Note: The product is shipped without the 18650 Battery.
Main hardware updates for the Mayhem Signature-Edition PortaPack H4M Pro：
The main change is the modification of the connector of the lithium battery, from the previous 104050 polymer lithium-ion battery (also known as soft pack lithium polymer battery) to 18650 cylindrical lithium battery.
With the help of the Mayhem team, the silkscreen of the product has been redesigned, and an anti-counterfeiting pattern has been added to the front PCB (we will record a video specifically to introduce to users how to distinguish the authenticity of the product). In addition, PortaPack H4M Pro has addedmore Mayhem firmware developer names to the back PCB.
Redesigned the position of the speaker and SD card slot.
Main hardware updates for the HackRF Pro：
Hardware Item
HackRF One
HackRF Pro
Main MCU
LPC4320
LPC4330
Logic Chip
CoolRunner-II CPLD
iCE40 UltraPlus FPGA
Flash Memory
8M-bit (W25Q80BV)
32M-bit (W25Q32)
RF Transceiver Chip
MAX2837 / MAX2839
MAX2831
ADC/DAC Chip
MAX5864
MAX5865
Working Frequency Range
1 MHz ~ 6 GHz
100 kHz ~ 6 GHz
Onboard Clock
No built-in TCXO
Built-in 25MHz 0.5ppm high-stability TCXO
USB Interface
Micro-B USB 2.0
USB-C USB 2.0
RF Shielding
Basic simple shielding
Reinforced internal RF shielding
Port Protection
Standard design
Enhanced antenna port surge protection
Firmware Expandability
Limited
Stronger expandability for custom firmware
Typical development work done by OpenSourceSDRLab to adapt the Mayhem firmware for HackRF Pro:
1. Optimized and repaired the transmitting functions of HackRF Pro and PortaPack H4M Pro, supporting stable transmission of POCSAG, APRS, ADS-B and other transmitting functions. The primary development work focused on refactoring clock configuration and FPGA register processing code for the Mayhem firmware stack.
2. Rectified the critical signal mode switching defect of HackRF Pro. Prior to the fix, when operating the device through PC client software, users were unable to switch between different transmission signal formats after sending the first type of signal, and had to perform hardware reset or USB reconnection manually. The submitted code eliminates this limitation and supports smooth switching of transmission signal types without physical reset.
3. Provided technical support to the Mayhem open-source community to fix the touchscreen unresponsive fault on PortaPack H4M Pro by adjusting pin multiplexing configuration.
4.Developed and integrated a new external clock detection mechanism to resolve the failure of TCXO clock oscillator identification on PortaPack H4M Pro.
