Murata Electronics North America DNT500P User Manual

DNT500

Figure 5.4.2

There are three serial connectors on the interface boards, as shown in Figure 5.4.3. The
RJ-45 connector provides a high-speed RS232 interface to the DNT500P’s main serial
port. The USB connector provides an optional interface to the radio’s main serial port.
The RJ-11 connector provides a high-speed RS232 interface to the radio’s diagnostic
port. The DNT500 Wizard utility program runs on the radio’s main port.

Figure 5.4.3

 2008 by RF Monolithics, Inc. 40 M-0500-0000 Rev D

DNT500

The preferred PC interface is a serial port card capable of operating up to 460.8 kb/s.
Many desktop PCs have a built-in serial port capable of operation at 115.2 kb/s. The kit
can be run satisfactorily at the 115.2 kb/s data rate, but not at its fastest throughput. Use
the RJ-45 to DB-9F cable assemblies for serial port operation.

Optionally, the kit can be run from the USB port. Plugging in the USB cable automati­cally switches operation from the RJ-45 connector. The USB interface is based on an
FT232RL serial-to-USB converter IC manufactured by FTDI. The driver files for the
FT232RL are located in the USB Driver folder on the kit CD, and the latest version of the
driver can downloaded from the FTDI website, www.ftdichip.com

. The driver creates a
virtual COM port on the PC. Power up an interface board with an installed DNT500P us­ing one of the supplied wall plug power supplies. Next connect the interface board to the
PC with a USB cable. The PC will find the new USB hardware and open up a driver in­stallation dialog box. Click on the Browse button in the dialog box and point to the folder
with the FT232R driver files. The driver installation dialog will run twice to complete the
FT232R driver installation.

5.5 DNT500 Wizard Utility Program

The DNT500 Wizard utility program is located in the PC Programs folder on the kit CD.
The Wizard requires no installation and can simply be copied to the PC and run. The
Wizard start-up window is shown in Figure 5.5.1.

Figure 5.5.1

Press the Connect button to open the serial port dialog box, as shown in Figure 5.5.2. Set
the data rate to 115.2 kb/s (DNT500 default), select the COM port connected to the
DNT500 interface board and press OK.

 2008 by RF Monolithics, Inc. 41 M-0500-0000 Rev D

DNT500

Figure 5.5.2

At this point the Wizard will collect configuration parameters from the DNT500. This
data is organized under the first seven tabs, each corresponding to a Bank of register pa­rameters as discussed in Section 4.2. The Transceiver Setup Tab as shown if Figure 5.5.3,
and corresponds to Bank 0. The current values of each Bank 0 parameter are displayed
and can be updated by selecting from the drop down menus or entering data from the
keyboard, and then pressing the Apply button. Note that data is displayed and entered into
the Wizard in Big-Endian order. The Wizard automatically reorders multi-byte data to
and from Little-Endian order when building or interpreting protocol messages. In Figure

5.5.3 below, TX Power has been modified from its default value of 0 dBm to 18 dBm.

Figure 5.5.3

In addition to conventional mouse and keyboard inputs, the Wizard supports two special
function keys, F1 and F2. F1 toggles the serial port DTR line off and on. Pressing F1 the

 2008 by RF Monolithics, Inc. 42 M-0500-0000 Rev D