Maritec AITS-R: Automatic Identification System, AIS, UAIS

Product Description

AITS-R (AIS Installation Test Set) is an operational test set operating on AIS1, AIS2 and DSC (channel 70), evaluating the operation of an AIS unit and AIS installation. The design references the relevant standards and recommendations, including IMO SN/Circ.227 and resolution MSC.74(69), annex 3. Both radiated and conducted tests can be performed.

AITS-R is a hand held portable instrument with an internal battery pack and charging circuit. It can also operate using an external 12VDC supply.

AITS-R is menu driven, using a 2 X 16 character LCD display and keypad. All menu driven test options are fully automated. Test results can be viewed on the LCD display and can be stored in the AITS-R’s non-volatile memory. The AITS-R can store two separate test sessions, which can be downloaded to a PC at a later stage using the AITS-R utility software. Customized test reports in HTML can be printed.

AITS-R does not use a GPS for synchronization. A proprietary TDMA slot-synchronizing algorithm is used which does not require a GPS 1 pps. It uses RATDMA for generating VDL and interrogation messages. A Pilot Plug evaluation function and NMEA/RS422 terminal display of external sensor inputs is provided.

Training is limited to the AITS-R simulator and user manual, which is provided with the AITS-R. The AITS-R is field programmable and firmware upgradeable.

Features:

Fully portable with internal battery pack (rechargeable)
LCD display and keypad, menu driven command set
In-line forward power and return loss measurement within a 26.6’ millisecond transmission period
Termaline RF power meter (1 – 12.5W)
In-line or antenna RF interrogation of AIS equipment under test using keypad, including DSC
In-line or antenna RF decoding and display of AIS received packets, including DSC
NMEA/RS422 terminal display of external sensor inputs
Pilot Plug evaluation function (NMEA/RS422)
Selectable non-volatile memory retains test session for processing
Download test results to PC and print customized reports in HTML format
Internal battery and charging circuit or external 12VDC operation
AITS-R/ADS software utility, operational & technical manual and simulator provided
Cables and antenna included - charging supply (battery eliminator) is not included

Technical Information

Electrical:

Power supply: internal batteries, 6V 700mAh rechargeable

Charging supply: external 12 VDC nominal

Power consumption: <0.6W nominal

Connectors:

Multifunction: 9 pin D socket

Power: DC socket

Conducted: VHF antenna: TNC

Radiated: VHF antenna: BNC

Physical:

Dimensions: 209(L),101(W),41(H) (mm - including connectors, excluding antenna and cables)

Weight: 700g (including internal battery)

Temperature:

Operating: +15°C - +35°C

I/O Interface:

Presentation: RS232 - 38400 bits/sec

Pilot Port: RS422 -38400 bits/sec

NMEA terminal: RS422 - 4800-38400 bits/sec

Messages:

AIS VDL messages:

Encode/decode: 1,2,3,4,5,9,11,18,19,21,24

Interrogation (encode): 3,4,5,9,11,18,19,21,24

DSC (encode/decode): Test signal 1 (IEC61933-2)

I/O Interface:

NMEA: Output: VDM & VDO

NMEA: Terminal Input (displays first 32 characters)

Transmission schedule:

AIS: RATDMA, user initiated

DSC: test signal 1, user initiated

Design reference standards & recommendations:

ITU.R M.1371-1 IEC61993-2 IEC62287-1 IEC61162-1/2 EN50081-1 EN50082-1

EN55022 EN61000-4-2 EN61000-4-3

IEC62320-1 IEC62320-2 IMO SN/Circ.227

MSC.1/Circ.1252 MSC.74(69), annex 3

ignal Generator:

Output Power 2mW (+1,–0.5 mW)

AIS frequency 161.975,162.025 MHz

AIS dual channel operation (AIS1&2)

AIS modulation FM-GMSK

AIS data rate 9600 bits/sec

DSC frequency 156.525 MHz

DSC modulation FSK (V23)

DSC data rate 1200 bits/sec

AIS & DSC channel spacing 25 kHz

Receivers (2 x AIS, 1 x DSC)

AIS frequency 161.975, 162.025 MHz

AIS dual channel operation (AIS1&2)

AIS data rate 9600 bits/sec

AIS sensitivity (ANT BNC) -47 dBm

DSC data rate 1200 bits/sec

DSC frequency 156.525 MHz

DSC sensitivity (ANT BNC) -37 dBm

AIS & DSC channel spacing 25 kHz

________________________________________________________________________________________________________________________