4 General Operation
36 Trimble R6/R7 GPS and Trimble R8 GNSS Receivers User Guide
Trimble R7 GPS Receiver Operation
48.3 Power output
If the receiver is being supplied with power from an external source, power is
automatically output on Port 1. The output voltage is approximately 0.5 V less than the
input voltage. Port 1 outputs a maximum voltage of 20 V, even if the input voltage is
higher.
You can use GPS Configurator or Trimble Survey Controller software to enable power
output on Port 3. Port 3 can be enabled for power output regardless of whether power
is supplied internally or externally.
On Port 3, the output voltage is approximately 0.5 V less than the input voltage. For
example, if power is being supplied from the internal Lithium-ion batteries, the
maximum battery voltage is 8.4 V, so the maximum output voltage is 7.9 V.
Note – When you start a survey using the Trimble Survey Controller software, and you are
using an external radio, the software automatically enables power output on Port 3.
48.4 Firmware
A receiver’s firmware is the program inside the receiver that makes the receiver run and
controls the hardware. When you need to upgrade the firmware for your Trimble R7
GPS receiver, Trimble recommends that you use the WinFlash utility. For more
information, see The WinFlash utility, page 50.
C
WARNING – Upgrading the firmware deletes all application files on the Trimble R7 GPS
receiver.
An alternative method of upgrading your firmware is to copy the .elf file directly to the
CompactFlash card from your computer:
1. Connect the CompactFlash card to your desktop computer.
2. Using Windows Explorer, copy the .elf file from your computer to the
CompactFlash card.
3. Disconnect the CompactFlash card from your computer and insert it into the
receiver.
4. Turn the receiver off.
5. Hold down
[D] and press [P].
The receiver starts up in Monitor mode, automatically detects the newer version
of the firmware, and installs it. In Monitor mode, the red SV tracking LED is lit
solidly and the yellow Logging/memory LED flashes slowly.
The upgrade takes about two minutes. Once the upgrade procedure is complete,
the receiver restarts automatically.
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