e-survey TRU35 User manual

TRU35 User Manual
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TRU35 Wireless Data Transceiver
User Manual_V1.2

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Contents
1. Introduction ..................................................................................................................................................3
2. Key features ..................................................................................................................................................4
3. Technical Specifications ................................................................................................................................5
4. Product Interface ..........................................................................................................................................6
4.1 LED Display...........................................................................................................................................6
4.2 Buttons.................................................................................................................................................7
4.3 Channel Display....................................................................................................................................7
5. Connection Port............................................................................................................................................8
5.1 Definition of 5-Pin ................................................................................................................................8
6. Configuration ................................................................................................................................................9
6.1 Connect TRU35.....................................................................................................................................9
6.2 Parameter Setting...............................................................................................................................10
6.3 Channel Detect...................................................................................................................................10
6.4 Equipment Information......................................................................................................................11
6.5 Temperature Control..........................................................................................................................11
6.6 Radio Control......................................................................................................................................12
6.7 Firmware Update................................................................................................................................12
7. Working Mode ............................................................................................................................................12
7.1 Serial Mode........................................................................................................................................12
7.2 Bluetooth Mode.................................................................................................................................12

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1. Introduction
TRU35 is a high-power, small-size, half-duplex digital radio model which is designed using
advanced 32-bit cortex M4 microcontroller technology, wireless transceiver RF technology, and
digital communication technology. It uses high-quality RF components, excellent EMC and EMI
processing. The utility model has the advantages：
⚫High transmission power
⚫Long transmission distance
⚫Integrated transmission and reception
⚫Convenient installation
⚫Easy to use
⚫Stable and reliable
Figure 1.1

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2. Key features
⚫All in one
Integrated with transmitting and receiving functions.
⚫Radio Relay
Increase the transmitting distance by receiving data and transmitting out using different
frequency.
⚫Power Protection
Two-stage surge protection is used to protect the radio from damage when the input voltage
or current exceeds the normal range or positive and negative stages are reversed.
⚫Standing Wave Detection Protection
Prevent damage caused by long-time open circuit or short circuit.
⚫Good Heat Dissipation
One-piece molded case makes it easy to perform good heat dissipation.
⚫Thermal Protection
TRU35 can adjust the transmit power adaptively, automatically reduce the power when
temperature is too high, and increase the power when temperature decreases. Ensure radio
equipment is always in a stable power range and will not be damaged by overheating.
⚫IP67 Protection
⚫Bluetooth Function
Bluetooth can be used to configurate operating mode, protocol, frequency, power level as
well as receiving data and transmitting out using radio.
⚫16 Channels
User can switch frequency quickly with 16 radio channels.
⚫Long Transmission Distance
Transmission distance can reach 14Km with high power level (Optimal conditions)

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3. Technical Specifications
General Specifications
Frequency Range
410~470MHz
Operating Mode
Half-duplex
Channel Spacing
12.5KHz/ 25KHz
Channels
16
Modulation
GMSK/ 4FSK
Operating Voltage
Nominal voltage 12.5V (10.8~15V)
Power Consumption
(Typical)
Transmit (High Power)
91W
Receive
6.5W
RF Power Stability
≤±1.0ppm
Dimension
165×125×81mm
Weight
1680g
Operating Temperature
-40~+85℃
Storage Temperature
-45~+90℃
IP Rate
IP67
Antenna Interface
TNC, female
Antenna Interface Impedance
50ohm
Data Interface
LEMO 5pin
Transmitter Specifications
RF Output Power
10W/ 30W (12.5V Input)
RF Power Stability
±1.5dB
Adjacent Channel Inhibition
>50dB
Receiver Specifications
Sensitivity
Better than -116dBm@BER 10-5, 9600bps
Co-channel Inhibition
>-12dB
Block
>70dB
Adjacent Channel Selectivity
>52dB@25KHz
Perturbation Resistance Stray
>55dB
Modulator
Air Rate
9600bps, 19200bps
Modulation
GMSK/ 4FSK

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4. Product Interface
4.1 LED Display
There are 5 LED indicators showing current working status.
Indicator
Color
Description
Voltage
Green
Solid green
Power on
Flash 1Hz
Low voltage (flash when lower than 11.3V, stop
transmitting when lower than 10.5V)
Flash
Stop working when temperature is higher than 90℃
High Power
Green
On
Transmitting with high power (30w)
Off
Transmitting with low power (5W)
Transmitting
Green
Off
Default
Flash
With transmitting data frequency
Figure 4.1

