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Version 2.1 Last Revised January 19, 2011 All contents in this manual are copyrighted by JAVAD GNSS. All rights reserved.The information contained herein may not be used, accessed, copied, stored, displayed, sold, modified, published, or distributed, or otherwise reproduced without express written...
Thank you for purchasing this product. The materials available in this Manual (the “Manual”) have been prepared by JAVAD GNSS for owners of JAVAD GNSS products. It is designed to assist owners with the use of the FH915 and its use is subject to these terms and conditions (the “Terms and Conditions”). Note: Please read these Terms and Conditions carefully.
Conditions. The user is granteJAVAD GNSSd a personal, non-exclusive, non-transferable license to use such Software under the terms stated herein and in any case only with a single FH915 or single computer. You may not assign or transfer the Software or this license without the express written consent of JAVAD GNSS.
For more detailed information about the take-back and recycling of this product, please contact your supplier where you purchased the product or consult. www.javad.com...
Canadian Emissions Labeling Requirements Technical Assistance If you have a problem and cannot find the information you need in the product documentation, contact your local dealer. Alternatively, request technical support using the JAVAD GNSS World Wide Web site at: www.javad.com. www.javad.com...
Sleep Mode 300 mW 500 W Standby Mode, ordered by SLEEP input pin 1. The supply voltage (pins 15 and 16 in user interface connector,) must be 3.6 to 4.2VDC to provide RF output power >500mW (licensed operation mode). www.javad.com...
Antenna type depends on the site requirements, and may be directional or omni-directional. Note that to support 8 miles distance range between Base station and FH915 unit, an antenna mast should elevate the base antenna a minimum of 20 feet above the average level of the terrain.
The firmware of the FH915 radio transceiver resides in a flash memory. The updating of the radio transceiver programs is entirely software-based. The flash memory is re-programmable through an UART interface or over the air.
2.3. Modulation Technique FH915 radio transceiver uses two bands: 902-928 MHz ISM license free USA band and European CEPT license free 868-870 MHz band. In 902-928 MHz band FH915 radio uses frequency hopping transmission techniques.
(CMOS/TTL compatible input lines). 2.3.2. Operating Modes The operating modes for FH915 can be set through the CLI, and/or through AWLaunch. The following operating modes are available for FH915: 1. The sleep mode has automatic transmitter activation by an internal real-time clock, or by an external controller through the data interface control lines (RTS and DTR), or by the triggering of the external Sense Inputs.
(including Frame’s CRC). This provides the wireless media access protection. 2. User selectable Frequency Hopping Pattern provides another level of the wireless media access protection. At the same time it allows operators to increase the number of links deployed in the same location. www.javad.com...
6-20 V DC, 1A Figure 3-1. FH915 connected to Evaluation Kit 3.2. Antenna connection The FH915 may be connected to external antenna using TNC to MMCX RA Antenna cable (included in the Kit). 3.3. Power connection The FH915 powered through Evaluation Kit and Power Cable (included in Kit). The Banana plugs of power cable may be connected to any available laboratory power supply, battery or other power source with power parameters, suitable for particular FH915 power specifications.
Serial RS-232 connection : Evaluation Kit provides reverse polarity protection only in voltages range, specified for particular AUTION FH915. 3.4. Serial RS-232 connection A standard Null-Modem cable (included in Kit) with DB-9 Female connectors on both ends may be used to connect PC COM_X port with Serial port on adapter.
- Unit’s Configuration files - Software Images • Uploading Unit’s Configuration files • Saving into the configuration files the configuration parameters modified through the CLI. 4.1. Command Line Interface Convention The following convention is implemented in FH915 Command Line Interface (CLI): www.javad.com...
• Escape-Sequence: “+++” with 20 ms guard time before and after the command characters • Escape-Acknowledge: “@00<CR><LF>” 20 ms toggling on CTS control line needed to acknowledge switching from Data to Maintenance mode and vice versa. In Maintenance mode, the unit’s serial port must keep CTS line always active. www.javad.com...
