1. A serial to LEMO cable (p/n 4538). 2. A usb-to-serial adaptor with drivers installed. 3. The serial port must be assigned within the range COM1 to COM4 if using a PC. 4. PC users must install full upgrade CD, if it's the first time Preston upgrade software is being installed. 5. Press Reset during power up to start MDR2 into upgrade mode. 6. Press Iris Set during power up to start HU3 into upgrade mode. 7. Clear previous settings. HU3 - power on holding Iris Reset. MDR2 - While powered, hold reset for 10 seconds. Recommended Adapters
1. A serial to LEMO cable (p/n 4538). 2. A usb-to-serial adaptor with drivers installed. 3. Press Reset during power up to start MDR2 into upgrade mode. 4. Press Iris Set during power up to start HU3 into upgrade mode. 5. Clear previous settings. HU3 - power on holding Iris Reset. MDR2 - While powered, hold reset for 10 seconds. Recommended Adapters