Geoelectron TRM501 Wireless Data Transceiver Module User Manual

: June 6, 2024
: Geoelectron

Table of Contents

File information：
Technical specifications
Definition of interface connector pin
Transceiver command instructions
Installation of radio
Main Power Supply
Warning
Photo
UHF Antenna specification
Documents / Resources
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)

TRM501 Wireless Data Transceiver Module
User Manual
（Version：V1.0）

File information：

File type| UHF|
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Model| TRM501
Product code|
Product name| Wireless Data Transceiver Module
Author：| Fighting Han| Date：| 20210908
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reviewer：| | Date：|
signer：| | Date：|
approved：| | Date：|

Technical specifications

Technical specifications

Transmitter specification

Receiver specification

Specification name| specification requirements
Sensitivity| Better than -118dBm@BER 10-5，9600bps
Co-channel inhibition| >-12dB
Block| >70dB
Adjacent channel selectivity| >52dB@25KHz
perturbation resistance stray| >55dB
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Modulator

Specification name| Specification requirements
Air rate| 9600bps,19200 bps
Modulation method| GMSK

Definition of interface connector pin

Pin No.	Input/output	definition
1	Input	VCC
2	Input	VCC
3	Input/output	GND
4	Input/output	GND
5	NC	No use
6	Input	Enable(ENABLE UHF radio module, active at a high level)
7	Output	TXD(UHF data output)
8	NC	No use
9	Input	RDX(UHF data input)
10	NC	No use
11	NC	No use
12	NC	No use
13	NC	No use
14	NC	No use
15	NC	No use
16	NC	No use
17	Input	Config(default is high station data mode, need to configure low to

enter command mode)
18| NC| No use
19| NC| No use
20| NC| No use

Transceiver command instructions

3.1 Serial port configuration in the factory state.

serial port baud rate setting	38400
Data bits	8
Stop bit	1
Check bit	none

3.2Basic command
3.3.1 TX 【parameter】
Function： set the transmission frequency（MHz）
Parameter choice：410.000 – 470.000
Example： TX 466.125 shows: “PROGRAMMED OK”
3.3.2 TX
Function： Check the transmission frequency
Example： TX show: “TX 466.12500 MHz”
3.3.3 RX 【parameter】
Function： set receive frequency（MHz）
Parameter choice：410.000 – 470.000
Example： RX 466.125 shows: “PROGRAMMED OK”
3.3.4 RX
Function: Check the receive frequency
Example： RX show: “RX 466.12500 MHz”
3.3.5 BAUD 【parameter】
Function： set air baud rate（bps）
Parameter choice：9600、19200
Example： BAUD 9600 show: “PROGRAMMED OK”
3.3.6 BAUD
Function： check the air baud rate（bps）
Example： BAUD show: “BAUD 9600”
3.3.7 PWR 【parameter】
Function: set the transmission power
Parameter choice： H、L
Example： PWR L show “PROGRAMMED OK”
3.3.8 PWR
Function: check the transmission power
Example： PWR shows “PWR L”
3.3.9 CHANNEL 【parameter】
Function： Set the current channel
Parameter choice：0、1、2、3、4、5、6、7
Example： CHANNEL 0 shows “PROGRAMMED OK”
3.3.10 CHANNEL
Function： Check the current channel
Example： CHANNEL show “CHANNEL 0”
3.3.11 PRT 【parameter】
Function： Set current protocol type
Parameter choice： TRIMTALK、TRIMMK3、SOUTH
Example： PRT TRIMTALK show“PROGRAMMED OK”
3.3.12 PRINT
Function： Check current protocol type
Example： PRT show“PRT TRIMTALK”
3.3.13 PREV
Function： Check current software version
Example： SREV show“GA0B11O12D15.09.12”
3.3.14 SER 【parameter】
Function： Set the serial number
Parameter choice： Less than 16 numbers ASCII
Example： SER TRU201-006 shows “PROGRAMMED OK”
note： Serial number is the only remark for the UHF, so it’s forbidden to change the serial number by software.
3.3.15 SER
Function： Check the serial number
Example： SER shows “SN: TRU201-006”
note： If UHF has never set the SN with no.14 command, so only show the “SN:”
3.3.16 FLOW
Function： Check the lower limit of UHF frequency.
Example： FLOW show“FLOW 410”
3.3.17 FUPP
Function： Check the upper limit of UHF frequency.
Example： FUPP shows “FUPP 470”
3.3.18 SBAUD 【parameter】
Function： Set baud rate of Communication interface.
Parameter choice：9600、19200、38400、57600、115200
Example： SBAUD 38400 shows “PROGRAMMED OK”
3.3.19 SBAUD
Function： Check the baud rate of the Communication interface.
Example： SBAUD shows “SBAUD 38400”

