This document describes version 1.2.15 of the firmware for the thinkRF D4000 downconverter/tuner.

It is distributed as a single binary file, thinkRF_D4000_firmware_v1.2.15.img.

This version of the D4000 firmware is compatible with all thinkRF D4000 products.

Fixed Defects

1. Fixed an issue where the external LEDs did not update properly.

2. Modified boot procedure so external reference LED correctly reflects the reference source

selected during boot.

New Features


Known Issues and Limitations

1. The unit will sometimes boot to a fault state. In this case, the status LED will blink red and

the unit should be rebooted.

2. At specific points within the operating band, the device is slower to tune. See Support Articles

 for details.