CES Wireless to SEA ESP520DX Interfacing

APPLICATION NOTE #9

INTERFACING
CES WIRELESS
TRK-240-A001 MOBILE DATA TERMINAL
MDC-210-A001 Base Modem
MDC-150-A001 Base Modem
TO
SEA MODEL ESP520DX DATA RADIO

This application note provides the basic cable wiring information for connecting a SEA ESP520DX data radio to either the CES Wireless Model MDC-210 A001 or the CES Model MDC-150 A001 base modem controller or the CES Wireless TRK-240-A001 Mobile Message Display Terminal (MDT). This note provides the necessary wiring and setup information for a basic data system. The information in this application note is believed to be correct at the time of issuance but is provided strictly as a courtesy to SEA customers without warranty.

A UNIT OF DATAMARINE INTERNATIONAL INC.
7030 220th St. S.W.
Mountlake Terrace, WA 98043
(425) 771-2182, FAX: (425) 771-2650

AN-9
06/12/00

1. Minimum system requirements:

1	-	CES TRK-240 A001 Message Display Terminal configured for use on an SEA Data Radio.
1	-	CES MDC-210 A001 or MDC-150 A001 Base controller with related application software.
2	-	SEA ESP520DX Data Radios programmed for Data Operation. Refer to Section 3.
2	-	Radio to TRK-240 A001 interface cables (supplied by CES part number TRK-240/01). Refer to section 2 for details.
1	-	PC to MDC-210 A001 or MDC-150 A001 interface cable (not supplied). Use standard RS-232 DB-9 (female) to DB-25 (male) interface cable.

2. Radio to MDT cable:

ESP520DX DB-25 Male			CES TRK-240 A001 MDT DB-25 Male

PIN #		Description		PIN #	Description

1 & 11	---	GND	---	2	---	Ground (BLK)
5	---	PTT	---	11	---	Press to Talk (L. BRN)
6	---	CTS	---	13	---	Busy/Trunk (GRY)
10	---	RD	---	3	---	Receive Audio (YEL)
12	---	TD	---	4	---	Transmit Audio (ORG)
13	---	+13VSW	---	1	---	Power Input (RED)
Warning: Be sure to mark each end of the cable as both ends are the same.

3. ESP520DX Programming:

Program the desired modes in the ESP520DX to match the REPEATER SYSTEM(S) which will be used or CHANNEL(S) for talk-around use if no repeater is being used. Refer to the ESP520DX programming manual for instructions on programming the radio for DATA operation.

Jumper JU105 on the ESP520DX computer PCB-0505-02 board must NOT be installed for 1200 bps (Bell 202 or MSK) data operation when trunking data transmission is also desired. A regular mode (not available on test modes) is programmed for 1200 bps data operation as follows:

Required Configuration Programming:
Data Option Type:	MSK
Required Mode Programming:
Type:	Trunked or Conventional
Area:	Site Area bit
Data Enable:	Voice & Data or Data Only
Home:	Desired home channel of site
Busy Channel Lockout:	Y
Repeater Channel:	Channel number in Home position
Priority #2 ID:	Data DTL ID

When the radio is on a mode programmed for Voice & Data, the Local Mic may key for voice operation and the MDT may key for data operation. When the radio is on a mode programmed for Data Only, only the MDT may key it. Please note if selecting Voice & Data operation, a TX and an RX ID (that do not match the Data ID) are also required for the mode programming.

4. SEA Repeater system programming:

Optional: Talk-around users may bypass this section.
Program repeater(s) according to the ESP1000/ESP1100 Instruction 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.

5. Base Station Configuration:

6. Mobile Station Configuration:

7. CES Set-Up Parameters for Conventional Data Operation:

TX Level = 1Vp-p (Adjust R15 on Modem board while monitoring level with an oscilloscope on pin 3 of DB-9 connector into radio.)
RX Level = 800mVp-p (Adjust R10 on Modem board while monitoring level with an oscilloscope on TP1 on same board.)

Baud rate = 1200 Radio Type = BUSY
- Lead In Delay = 10 (100mS) default
  Busy/Request Check = 50 (500mS)
  Request Window = 200 (2000mS)
  Grant Check = 20 (200mS)
  Grant Window = 200 (2000mS)
  Ack Response Time = 25 (250mS)
  Ack Wait Time = 500 (5000mS)
  Retry Window = 500 (5000mS)

8. CES Set-Up Parameters for Trunked Data Operation:

TX Level = 1Vp-p (Adjust R15 on Modem board while monitoring level with an oscilloscope on pin 3 of DB-9 connector into radio.)
RX Level = 800mVp-p (Adjust R10 on Modem board while monitoring level with an oscilloscope on TP1 on same board.)

Baud rate = 1200 Radio Type = LTR
- Lead In Delay = 10 (100mS) default
  Busy/Request Check = 50 (500mS)
  Request Window = 200 (2000mS)
  Grant Check = 20 (200mS)
  Grant Window = 200 (2000mS)
  Ack Response Time = 25 (250mS)
  Ack Wait Time = 500 (5000mS)
  Retry Window = 500 (5000mS)