Walkie Talkie Module VHF 134-174Mhz 5Km (SA828) [S203]


* Specs

SA828 is an all-in-one professional walkie-talkie module in small size. It is very easy to use with powerful function. This module has full function of a professional walkie-talkie and can talk with any analog walkie-talkie in the market. With the small size, it can be easily embedded into instrument, portable and handheld device. SA828 works well in the hot/cold environment with the KDS 1PPM TCXO. The features of excellent antenna match network, good RF amplifier, high RF sensitivity allow its communication easily to achieve over 3Km in open area.


Rotary switch for channel selection, EEPROM, Audio Amplifier, RF Amplifier, PTT key, Antenna socket are all included in such a small size module. Besides, all parameters (CTCSS, CDCSS, SQ, Predefined channels etc) can be easily modified either by PC software or command using UART interface. With the embedded audio volume turning circuit, user can only solder a variable resistor on Pin16, Pin17 to adjust the volume steplessly.



1ppm TCXO

Embedded EEPROM, data saved even power off 

High / low output power selection (500mW-1W)

8 SQ* 166 CDCSS, 38 CTCSS

High Integrated with ultra small size

High Sensitivity: -124dBm  

3~5Km distance in open aera

1W Output Power* 12.5/25KHz bandwidth selection

Solely TX and RX frequency

Frequency range: 134 -- 174MHz



Audio tracking and control system 

Outdoor sport product


Security system

Pocket / handheld device

Small size walkie-talkie

'2) Sensor > WalkieTalkie' 카테고리의 다른 글

Walkie Talkie Module VHF 134-174Mhz 5Km (SA828) [S203]  (0) 2016.09.17
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YARD Stick One Sub-1 GHz [B082]


* GitHubhttps://github.com/rdiot/rdiot-b082.git

* Specs

YARD Stick One is a sub-1 GHz wireless transceiver IC on a USB dongle. Based on the Texas Instruments CC1111, it features:

half-duplex transmit and receive

official operating frequencies: 300-348 MHz, 391-464 MHz, and 782-928 MHz

unofficial operating frequencies: 281-361 MHz, 378-481 MHz, and 749-962 MHz

modulations: ASK, OOK, GFSK, 2-FSK, 4-FSK, MSK

data rates up to 500 kbps

Full-Speed USB 2.0

SMA female antenna connector (50 ohms)

software-controlled antenna port power (max 50 mA at 3.3 V)

low pass filter for elimination of harmonics when operating in the 800 and 900 MHz bands

GoodFET-compatible expansion and programming header

GIMME-compatible programming test points

open source

* Contents

1. Install in Linux

# wget https://bitbucket.org/atlas0fd00m/rfcat/downloads/rfcat_150225.tgz

# tar zxvf rfcat_150225.tgz

# cd rfcat_150225

# sudo apt-get install python-usb

# sudo python setup.py install

# sudo rfcat -r

2. Running RfCat

root@host:/dev_store/rfcat_150225# sudo rfcat -r

RfCat, the greatest thing since Frequency Hopping!'

Research Mode: enjoy the raw power of rflib

currently your environment has an object called "d" for dongle.  this is how 

you interact with the rfcat dongle:

    >>> d.ping()

    >>> d.setFreq(433000000)

    >>> d.setMdmModulation(MOD_ASK_OOK)

    >>> d.makePktFLEN(250)

    >>> d.RFxmit("HALLO")

    >>> d.RFrecv()

    >>> print d.reprRadioConfig()

>>> print d.reprRadioConfig()

== Hardware ==

Dongle:              YARDSTICKONE

Firmware rev:        0348

Bootloader:          CC-Bootloader

== Software ==

rflib rev:           323

== Frequency Configuration ==

Frequency:           901999877.929688 hz (0x259555L)

Channel:             0

Intermediate freq:   281250 hz

Frequency Offset:    0 +/-

Est. Freq Offset:    18

== Modem Configuration ==

Modulation:          2FSK

DRate:               38360.595703 hz

ChanBW:              93750.000000 hz

DEVIATION:           20507.812500 hz

Sync Mode:           15 of 16 bits must match

Min TX Preamble:     4 bytes

Chan Spacing:        199951.171875 hz

BSLimit:             No data rate offset compensation performed

DC Filter:           enabled

Manchester Encoding: disabled

Fwd Err Correct:     disabled

== Packet Configuration ==

Sync Word:           0x0C4E

Packet Length:       255

Length Config:       Fixed Packet Mode

Configured Address:  0x0

Preamble Quality Threshold: 4 * 2

Append Status:       No

Rcvd Packet Check:   No address check

Data Whitening:      off

Packet Format:       Normal mode

CRC:                 disabled

== AES Crypto Configuration ==

AES Mode:            CBC - Cipher Block Chaining

Crypt RF Input:      off

Crypt RF Output:     off

== Radio Test Signal Configuration ==

TEST2:               0x88

TEST1:               0x31

TEST0:               0x9

VCO_SEL_CAL_EN:      0x0

== Radio State ==


     DONGLE RESPONDING:  mode :d, last error# 1

== Client State ==


     client thread cycles:      336/13

     client errored cycles:     0

     recv_queue:                (0 bytes) ''

     trash:                     (3 blobs) "[128, 142, (1461761463.730662, '')]"

     recv_mbox                  (2 keys)  "['0x42', '0xff']"

       app 0x42 (2 records)

             [0x1]    (3 frames)  "[('B\x01\xff\x00#\xe2_O4\xfd\xc4[\xad\x7f\xd6\x01}[\xb5_\xbc*66r:+\x83$\xe7\xb2\xfe\"

