Topcon America 080511 User Manual

RH-1 USERS MANUAL

Please read these Terms and Conditions carefully.

This product is designed to be used by a professional. The user should have a good knowledge

of the safe of the product and implement the types of safety procedures recommended by the

local government protection agency for both private use and commercial job sites.

Any changes or modifications to the equipment not expressly approved by the

party responsible for compliance could void your authority to operate such

equipment.

Turn off the power supply near a highly accurate electronic equipment.

RH-1

・Outline of product

RH-1 is GPS receiver in GRS-1 to measure the GPS data in real time.

RH-1 supplies the electric power to GRS-1 by two battery and outside AC power, and

enables the operation of GRS-1 of long time.

・Surveying to use the wireless modem

This method of GPS survey allows the operator to reduce the point occupation time, thus permitting

field crews to survey many more points compared to the other methods available.

Real Time Kinematic Surveying

In RTK surveying, one receiver serves as the reference station. The receiver conducts observations

with its antenna affixed to a stationary tripod or another device. The second receiver functions as a

rover, and conducts observations (using an antenna) affixed to a mobile pole and moved to

observation points.

Unlike post-processed kinematic surveys, RTK surveys uses a communications link between the

Base and Rover. Using a radio modem link, the Base receiver transmits its measurement and location

data to the Rover receiver. The Rover, based on the transmitted data and its own observation data,

immediately conducts a baseline analysis and outputs the results.

The GPS receiver receives the correction data that RH-1 received through the connection by

Bluetooth.The GPS receiver uses GRS-1 usually.

General Specification

Table A-1 Physical Specification
Table A-2 lists the Bluetooth wireless technology module’s general
Table A-3 lists the internal Digital UHF Modem’s General Specifications For RH-1/U
Table A-4 lists the internal Spread Spectrum Modem’s General Specifications For RH-1 /FH

(1/10)

Physical Specifications

Table A-1 Physical Specification

Dimensions 8.50” x 5.83” x 6.71” ( 216 x 148 x 170.5 mm ) ※no Antenna

15.47” x 5.83” x 6.71” ( 393 x 148 x 170.5 mm ) ※with Antenna

Weight 1.4Kg
Input / output Bluetooth,Serial, Power, Antenna,Communication pins(for GRS-1)
Battery Type Li-ion battery, Rechargeable / Replaceable
Input voltage 12V

Operating temperature -20 C° to +50 C°
Strage temperatuere -30 C° to +60 C°

Waterproof IPX4

Wireless specifications

Table A-2 Bluetooth Module Specifications

Range up to 10 m (indoor)
Type Class 2
Supported profiles SPP

Digital UHF Modem General Specifications(For RH-1 /U)

Table A-3 lists the internal Digital UHF Modem’s General Specifications

Parameter Specification
Operating frequency range

country/region/purpose dependent
Modulation techniques GMSK,
Channel spacing 12.5 kHz/25 kHz
Transmission rates at 25 kHz spacing • GMSK– 9600 bps

Transmission rates at 12.5 kHz spacing • GMSK– 4800 bps

Data speed of serial interface Max 115200 bps
Forward Error Correction Available
Scrambling Available
Communication mode Half-Duplex

Output power 0.01 W (+10dBm), 0.02 W (+13 dBm),

Nominal output impedance 50 Ohms 2.0:1 VSWR
Output power control accuracy + 1dB (at normal test condition)

Adjacent channel selectivity

Nominal output impedance 50 Ohms 2.0:1 VSWR
Output power control accuracy

410-470 MHz

0.05 W (+17 dBm), 0.1 W (+20 dBm),

0.25W (+24 dBm), 0.5 W (+27 dBm),
1W (+30 dBm)

+2.0 dB and -3.0 dB (under extreme test condition)

-70 dB for 25 kHz Channel Spacing

-60 dB for 12.5 kHz Channel Spacing

+ 1dB (at normal test condition)
+2.0 dB and -3.0 dB (under extreme test condition)

(2/10)

Spread Spectrum Modem’s General Specifications (For RH-1 /FH)

Table A-4 Internal Spread Spectrum Modem’s General Specifications

General
Frequency Range

country/region/
purpose dependent

Signal structuring Frequency-hopping spread spectrum

Hopping pattern 5 per band, user-selectable

Hopping channels 128

Occupied bandwidth 100 KHz
Frequency modulation

technique
System gain 135 dB

Network topology Point-to-point, Point-to-multipoint
Operation mode Transmitter, Receiver, Repeater

902 to 928 MHz, United States
915 to 925 MHz, Australia

FSK, 64 Kbps

Protocol FH915, FH915+
Transmitter (TX)

Carrier power 250 mW (24 dBm)/1 W (30 dBm), user selectable
Receiver (RX)

Sensitivity -105 dBm at 10-4 BER
Dynamic range 105 dBm

Data communications
Serial interface RS232
Serial data rate 9600, 19200, 38400, 57600 bps, user selectable
Effective radio link rate 9600, 10200, 17000, 51000 bps

User selectable for FH915; automatic selection for FH915+

Error correction FEC (15.7), majority decoding
Antenna Type
Type 1/2 wave articulating whip

Connector Reverse TNC polarity
GAIN 2.4dBi

(3/10)