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4
Use Your System
Turning the power on
CAUTION
Battery charging
E6473B high speed direct connect hub
74
Before switching on any system component, ensure that the supply
voltages are in the specified ranges. Refer to
page 141.
• For a portable system, verify that the Direct Connect Hub,
phone, and computer batteries are fully charged before
beginning a survey. Refer to
information.
• For an in-vehicle system, verify that the phone batteries are
fully charged before beginning a survey.
The hub has a three-position power switch (refer to
on page 75). It controls the power to the hub, the phones, and
the scanner or receivers. The blue LED above the power switch
will glow after the Direct Connect Hub has initialized.
• Place the switch in the left position to power the unit on. For
in-vehicle systems, if the hub is powered on and off by an
GPS/DR navigator unit, the switch should be in the left
position.
• Place the switch in the center position to power the unit off.
• For in-vehicle systems without GPS/DR navigator, placing the
switch in the right position allows the unit to power on and
off via the vehicle's ignition switch.
To allow the receiver to lock onto the GPS signal, allow the system to be
NOTE
powered on at least 3 minutes before starting a data collection test.
"System Information"
"Batteries"
on page 55 for more
Agilent E6474A User's Guide
on
Figure 37
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