The powered up radio modem by default goes to Data Mode regardless of DTR control line polarity. 4.1.3. Switching to Data Mode • DTE sends the CLI command “DATAMODE<CR>” or „DATAMODE<LF>” to the unit. Note: Command “DATAMODE<CR><LF>“will be accepted as command “DATAMODE<CR>” and Data Byte=0x0A. www.javad.com...
ALARM Note: JAVAD GNSS radio modem’s does not support data flow and parity on the maintenance serial port. MPORT operates using 8 bits in one byte fixed (not configurable). The radio modem with none-dedicated maintenance serial port must keep CTS line always active in MPORT mode (DP/MP is low).
4.4.5. SLEEP The SLEEP command determines the sleep mode parameters. The sleeping FH915 can be activated by real-time CLK, DTR/RTS lines, and command received through TTL inputs. The user can select one, two, or all three conditions.
(range from 01 to 99) for engineering releases and alphabetic format (A to Z) for manufacturing releases BootLoader Version The INFO command without Parameter Name indicates all values: FH915 Spread Spectrum Radio Modem. Product ID =41 S/N = 11327 Hardware =2.0 Firmware =2.1.9...
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TTL_IN2 = 1 RSSI = -110 dBm BER = < 2.3E-5 FREQ = 910.000000 MHz CHAN = 10 TEMP = 70C Note: The indicated receive signal strength (RSSI) is equal to -147 dBm if there is no signal received from transmitter. www.javad.com...
Appendix A ECHNICAL PECIFICATIONS FH915 DSP based integrated Spread Spectrum Modem is the single board OEM wireless transceiver intended for SCADA, outdoor telemetry applications and transmission /receiving of differential corrections and additional information by terrestrial radio channels between two GNSS receivers.
• Embedded Firmware Compensation for Operation at Extremely Low and High Temperatures • Compact Design A.1.7. Mechanical Properties For End-product Dimensions for PCB Mounted Enclosure: 80 mm x W: 46.5 mm x H: 7.6/9.5 mm (3.15" x 1.83" x 0.3") www.javad.com...
The user ports connector is used to provide connection with an external DTE or with the PC running AWLaunch management software applications. Note: The RS232-to-TTL adapter must be used to provide physical level compatibility between COM port of PC running AWLaunch and FH915 user interface port. www.javad.com...
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As an option could be used as TTL Input Line 1. DPORT3 MDM_GRN Data Carrier Used by remotes to indicate that the remote Detect Output has successfully acquired the signal from base station: (0V) 1 – Carrier detected (synchronized) (3.3V) 0 – No carrier detected (not synchronized) www.javad.com...
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Signal and Chassis Ground TTLI2 TTLIN TTL Input line TTL Input An internal 100K pull-up resistor is applied. VCC36 Power Supply External Regulated positive 4.0V DC from ext. Power Supply. VCC36 Power Supply External Regulated positive 4.0V DC from ext. Power Supply. www.javad.com...
The quality and strength of the Spread Spectrum signals translates into range for Spread Spectrum communications. The system’s range will greatly depend on the local conditions. Topography, local communications and even meteorological conditions play a major role in the possible range of communications. www.javad.com...
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Spread Spectrum Radio Usage www.javad.com...
This product should never be used: • Without the user thoroughly understanding operator’s manual. • After disabling safety systems or altering the product. • With unauthorized accessories. • Contrary to applicable laws, rules, and regulations. FH915 ANGER SHOULD NEVER BE USED IN DANGEROUS ENVIRONMENTS www.javad.com...
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Safety Warnings General Warnings www.javad.com...
JAVAD GNSS’ Authorized Dealers During the warranty period, JAVAD GNSS will, at its option, repair or replace this product at no additional charge. Repair parts and replacement products will be furnished on an exchange basis and will be either reconditioned or new.