This is the same text as that engraved on the back of the UCR401 and UCR411a receivers.

FOR SPECTRUM ANALYZER
Press all 3 keys simultaneously to either enter or exit the spectrum analyzer. MENU key to stop, zoom or start scan. Zoom is indicated by < > icons. In zoom, since  most data is off the screen, the cursor is  centered and the data scrolls. Use the UP  and DOWN keys to scroll. To save cursor  frequency, press all three simultaneously  and then select "use new". To clear  spectrum, turn power OFF briefly.

FOR PILOT BYPASS
Step the menu key to the MAIN window.  Press the MENU and UP keys together for  b bypassed or p normal plot.

FOR THE 1 kHz TEST TONE
Step menu key to SETUP/EXIT window.  Step SEL UP key to SETUP/TONE  window. Press TONE (MENU) key. Press  TONE (UP) key. Step LVL (UP/DOWN)  keys to set tone level. Press MENU key to  stop and EXIT tone.

TO LOCK AND UNLOCK
Press and hold the MENU  key for 5 seconds.

TO RESET BATTERY TIMER
Press and hold MENU and DOWN key together  for one second.