             [0x7]    (0 frames)  "[]"

       app 0xff (4 records)

             [0x88]    (0 frames)  "[]"

             [0x80]    (0 frames)  "[]"

             [0x82]    (0 frames)  "[]"

             [0x86]    (0 frames)  "[]"



>>> d.setFreq(315060000)

>>> d.setMdmModulation(MOD_ASK_OOK)

>>> d.setMdmDRate(int(1.0/0.000550))

>>> d.RFxmit("\x8E\xE8\xE8\x88\x88\xE8\x88\x88\x00\x00\x00" * 40) 

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DVB-T + DAB + FM RTL2832U + R820T2 (R820T2,RTL2832U) [B081]


* Specs

R820T2+RTL2832U chip

Support SDR

Support DAB;

Support FM;

Support DVB-T;

Watch and record digital terrestrial TV on PC or Laptop;

Full DVB-T bandwidth reception (6/7/8 MHz)

Digital TV recording and playback as DVD quality;

Remote control;

Support Windows 2000/XP/Vista/WIN7;

Support both MPEG-2, MPEG-4(H.264) encoding; 


Package Included:

1x DVB-T

1x Antenna

1x Remote Control

* Contents

FM RTL2832U RTL2832U Basic Test FM Radio

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100Khz-1.7GHz RTL SDR + Upconverter (2832U,R820T) [B079]


* Specs

1. Can be used to test signals receiving from VHF/UHF band

2. The receiving signal strength which received from VHF/UHF is not the best. It can be used to receive the nearby signals (eg. FM broadcasting radio or other Hand-held radios). To achieve the best effect, you need to connect associated antennas Cannot be used to receive HF signal band

3. To achieve the best effect, you need to connect associated HF antennas such as Long Wire , Random Wire, Dipole etc.


Fully assembled and ready to use

Uses RTL2832U+R820T chip set

100KHz to 1766MHz, operating frequency

Covers all HF amateur bands

Covers VHF & UHF bands from 24-1766MHz

Up to 3.2 M Sample rate. (~2.8 MHz stable)

Receiver modes AM, NFM, FM, DSB, USB, LSB and CW

Note: depends upon the SDR software used with the receiver

8-bit ADC giving ~50 dB dynamic range

50 Ohm input impedance

Double SMA golden antenna connectors

Diode protection on RF input

Aluminum panels

LED power and band indication

40MHz local oscillator for HF conversion

DBM balance ring mixer

Small size board

Free software

Independent antenna inputs for Shortwave and VHF

USB computer connection ( mini usb) Powered by common USB

Very High dynamic range receiver

SPDT High Power UltraCMOS RF Switch

Accurate and efficient band filters

Very clean audio reception

All specifications subject to change without notice

* Contents

RTL SDR + Upconverter Basic Test FM Radio

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RF Upconverter For SDR [B069]


* Specs


Female SMA for both input and output for a wide array of connectivity options

In-line SMA connectors.  Much easier to connect and manipulate than side-by-side SMA connectors

Antenna protection on RF input; in-circuit in both enable and passthrough mode

Solely high-quality components used in the RF signal path

Powered by common USB-B USB for a multitude of power options

RF-suitable power supply regulation (TPS79333)

PTC fuse on USB power input to protect your upconverter from short circuits

Upconverter enable/passthrough toggle switch--less fiddling with small, delicate cables and connectors

Socketed oscillator for a simple upgrade path

Stable 25ppm oscillator included

LO disabled in passthrough mode

High-quality 2-layer PCB with ENIG finish

Fully assembled and ready to use

Designed to fit standard off-the-shelf Hammond enclosures

2 mounting holes for standard PC screws

Designed and manufacturered in conjunction with Opendous Inc., an excellent open-hardware design company

Full project documentation--schematics, PCB design files, assembly information--is freely available (see link above).  DIY'ers rejoice!  We will have a limited number of bare PCBs available for those who want to 'roll their own'

A portion of the proceeds from your purchase will be used to support this and other open-hardware, open-source initiatives



Before operating your unit for the first time, and every time you run with a new SDR, we recommend running the tuning procedure located here.  It is not a mandatory procedure but may help fine-tune your, erm. tuning.  Pop the included oscillator into its socket and you are ready to go!

Operating the unit is very simple:

Connect your antenna to the RF input

Connect your SDR to the IF output

Ensure your toggle switch is in the enable position

Plug your USB power source into the USB-B USB jack

Fire up your favorite SDR software.  Tune to 125MHz (+/- the tuning offset from the tuning procedure) + your desired frequency and enjoy!

* Contents

RF Upconverter Test with HackRF One

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HackRF One (HackRF-ONE,ANT500) [B028]


* Specs

10 MHz to 6 GHz operating frequency 

Half-duplex transceiver

Up to 20 million samples per second

8-bit quadrature samples (8-bit I and 8-bit Q)

Compatible with GNU Radio, SDR#, and more

Software-configurable RX and TX gain and baseband filter

Software-controlled antenna port power (50 mA at 3.3 V)

SMA female antenna connector

SMA female clock input and output for synchronization

Convenient buttons for programming

Internal pin headers for expansion

Hi-Speed USB 2.0


Open source hardware

* Contents

Hack RF Basic Test

- Airspy Lib : https://github.com/airspy/host/

- SDR Sharp Download : http://airspy.com/download/

- Source Code : https://sourceforge.net/projects/hackrf/files/

- Git Source : https://github.com/mossmann/hackrf

- Great Scott Gadgets : http://greatscottgadgets.com/hackrf/

Posted by RDIoT

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