard 100 MHz OCXO.
LO1 OUT Connects to the LO1 IN connector on the PXIe-5603 or PXIe-5605
module front panel.
This connector is the output terminal for the LO1 (3.2 GHz to 8.3 GHz)
source. LO1 OUT is an SMA connector with an impedance of 50 Ω
(nominal).
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