Odyssey TRX - is the result of lengthy research and numerous experiments and think I did a great device for radioamateurs. This is a fully finished project and ready for production. You can order It right now and get after a few months. Some radioamateurs already use this device right now and find that it works very well.
So, Odyssey TRX - what is this ? This is a fully digital Ham-Frequency short-wave and low-band SDR tranceiver. His transmitter has only 10 mW power output, so device can use as receiver and as Vector Network Analisator. For using with more power you need to use an external amplifier. I regard this as an advantage because the user don't have to overpay for functions that are not necessary. In the future, I'll present also an amplifier(15W), VHF transverter and autotuner ih the similar housing and the customer can choose a configuration that it requires. I call it "add block if you need" conception and device will fit this.
What inside ? Device uses modern high-quality components, is based on a 16 bit LTC2165 ADC and EP4CE22F17 Cyclone IV FPGA from Altera. Transmitter is using 14-bit DAC AD9144. Timing ensured by low-noise 122.880 MHz oscillator with phase-loop frequency stabilization.
Full understanding of the internal structure will give the block-scheme. Please note that device have the three options to connect to the PC: simple LAN, USB 3.0 via built-in converter and Wi-Fi+LAN via little router. All the options work identically and don't need specific firmware for the main part.
The main characteristics of the device shown in this table:
- board size is 123.5 x 75mm, appropriate for Hammond 1455J1201 housing.
- supply voltage: 7-15 V, reverse polarity and overvoltage protection.
- current consumption for 12 Volt power supply:
LAN & USB version, RX 250 mA, TX 340 mA
Wi-Fi version, RX 380 mA, TX 480 mA
- current consumption for USB bus power supply (5 volts):
USB version, RX 590 mA, TX 720 mA
- PC connections: LAN10/100, Wi-Fi or USB
- connectors for headphones, microphone, KEY/PTT: Mini Jack 3.5mm
- RF connectors: SMA-F
- connector for external devices control: DB9-F
- RX characteristics:
type of ADC: 16-bit LTC2165
sampling frequency: 122,880 MHz
two independed receivers:
receiving frequency range: 0.1-55 MHz
sensitivity, MDS (500): -127 dBm
blocking level: -8 dBm
Blocking Dynamic Range: 119dB
RM Dynamic Range (10 kHz): 114 dB
attenuator 0-30 dB
frequency stability using built-in reference generator: 5 ppm supported sampling rates: 48 — 960 kHz
wide band scope: 0 – 66 MHz
- TX characteristics:
frequency range: 1 — 55 MHz
output voltage on 50 ohms: 1 volt peak output power: 10 mW
linearity, IMD3: 60 – 65 dB
maximum width of the transmitted signal: 48 kHz
- Additional features:
input for high stability 10 MHz reference frequency
3.3 – 5.0 volts logic level 122.880 MHz stability frequency output
8 control 3.3 volts logic level lines for control of external devices :
4 lines for BPF/LPF, PreAMP control, Antenna switch control, Automatic Tuner control and PTT control
built-in sound codec for minimize delays,
headphones and microphone can be connected directly
automatic key processor with zero-delay self-monitoring,
both straight and Iambic modes are supported
VNA mode and frequency sweep measurement
complex impedance and SWR measurements are done with external RF bridge
What software is work ? It is SDR device and for working need some SDR program. Originally, device was supported nativelly in QUISK, QUISK VNA and Zeus Radio, but currently since firmware v1.3 was added OpenHpsdr protocol support and other programm became available. PowerSDR MRX, CuSDR, KissKonsole and much programm via ExtIO.dll for Hermes - HDSDR, SDR-Sharper, Studio1 and other.
Zeus-Radio and QUISK can to open two window for work with two receivers independly, PowerSDR MRX and CuSDR are used two receivers as provided by the program.
Source code. This project was based on the N2ADR TRX (James Ahlstrom) source code with extentions and can be downloaded freely from GitHab.
Risks and challenges
This project is finished and ready for production immediately. I have an experience of production in the past and have established contacts with the component suppliers and manufacturing firms.Learn about accountability on Kickstarter
- (37 days)