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4.2 Buttons
User can switch power, channel number and power on/off device with buttons.
Buttons
Function
Switch low/high power
Switch transmitting power to low/high level
Power on/off
Power on/off
Switch channel
Switch channel
(Can only switch TX channel. Need to use software to switch RX
channel)
4.3 Channel Display
The panel show current transmitting channel.
Display
Function
Show current channel number:
1~9~0: Channel 1~10
a~f: Channel 11~16
Receiving
Green
Off
Default
Flash
With receiving data frequency
Bluetooth
Blue
Solid blue
With connection
Flash
Transmitting data
Off
No connection

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5. Connection Port
There are two ports on TRU35 for external antenna and power/serial.
Port
Function
Radio antenna
TNC, connect to external radio antenna
Power/Serial
Provide power and connect to 5pin/DB9 serial port
5.1 Definition of 5-Pin
5-pin Definition
Pin No.
Definition
1
VCC, 5.5-16V
2
GND
3
RXD
4
GND
5
TXD
Serial port baud rate setting
9600~25600
Data bits
8
Stop bit
1
Check bit
None
Figure 5.1 Radio Antenna Port
Figure 5.2 Power/Serial Port
Figure 5.3

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6. Configuration
The configuration software has been integrated into SurPad4.0 data collection software.
6.1 Connect TRU35
➢Start SurPad4.0 software, then find Tools -> External Radio Configuration
➢“Radio type” choose “Geoelectron”, “Connection mode” choose “Bluetooth”
➢Then click “Search” to search device. You will see radio serial number in the list
➢Select the device and click [Connect], the Bluetooth indicator will turn blue
➢Click “Settings” to show setting page
Note:
1. Disconnect GPS receiver before you connect external radio
2. The first time to connect, it will ask to input pair code: 1234

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6.2 Parameter Setting
In this page, you can set channels frequency, radio protocol, baud rate, relay function and alert
for low power level/high temperature.
Note:
1. The frequency must be supported by external radio antenna.
2. When relay function is enabled, receiving channel should be same with Base, transmitting
channel should be same with Rover.
3. When relay function is enabled, the radio protocol should be the same.
4. When relay function is enabled, receiving and transmitting frequency can’t be the same.
5. Low pressure alert is set to 10.5v by default. When lower than 11.3v, the power indicator
will flash but still can transmit data. When lower than 10.5v, the power indicator keep
flash and stop transmitting data.
6. High temperature warning is set to 90℃ by default. The power indicator will flash and
stop transmitting data when higher than 90℃.
6.3 Channel Detect
In this page, you can detect the strength of predefined/customized frequency.
Note:
1. The external radio antenna is required for this function.
2. If the detected frequency strength is strong, that means some other people may be
using this frequency.

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6.4 Equipment Information
In this page, you can view device information like current temperature and power level.
6.5 Temperature Control
In this page, you can set temperature threshold and power gain. For example, in below picture
the first level threshold is set to 60℃, second level threshold is set to 85℃. When the temperature
achieves the threshold, it will reduce the transmitting power automatically. The level to reduce
power is depending on the gain value. The absolute value of gain is higher, the more power level
will be reduced.
Note:
1. Temperature range: -100~1000℃
2. Gain range: -60~60℃

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3. The first level temperature must be lower than second level.
6.6 Radio Control
In this page, you can set radio baud rate, restart or power off device and restore factory setting.
6.7 Firmware Update
In this page, you can update radio firmware. In the process of updating, the power indicator will
flash with 5Hz frequency. After finished, device will restart automatically.
7. Working Mode
TRU35 have two kinds of working mode: Working with base station and been used as external
radio to transmit correction data; or used as relayed radio to receive correction data, then
transmit the data with another frequency.
7.1 Serial Mode
To connect GPS receiver with serial cable, then set receiver as external radio mode. After finished,
The TX indicator will flash.
Note:
1. The baud rate should be same with TRU35 when configurate GPS receiver
2. The default baud rate is 38400
7.2 Bluetooth Mode
TRU35 support to transmit data without serial cable. Firstly, log into GPS receiver WebUI. Then
set working mode as Bluetooth, search the radio serial number and save the setting.
After finished, the Bluetooth indicator and TX indicator will flash which means the radio is
receiving data through Bluetooth and transmit out with radio frequency.