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Installation and Setup Chapter 2
DL-V3 User Manual Rev 3 33
DL-V3 Power Down and the Power Button
DL-V3 incorporates a power button on its front, see Figure 13 below. Pressing this switch, sends a
signal to the microprocessor to turn on or off the GNSS receiver.
Figure 13: Power Button
The DL-V3 has a low-power mode called power-down mode. To enter this low-power mode, press the
power button for at least three but no more than seven seconds, then release it. This is also the mode
the receiver enters into after applying power. In the power-down mode, all logging is disabled.
While power consumption in power-down (sleep) mode is minimal, less than 10 mA, the DL-V3 is
not completely off. If power conservation is important in your application, disconnect the power
source from the DL-V3 when it is not in use.
Press the power button momentarily to turn the DL-V3 back on. Also, the DL-V3 monitors its COM1
and COM2 serial ports. Power-up is triggered on these ports by a DC level of at least +5 V on either
RX or TX. The receiver does not detect activity on COM3. For example, if a key is pressed on a
handheld data logger that is plugged into COM1 or COM2, the time required to come on is only a few
seconds. However, it may require an additional few minutes to establish an initial time and position.
During power-down and power-up time, the serial ports do not process data. You must wait until the
receiver outputs an RXSTATUSA log with a BOOTOK message before typing any commands. Ensure
that your host application (especially Windows) does not poll these COM ports periodically to cause
an accidental power-up.
The automatic power-down feature is disabled when logging is in progress. However, if the power
button is pressed while the DL-V3 is logging data autonomously, the DL-V3 saves any open data files
and then goes into power-down mode.
An additional function of the power button is that it resets the DL-V3 if it is held depressed for at least
10 seconds. This system reset clears stored logging parameters and reverts to a factory configuration
when the power button is released.
2.1.10 Connecting Data Communications Equipment
In order to communicate with the receiver by sending commands and obtaining logs, a connection to
some form of data communications equipment is required. In the case of the DL-V3, your PC/laptop
can also communicate with the receiver using the Bluetooth interface. The default configuration
available is shown in Table 5, below, and its pin-out table is in Appendix A on Page 76.
Table 5: Default Serial Port Configurations
Receiver COM1 COM2 COM3 AUX USB
DL-V3 RS-232 RS-232 Bluetooth or Ethernet RS-232 USB