Intel
®
Ethernet Network Adapter E810-CQDA2T
User Guide
10 722960-002
The optional GNSS module has a connection to an external antenna via an SMB female connector at the
bottom of the faceplate. A cable with an SMB male connector and the characteristics listed in Ta b l e 3
are required to use the GNSS.
The two SMA female connectors on the upper part of the faceplate are used for sending or receiving
timing signals. Cables with SMA male connectors and the characteristics listed in Tabl e 4 are required to
use the SMA ports.
The U.FL cables have similar requirements as the SMA cables, except there is no torque requirement,
and the tested cable length is <1 meter.
Table 3. E810-CQDA2T GNSS Antenna Characteristics
Characteristic Min Typical Max
Characteristic impedance - 50 -
DC operating voltage < 2.9 V 3.3 > 3.6 V
Current consumption - - 30 mA
EMI immunity out-of-band - 30 V/m -
Out-of-band rejection - 40 dB -
Gain of active LNA at E810-CQDA2T SMB
connector
17 dB - 50 dB
Active antenna noise figure - < 4 dB -
Axial ratio - - 2 dB
Phase center variation - < 10 mm over elevation/azimuth -
Group delay variation in-band - 10 ns max at each GNSS system bandwidth -
Table 4. E810-CQDA2T Timing Propagation Cable Characteristics
Characteristic Min Typical Max
Frequency range DC >100 MHz
VSWR - 1.25:1 1.33:1
Velocity of propagation - 69% -
RF shielding -110 dB - -
Capacitance - 95 pF/m -
Impedance, cable - 50 -
Impedance, connector (SMA or u.FL) - 50 -
Tested cable assembly length - - 3 m
SMA connector torque - 0.9 Nm -
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