3.4 Special commands
3.4.1 CCA 【parameter】
Function： Check the received signal strength value (dBm) of the specified channel (MHz).
Parameter choice：410.000 – 470.000
Example： CCA 466.125 show：
1） CCA 【parameter 1】：【parameter 2】， Example “CCA 466.125:-106.125”， indicate the received signal strength value is 466.125MHz in the current channel.
2） “CCA 466.125:ERROR”， indicates the test is failed. But it is not indicated that all the channels to be tested are applicable, but it is only the failure for the test operation without connecting the antenna, or too close to the emission source, etc. that may lead to the test failure.
3.4.2 RSSI
Function： Check the received signal strength value.
Example： RSSI
show：
1） RSSI indicates it doesn’t receive any data in the protocol, so it can’t show the received signal strength value.
2） RSSI -52.478 -48.063，-52.478（dBm）

Installation of radio

Figure 1 shows the installation dimension of the data transceiver module PCB, which firmly fitted the radio modem onto the mounting surface of the user system。

Main Power Supply

TRM501 can operate with any 7.5V power supply, which comes from data interface connector with good filtered.
The power must supply 2A current at least and featured with current-limiting, even if you make a radio modem operating on low power mode (2W).

Warning

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.

Photo

UHF Antenna specification

T e c h n i c a l parameters|
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Frequency range (MHz)| 410～470
Bandwidth (MHz)| 20
Polarization mode| Vertical
Gain (dBi)| 4
Input impedance (Ω)| 50
Voltage standing wave ratio| ≤2.0
Maximum power (W)| 20
Joint type| TNC
Antenna length (mm)| 293
Antenna weight (g)| 50
Extreme wind speed (km/h)| 90
Remark: Antenna structure for an elastic whip, and resistance to bending.

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.
Caution: Any changes or modifications to this device not explicitly approved by the manufacturer could void your authority to operate this equipment.
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 equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.
This equipment should be installed and operated with a minimum distance of 200cm between the radiator & your body.

2.2 List of applicable FCC rules
This module meets the requirements of FCC CFR Title 47 Part 90, FCC CFR Title 47 Part 2.
2.4 Limited module procedures
This module is an approval module.
2.6 RF exposure considerations
Integration is strictly limited to fixed categorized end-products where a separation distance of at least 200 cm between the radiating part and any human body can be assured during normal operating conditions.
2.7 Antennas
This module only allows connection antennas in the instruction manual. If other antennas are used, re-evaluation is required.
2.9 Information on test modes and additional testing requirements5
This module is tested stand-alone, if more other modules work together with this module, please evaluation of the multiple RF exposure.
2.10 Additional testing, Part 15 Subpart B disclaimer
The final end product must be labeled in a visible area with the following Contains TX FCC ID:
2ABNA-TRM501.If the size of the end product is smaller than 8x10cm, then an additional FCC part 15.19 statement is required to be available in the user’s manual: 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.

IMPORTANT NOTE:
Integration is strictly limited to mobile/fixed categorized end-products where a separation distance of at least 200 cm between the radiating part and any human body can be assured during normal operating conditions.
IMPORTANT NOTE:
In the event that these conditions can not be met (for example certain laptop configurations or co-location with another transmitter).then the FCC authorization is no longer considered valid and the FCC ID can not be used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate FCC authorization.
IMPORTANT NOTE:
This module is intended for OEM integrators only and the OEM integrators are instructed to ensure that the end-user has no manual instructions to remove or install the device. The OEM integrator is still responsible for the FCC compliance requirement of the end product, which integrates this module.
LABEL OF THE END PRODUCT:
The final end product must be labeled in a visible area with the following Contains TX FCC ID:
2ABNA-TRM501.If the size of the end product is smaller than 8x10cm, then an additional FCC part 15.19 statement is required to be available in the user’s manual: 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.
IMPORTANT NOTE:
Integration is strictly limited to mobile/fixed categorized end-products where a separation distance of at least 200 cm between the radiating part and any human body can be assured during normal operating conditions.
IMPORTANT NOTE:
In the event that these conditions can not be met (for example certain laptop configurations or co-location with another transmitter).then the IC authorization is no longer considered valid and the IC ID can not be used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate IC authorization.
IMPORTANT NOTE:
This module is intended for OEM integrators only and the OEM integrators are instructed to ensure that the end-user has no manual instructions to remove or install the device. The OEM integrator is still responsible for the IC compliance requirement of the end product, which integrates this module.
LABEL OF THE END PRODUCT:
The final end product must be labeled in a visible area with the following Contains TX IC:
11648A-TRM501.If the size of the end product is smaller than 8x10cm, then an additional IC statement is required to be available in the users manual:

Guangzhou Geoelectron Science & Technology Company Limited
All rights reserved shall not be reproduced

Documents / Resources

| Geoelectron TRM501 Wireless Data Transceiver Module [pdf] User Manual
TRM501, 2ABNA-TRM501, 2ABNATRM501, TRM501 Wireless Data Transceiver Module, Wireless Data Transceiver Module
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