STB100 Beacon Test Bench

Test all Cospas-Sarsat ELTs, EPIRBs, PLBs, and AIS Transceivers

WST STB100 AIS Testing


General Overview

The STB100 Beacon Test Bench is becoming known as The Standard in beacon testing equipment worldwide. No other test equipment provides this level of detailed, accurate, and reliable measurements for both Cospas-Sarsat approved emergency beacons and AIS Transceivers (new).

The STB100 Beacon Test Bench is the perfect tester for shore-based maintenance facilities, avionics test facilities, beacon manufacturers, beacon developers, and IMO radio surveyors.

STB100 Beacon Test Bench

The STB100 measures all 406 MHz, 121.5 MHz, and 243 MHz emergency beacons, including AIS EPIRBs (new), 406 MHz frequency stability, and AIS Transceivers (new).

The STB100 also has very accurate DC current and voltage measuring allowing for characterization of power supplied to a beacon, as well as measuring leakage current down to 200nA.

The user friendly STB100 software is included free with the purchase of your STB100 unit and can be downloaded directly from our website. Alternately, advanced users can use the optional API command set to customize their own User Interface.

Features Included
  • measures all 406, 121.5, 243, and AIS-EPIRB parameters
  • measures AIS Transceivers (Class A & B)
  • receives all Cospas-Sarsat frequency channels and decodes all protocols
  • measures and computes 406 MHz frequency stability
  • uses direct 50Ω RF input at full power – no attenuator needed
  • has optional Antenna input
  • monitors the DC supply to a beacon over a wide range: 1 to 30V, 5mA to 8A
  • measures Vin to Vout low dropout voltage of 50mV/A
  • measures beacon leakage current
  • has overload protection
  • has internal GPS engine for measuring delta distance
  • streams measurement data into delimited text files – for easy analysis
  • creates custom Beacon Test Report PDF
  • creates custom IMO Test Report PDF
  • connects up to two external temperature probes
  • customizable user interface with API command set
  • Cospas Sarsat Second Generation Beacon ready (coming soon)
Included with your Test Bench purchase
  • STB100 Beacon Test Bench
  • AC Power cord
  • USB to PC cable
  • Active GPS antenna
  • RF input antenna
  • Operator’s Manual
  • Certificate of Conformance
  • Certificate of Calibration
  • free software and firmware updates online
  • outstanding customer support
Software Revision 4.20 Notes – Dec 20, 2023:

· Test Report generator bug fix

· Minor bug fixes

Software Revision 4.10 Notes – Nov 10, 2023:

· Minor bug fixes

Software Revision 4.01 Notes – Apr 25, 2023:

· Second Generation Beacon measurement capability

· User comments field on Test Reports

· Improved RLS decode

· Improved Frequency Stability

· Minor bug fixes

Software Revision 3.30 Notes

· Improved Limit Tester functions

· 121/243 Training Frequency updates

Software Revision 3.21 Notes:

· 121.5 MHz antenna performance modifications

Software Revision 3.20 Notes:

· Improved IMO Auto Test

· Modulation Index measurement improvements

· Minor bug fixes

Software Revision 3.10 Notes:

· Added capability to test AIS Transceivers (Class A and Class B)

· Added capability to test AIS-EPIRBs

· Introduced the Oscillograph

· Added ELT (DT) Protocol decoding

· Added Protocol as a Limit Test parameter

· Added custom Test Report logo

· Added Get GPS location function

· Implemented Improvements to determining long vs short bursts

· Corrected upper/lower limits for Phase Symmetry in Limit Setup

· Added Custom filename numbering

· Implemented Minor bug fixes

Measurements Screenshots
Setup Screenshots
Limits Screenshots
IMO Test Screenshots
Individual Tests Screenshot
Customizable Test Report Screenshots
WST Cable-130-029
130-029 – Cable USB B Male to USB A Male – 6.5′

USB to PC Cable for the STB100 Beacon Test Bench.

