 AIS Tester is a test device operating on AIS1 (ch87B),
AIS2(ch88B) and DSC(ch70) frequencies. The tester is designed under
corresponding standards and recommendations as a tool of operation and
installation tests of AIS unit (Automatic Identification System). The
tests’ volume comply with “Guidelines on annual testing of the AIS unit
MSC.1/Circ.1252”.Tester 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.
The input signal displaying on LCD from external sensors through the RS-422 port provides the control of “Pilot plug”.Tester’s features:
AIS Test: - Poll, receive and check data from AIS ransponders.
- Simulate AIS data transmissions, such as ship’s name, position, length, course, speed,
power and beam.
- Simulate AIS data transmissions, such as ship’s name, position, length, course, speed,
power and beam.
- Poll information on chnnel 70
- Simulate NMEA data transmissions.
Frequency measurements:
- Channel AIS 1 (161.975 MHz)
- Channel AIS 2 (162.025 MHz)
- Channel DSC (156.525 MHz)
Signal power measurement:
- Channel AIS 1 (161.975 MHz)
- Channel AIS 2 (162.025 MHz)
- Channel DSC (156.525 MHz)
Tehcnical Specification: Signal 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
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) I/O Interface:
Presentation: RS232 - 38400 bits/sec
Pilot Port: RS422 -38400 bits/sec
NMEA terminal: RS422 - 4800-38400 bits/sec
Design reference standards:
ITU.R M.1371 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.74(69), annex 3 Tester
makes all measurements as testers of other manufacturer's such as
AITS-R, Maritec, RSA and Futronic GMDSS/AIS Test Box, Futronic I/S,
Denmark. |
