APPLICATION NOTE #2

INTERFACING
KING KDT5000
MOBILE DATA TERMINAL
TO
ESP520DX
DATA RADIO

7030 220th St. S.W.
Mountlake Terrace, WA 98043
(425) 771-2182, FAX: (425) 771-2650
AN-2
REV - B
4/26/99

1. Minimum system requirements:

• 2	-	King MDTs Model #5000 (One will be programmed for base use and the other for a mobile.) Additional setup is required for correct operation - refer to Appendix A for details.
  2	-	SEA ESP520DX Data Radios
  2	-	Radio to MDT interface cables (not supplied). Refer to section 2 for details.
  1	-	PC to MDT interface cable (not supplied). Refer to section 3 for details.
  1	-	PC with 32-bit Windows 95 or NT 4.0 operating system.
  1	-	Software: King Communications CD containing WinDispatch program and document files. Also updated Version 2.3.47 WinDispatch.EXE, Winhost.EXE, and Host.INI are needed.

2. PC to MDT Cable (Null-Modem Cable):

3. Radio to MDT Cable:

4. ESP 520DX Programming:

• Program modes to match the REPEATER SYSTEM(S) which will be used or CHANNEL(S) for talkaround use if no repeater is being used. Refer to the ESP520DX programming manual for instructions on programming for DATA operation. MSK data type must be selected and PRIORITY #2 (data) LTR ID's must be identical on base and all mobiles in the data talk group.

5. SEA Repeater system Programming:

• Optional: Talkaround users may bypass this section.

  Program repeater(s) according to the programming manual with the correct Channel Number, Area Bit and Home Channel. Test the repeaters with a couple of mobiles in voice mode to insure system is functioning properly before using the DATA mode on the mobiles.

6. Mobile Station Configuration:

1. Select a 2 or 3 digit ID number to program the mobile data terminals. Refer to the DOCUMENT section of the KING CD for programming the MDT with the configuration program - EXC. NOTE: Use Base Station system configuration to make changes in the MDTs.
2. System Configuration:

7. Base Station Configuration:

1. The KING MDT ID # must be set at 2024 for base operation. Refer to the DOCUMENT section of the KING CD for programming the MDT with the configuration program - EXC.
2. System Configuration:

8. Minimum required Base Station Configuration Procedure:

1. Load the King Communications CD in the CD-ROM.
2. Select RUN program from Windows Taskbar. Select the CD ROM Drive and type: SETUP , then press return. NOTE: Setup is in the root directory of the KING CD.
3. Follow the instructions for a TYPICAL INSTALL.
4. After completing the installation, go to Windows Explorer and delete Windisp.EXE, Winhost.EXE, and Host.INI located in the directory of the installed King software. Default directory: KING.
5. Install Version #2.3.47 of the three files that were deleted above These files are available from KING COMMUNICATIONS.
6. Run Winhost.EXE

   NOTE: COM 2 is the default port to install the PC cable. If another port is used, the following changes will need to be made to PORT 2 of the Host.INI file:

   • PORT X ------------------ change to the COM port being used. X = (1-4)

     ADDRESS = COM X ---- change to the COM port being used. X = (1-4)

     IRQ = ? ---------------------- 3 or 4 depending on port used.

7. While Winhost is running, minimize the program and run Windisp.EXE.
8. With the opening main menu, select FILE, then select SETTINGS, and go to VEHICLES.
9. Add the vehicle ID # and Driver Name to match the programming of the mobile MDT. Save created data, exit and return to the MAIN MENU.
10. Select DISPATCH. Top selection under UNIT should have the ID(s) matching the mobile(s).
11. Program is now ready to send data.

APPENDIX A

King Mobile Data Terminal Configuration Setup

Using the EXC utility program that is included in the King CD installation, you will have the ability to make changes in specific parameters of the MDT operation. This program will be found under the King directory in your task manager. The changes performed below need to be made to both the base and the mobile MDT. The following setup must be connected in order to make changes:

1. Connect a power supply of 13.6VDC to the MDT using either method listed below.
   1. By using the cables specified in SECTION 3, you can connect an ESP520D to power and using the interface cable between the radio and the MDT to supply power.
   2. By using the female DB9 connector of the MDT (No radio is needed for this method.)

      The (+) lead going to PIN 5 and the (-) to PIN 1.

2. Connect the computer to the MDT* as shown in the Base Station Configuration (#7).

   * Make note of which serial port you are using as the EXC utility program will need to be launched using the correct port.

   With power applied to the MDT and computer's serial port attached, execute the EXC utility that corresponds to the the port you are using (COM 1 or 2). If the system is working correctly, it will respond with a red UNK. Press the "Enter" button on the keyboard several times. You should receive the same red UNK in response to each keyboard press of the "Enter" button. This indicates that communications between the MDT and the computer have been established. Type in the following commands listed below, pressing "Enter" after each line.

   NOTE: After each "ENTER", a yellow response should come back with the "A" after each command. This lets you know that the MDT acknowledged the change.

   • SQP + "ENTER"

     LKI 150 "ENTER"

     SRT 7 1000 0 0 0 0 "ENTER"

   The SQP command sets the squelch polarity. This must be set to (+) for correct operation with the ESP520D. If it is not, you will have a constant busy light on the MDT even when no RX signal is present.

   The LKI command sets the transmitter key-up time in 10ms increments. A value of 150 is recommended to allow adequate time for data to pass through a trunking system.

   The SRT command specifies the radio type and specific parameters for data transmission.

   Once these commands are entered and the correct acknowledgement has been received, the MDTs will be ready for installation.