Here is a consolidated version of the Hidden Feature List for the Tecsun PL-880.
Thanks to Thomas over at The SWLing Post for publishing all of the hacks in one list.
|What to do
|Hold button in until change occurs. One push to change back.
|Muting Threshold for AM/SSB, also sets FM Threshold on some versions
|Select mode to adjust first (AM, SSB, FM). Press and hold, then adjust with either tuning knob. Press 9 again when done to save.
|DNR (Automatic adjustment of bandwidth, etc?)
|Press and hold till display says 'ON' and again for 'OFF'.
|Display Firmware Version, and date
|With radio OFF: press and hold until display turns on. Then press and hold again to get firmware. Press one more time for date
|Press and hold to toggle between 75 (USA) and 50 (Europe)
|Line-Out Level (only works on FM?)
|Press and hold till current level begins flashing. Adjust with either tuning knob. Press again to save
|Adjusting Seconds on Clock
|With radio off, press and hold, and then adjust seconds
|Calibrating on AM (MW)
|Tune a strong MW station. Turn on SSB mode (USB/LSB). Move fine tuning till zero-beated and pitch matches non-SSB. Press and hold the snooze button till correction value appears in display, then press snooze again to save.
|PRESS and HOLD the 0 button. Look at the UPPER RIGHT corner of the display. A 2-digits number is BLINKING as well as the Hz digits of the tuned frequency. RELEASE the 0 button, and adjust the FINE TUNING. Tune, de-tune and re-tune before calibration is perfect. Play a bit with it to understand how it works. Change is effective AFTER you press 0 again. Do for both USB and LSB modes. Check the tone when tuned to xxx.95 USB and xxx.05 LSB. They should sound exactly the same.
|Forcing External Antenna on MW/LW
|Visit http://goo.gl/AXSgMI for instructions and video