Novatel Connecting Data Communications Equipment, DL-V3 Power Down and the Power Button

Installation and Setup Chapter 2

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

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