RFDSP board dev. done 2018.01.04
[ High speed RF-DSP board ]
122 MSPS AD & DA,
Altera Cyclone IV FPGA,
STM32 ARM,
TI Audio CODEC,
5'' TFT
FW: I/Q based demodulation, signal processing in freq. domain.
H7R HF SSB radio DSP board 1v0
2018.04.dd
2018.05.dd
Spread spectrum DCDC 12V IN, 3V3 5V 48V OUT
VHDL CIC [ DEC by 10 ] simulation
Spread Spectrum DCDC power source
2019.06.19
Első tesztek / First tests ~ 14.2 MHz.SSB / USB
2019.07.15
2019.09.30
2020-2021. ------------------------------------------------------------------------------------------------------------
H7R HF SSB radio 1v1 DSP board assembly in progress
New / modified DCDC PWR supply
H7R HF SSB radio 1v1 DSP board & the new power supply assembled, FW modified
RF router,
RX/TX preamps, HP and RX/TX NYQ filters, A/D & D/A direct connect - work in progress
TX / RF spectrum measurements
TX DAC is working
MIC input / PTT input RF blocking & ESD protection
- i2c controlled audio compressor and RF blocking - PCB design done
PA driver & HF PA100 W
- 100W PA in progress
100W HF PA & PA driver test
The PA input power is aprox. 0.7W, the output power is 100..120W. Tested from 3.5 MHz to 30 MHz.
The PA output Power will be aprox. 160..180W with 1,4..1,5 W input Power (modified PA driver development in progress).
New PA driver and improved IMD
PA100W driver with RD15HVF. BIAS current thermal stability. BIAS On / Off on PTT. The output power is 26 dBm (the sum of spectrum power measured with dual tone), That's enough to drive the PA100W. The IMD performance is 60 dBc IM3.
100W PA with 2x MRF101 DMOS. Improved IMD performance, 30 dBc IM3, the IM5 and others are below. The output power is 100..130 W PEP with SSB. Improved BIAS current thermal stability.
- 3.65 MHz - 90W PEP @ 30 dBc IM3
- 7.15 MHz - 90W PEP @ 30 dBc IM3
- 14.2 MHz - 130W PEP @ 30 dBc IM3
- 21.2 MHz - 110W PEP @ 30 dBc IM3
- 24.9 MHz - 90W PEP @ 30 dBc IM3
- 29.9 MHz - 80W PEP @ 30 dBc IM3
H7R transceiver pictures
H7R 1v1 video - 2023
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