Programmable Modulation Waveform Generator
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 Certificates Page 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. 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.   Minimum Keyboard And Display  (Extended using AIS Developer Studio Interface)
Menu A Items
ITEM	Selection	Function
ITEM 1	Multiple DSC	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 Msg 8 TDMA	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
Generator A Specification
GMSK	BT selectable 0.5,0.4,0.3	Front Panel 50 Ohm BNC Socket
DSC	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
PTT	BNC Socket Output
Female RS232 socket	external GPS/ 1PPS/SYNC
Female RS232 socket	Presentation Port and Proprietary

Certificates

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Design Reference Documentation

Specifications subject to change without prior notice.

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