PMG1 - Programmable Modulation Waveform Generator

General Description

 

The Programmable Modulation Waveform Generator Model PMG1 creates the required modulation waveforms as set out in IEC61993-2 paragraph 10.4 and IEC 62287 paragraph 10.4. It can perform the encoder requirement as set out in IEC61993-2 10.6.

 

The PMG1 is a conveniently sized add on for any good quality signal generator.  All menu entries are displayed on a 2 X 16 character LCD screen for easy visibility. Toggle switches have been limited to the power switch to prevent factory damage. Utilization of positive action high quality push switches is included in the design.

 

The PMG1 is field programmable and upgradeable.

 

Operation

 

The operation is simplified to multiple choices. An AIS and  DSC profile are uploaded to the PMG1 with transponder data to allow VDL simulation.

 

Automated PC API Operation.

Automated control is now standard using the RS232 presentation port on the PMG1. A simple string library is all that is required to control all facets of the PMG1. View the operational and technical manual for further information.

 

 

Features

 

  • Encoder Function as stated in IEC61993-2 paragraph 10.6 “Encoder for receiver measurements”.
  • Standard DSC test signal as defined in 10.4.1
  • Standard TDMA test signal as defined in 10.4.2
  • Standard TDMA test signal as defined in 10.4.3
  • Standard TDMA test signal as defined in 10.4.4 (Class B draft IEC 62287)
  • Own user profile
  • VDL Packet creation for message types 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,18,19,20,21,22,23,24 (extended using AIS Developer Studio interface )
  • Includes CCITT 511 bit pseudo-random test pattern.
  • Non-volatile memory retains programming on power down.
  • Manual Menu driven command set.
  • Automated control via simple string API.
  • External DC operation.
  • Automatic Synchronization scheme.
  • LCD display with backlight.
  • Push button selection of menu and variables.
  • VDO String generation
  • See Download Page

 

 

 

   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Minimum Keyboard And Display  (Extended using AIS Developer Studio Interface)

 

Menu A Items: 

 

ITEM 1

SETTING 

SET GMSK BT 0.5

SET GMSK BT 0.4 

SET GMSK BT 0.3 

SET DSC PRE-EMPHASIS

SET DSC NO PRE-EMPHASIS 

ITEM 2

Multiple DSC

Test Signal Number 1

ITEM 3

Multiple Msg 8 TDMA

Test Signal Number 2

ITEM 4

Multiple Msg 8 TDMA

Test Signal Number 3

ITEM 5

Multiple Msg 8 TDMA

Test Signal Number 4

ITEM 6

Multiple Msg 8 TDMA

Test Signal Number 5

ITEM 7

Manual Single Entry

MANUAL VDL MSG TYPE 1      +VDO

MANUAL VDL MSG TYPE 2      +VDO

MANUAL VDL MSG TYPE 3      +VDO

MANUAL VDL MSG TYPE 4      +VDO

MANUAL VDL MSG TYPE 5      +VDO

MANUAL VDL MSG TYPE 9     +VDO

MANUAL VDL MSG TYPE 11    +VDO

MANUAL VDL MSG TYPE 18A  +VDO

MANUAL VDL MSG TYPE 18B  +VDO

MANUAL VDL MSG TYPE 19    +VDO

MANUAL VDL MSG TYPE 21    +VDO

MANUAL VDL MSG TYPE 24A  +VDO

MANUAL VDL MSG TYPE 24B  +VDO

MANUAL DSC Position & Name

ITEM 8

System

DISPLAY GPS   GPGGA STRING

ITEM 9

System

SERIAL NUMBER 010101-xxxx

SW Version

 

Menu B Items:

 

ITEM 1

Stream

Infinite stream 10101010

ITEM 2

Stream

Infinite stream 00110011

BT of 0.5,0.4,0.3 selectable for each menu item – NO NRZI encoding is performed on this stream

 

Synchronization in order of priority:

 

Internal Slot Map synchronized with

External GPS GGA

External GPS 1PPS

Internal Slot Map synchronized with

Profile GPS

External EUT 1PPS

Internal Slot Map synchronized with

Profile GPS

Internal slot map

 

Synchronization in order of priority:

 

Internal Slot Map synchronized with

External GPS GGA

External GPS 1PPS

Internal Slot Map synchronized with

Profile GPS

External EUT 1PPS

Internal Slot Map synchronized with

Profile GPS

Internal slot map

 

Generator A Specification:

 

GMSK

DSC

BT selectable 0.5,0.4,0.3

V23

Front Panel 50 Ohm BNC Socket

PTT

Internal PTT O/P

Rear Panel 50 Ohm BNC Socket

 

Generator B Specification:

 

GMSK

BT selectable 0.5,0.4,0.3

 Front Panel 50 Ohm BNC Socket

 

Dimensions:

 

283mm Wide

135mm Deep

60mm High

 

Connectors:

 

DC power source.

Nominal 12VDC @ 500mA

Fuse Socket

500 mA Continental

Signal Generator A

BNC Socket Output

Signal Generator B

BNC Socket Output

Internal Bit Clock

BNC Socket Output

Female RS232 socket

external GPS/ 1PPS/SYNC

Female RS232 socket

Presentation Port and Proprietary

 

Design Reference Documents

 

Document Number

Title

IEC 61993-2

Universal Ship borne Automatic Identification System (AIS).

ITU-R M.1371-1

Technical characteristics for a universal ship-borne automatic identification system using time division multiple access in the maritime mobile band.

ITU-R M.493

Digital Selective Calling (DSC) system for use in the Maritime Mobile Service.

ITU-R M.825-3

Characteristics of a Transponder system using DSC techniques for use with vessel traffic services and ship-to-ship identification.

IEC 62287-1

AIS Class B/CS (CSTDMA)

IEC 62320-1

AIS Base Station

IEC 62320-2

AIS Aids To Navigation Station (AtoN)
EN50081-1 EMC
EN50082-1 EMC
EN55022 class B – Radiated interference field strength
EN61000-4-2 Electrostatic discharge
EN61000-4-3 Radiated frequency electromagnetic field 80Mhz to 1000Mhz

 

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September 8, 2010