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11

Technical Specifications 

 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

 

Regulatory Information 

 
FCC Identifier KNY21161341911919 
DOC Identifier 2329 102 336A 
 

 
FCC Notification 
 

This device complies with part 15 of the FCC rules.  Operation is subject to the following two conditions: 1) This device 
may not cause harmful interference and 2) this device must accept any interference received, including interference that 
may cause undesired operation. 
 
This device must be operated as supplied by The Oceanscience Group. Any changes or modifications made to the device 
without the express written approval of The Oceanscience Group may void the user's authority to operate the device. 
 
CAUTION: The transceiver has a maximum transmitted output power of 955mW. It is recommended that the transmit 
antenna be kept at least 23 cm away from nearby persons to satisfy FCC RF exposure requirements.   
 
Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 
of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential 
installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in 
accordance with the instructions, may cause harmful interference to radio communications. However, there is no 
guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to 
radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try 
to correct the interference by one or more of the following measures: 

 

Reorient or relocate the receiving antenna. 

 

Increase the separation between the equipment and receiver. 

 

Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 

 

Consult the dealer or an experienced radio/TV technician for help. 

 
This product is licensed by The United States. Diversion contrary to U.S. law is prohibited.  Shipment or re-export of this 
product outside of The United States may require authorization by the U.S. Bureau of Export Administration. Please 
contact The Oceanscience Group for additional information or assistance. 

Frequency 

902 to 928 MHz 

Transmitter Output Power 

1mW to 1W (+30 dDm) 

Range *10miles 
Modulation 

Spread Spectrum GFSK, 120 kBs – 170 kBs 

Spreading method 

Frequency hopping 

Occupied Bandwidth  

230 kHz 

System gain 

140 dB 

Error Detection 

32 Bit CRC, resend on error 

Forward error correction  

Golay, retransmit on uncorrectable error 

Data Encryption 

Substitution, dynamic key 

Max Link Throughput 

115 Kbaud standard speed 

Data Interface 

RS-232/RS485 

Operating Modes 

Point-to-Point, Point-to-Multipoint, Repeater 

* Line of sight distance with unity gain antenna 

** Throughput measured assuming 75% frequency availability 

Summary of Contents for HydroLink ML4 Series

Page 1: ...1 HydroLink ML4 Series Wireless Data Transceivers Quick Start Guide and User s Manual 110 Copperwood Way Suite E Oceanside CA 92054 760 754 2400...

Page 2: ...transceiver setup 5 Section 4 Base transceiver setup and system power up 6 Section 5 WinRiver setup 6 Section 6 Connections and wiring 7 Section 7 Power requirements 7 Section 8 Antennae requirement 8...

Page 3: ...e of channel 1 of your HydroLink ML4 See section 1 Configuring the ADCP for details on how to do this The next step is to install the ADCP GPS or depth sounder on the Riverboat see Riverboat Assembly...

Page 4: ...19 200 Kbps The following procedure explains how to set the baud rate and save it in the ADCP This procedure assumes that you will be using the program BBTalk supplied by RD Instruments Begin by confi...

Page 5: ...anscience supplied instrument the baud rate has been pre set to the correct rate When instrument set up is complete install both instruments on the Riverboat see the Riverboat Assembly Instructions Re...

Page 6: ...e Base Transceiver Setup and System Power up Setup for your base system is done using the cables supplied Figure 11 shows the equipment needed for your base system HydroLink ML4 Base unit Figure 11 Ma...

Page 7: ...he heading communications Click add then Broad Band ADCP then Next You will be asked on which port is it attached Port identification may be different for each laptop so make sure the correct port is...

Page 8: ...erly aligned the backshell of the connector should be screwed to finger tightness This connector is IP68 rated when properly connected The antenna connector is type TNC and care should be given so as...

Page 9: ...re to match the transceiver the PC and instrument should be connected directly If using a GPS provided by Oceanscience there is no need to change the baud rate as they are configured at the factory Do...

Page 10: ...ot configured to use the same serial settings e g baud rate as your HydroLink ML4 Your transceivers are too far away from each other Move them closer or raise the base antenna Check all cabling connec...

Page 11: ...is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the...

Page 12: ...12 Hydrolink ML4 Pin Assignment...

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