Table 11. Connector Descriptions (Continued)
Connector
Description
REF IN
Currently unsupported. Input terminal for an external reference signal for the
sampling clock of the device. Use the PXI_100 backplane reference as a
reference input.
I+
Differential inputs for the
in-phase signal.
Inputs are MMPX (f) connectors with 50 Ω output
impedance. Both I+/- and Q+/- components present
a differential 100 Ω load with a common mode
voltage of 0 V. For single-ended orientation, use the
positive input while providing 50 Ω termination to
the negative component. Differential operation is
recommended for best performance. When
connecting to the PXIe-3620, connect MMPX (m)-
to-MMPX (m) cables to the corresponding TX
connectors.
I-
Q+
Differential inputs for the
quadrature-phase signal.
Q-
Table 12. LED Indicators
LED
Description
Color
State
Indication
ACCESS Indicates if the ADC within the
module is powered.
OFF
—
The ADC is not powered.
Green Solid
The ADC is powered and
ready for normal
operation.
ACTIVE Indicates the configuration status
of the module.
OFF
—
The ADC is not powered.
Yellow Blinking The module is being
configured.
Green Solid
The ADC is operating.
66
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mmWave Transceiver System Getting Started Guide