WST Cable130-030
130-030 – Custom RF Cable TPS-m to BNC-m – 3′

RF Cable used to connect directly to a beacon with a TPS output port.  

WST Cable-130-031
130-031 – Custom RF Cable BNC-m to BNC-m – 3′

RF extension cable. 

WST Cable-130-032
130-032 – Custom RF Cable BNC-m to TNC-m – 3′

RF Cable used to connect directly to a beacon with a TNC output port.

WST Cable 130-033
130-033 – Custom Length RF Cable BNC-m to BNC-m

RF Extension Cable – Choose your desired cable length. WST provides Cable Loss input factors for any cable length.

WST Cable-130-035
130-035 – Pilot Plug to USB Cable – 3′

Pilot Plug to USB Cable for AIS Transceivers.

WST Cable-130-036
130-036 – Custom RF Cable BNC-m to SMA-m – 3′

RF Cable used to connect directly to a beacon or coax cable. 

WST Antenna-PN-420-101
420-101 – Receiver Antenna

Beacon Tester receiver antenna.

WST Antenna 100-GAA-SMA-M
100-GAA-SMA-M – Active GPS Antenna

Magnetic mount active GPS antenna.

WST Combiner 850-CMB102
850-CMB102 – 2-Channel Signal Combiner

121/406MHz signal combiner.

WST Combiner 850-CMB104
850-CMB104 – 4-Channel Signal Combiner

121/243/406/AIS signal combiner.

WST 850-BB100 – I/O Breakout Board
850-BB100 – I/O Breakout Board

USER I/O Breakout Board and Cable.

WST 850-PRB100 – Temperature Probes
850-PRB100 – Temperature Probes

RTD Stainless Steel temperature probe attachment.

WST 385-UHF-101 – UHF-m to BNC-f Adapter
385-UHF-101 – UHF-m to BNC-f Adapter

Adapter for directly connecting an AIS Transceiver via BNC to the STB100.

850-104 – STB100 Custom Waterproof Hard Case

Waterproof (IP67 rated), dustproof, and shockproof hard case with custom foam insert for safely transporting and storing your STB100 Beacon Test Bench and accessories.

My STB100 won’t receive either 406 MHz or 121.5 MHz.

Ensure that the proper Input mode is selected. If you are receiving a beacon self-test transmission through its antenna, then select Antenna. If you are connected directly to the beacon then select Direct Connection.

When I activate the beacon in self test mode, the measurements produce questionable results. Is there a problem with the beacon?

In order to meet all of the Cospas Sarsat requirements, a beacon is allowed a 15 minute warm-up period. When testing a beacon in self test, there is no warm-up period, hence some measurements may be somewhat skewed.
Also, in self-test, the 121.5 homing transmission may be different depending on the particular beacon. Some beacons transmit a short modulated signal, some beacons transmit a shorter unmodulated signal, and some beacons transmit no signal.

I am testing an ELT with separate 121.5 and 406 output connectors. What do I do to get the results printed on one Test Report?

The WST accessory 850-CMB102 is a low loss, 121.5/406 signal combiner. It can be used to combine the separate outputs from the ELT. Alternatively, you can complete the measurement in two steps: first, connect to the 121.5 transmitter, then start the test. Once the STB100 gives the indication that the 121.5 signal has been received, then switch the cable to the 406 transmitter without stopping the test. Once the 406 burst is received on the STB100, the measurement will be complete.

The beacon I want to measure has offset training frequencies on 121.5 and 243 MHz. How do I setup the Beacon Tester to receive these training frequencies?

Measuring Training Frequencies is easy. Go to the Setup > VHF Training Frequencies and select the training frequencies you are using.

ELT tester
AIS Testing BT200
AIS Testing BT200
AIS Testing BT200
AIS Testing BT200
AIS Testing BT200
WST Antenna 420-100
WST Antenna 100-GAA-SMA-M
WST Cable 130-029
WST Cable 130-002
WST BT200 screen
WST BT200 screen