User Manual

5700/5800 GPS Receiver User Guide 59
General Operation 3
5700 Operation
3.9.2 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 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 Trimble Survey Controller, and
you are using an external radio, the software automatically enables
power output on Port 3.
3.9.3 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 5700 receiver, Trimble recommends that you
use WinFLASH. For more information, see WinFLASH Software,
page 83.
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Warning – Upgrading the firmware deletes all application files on the
5700 receiver.
An alternative method of upgrading your firmware is to copy the .elf
file directly to the CompactFlash card from your computer.
To do this:
1. Connect the CompactFlash card to your desktop computer.
2. Using Windows Explorer, copy the .elf file from your computer
to the CompactFlash card.