Tektronix 545A Instruction Manual page 105

TYPE 54-BA O CILLO COPE
+
SEE PARTS LIST FOR EARLIER
VALUES AND S/N CHANGES OF
PARTS MARRED WITH RED
TINT BLOCKS
WAVEFORMS VOLTAGE R
and
WERE OBTAINED WITH CONTROL ET A F
EXTERNAL TRIGGER IGNAL
FOR WAVEFORM .........................................
FOR VOLTAGE ..............................................
TRIGGERING LEVEL
FOR WAVEFORM .........................................
FOR UPPER VOLTAGE READING ............
FOR LOWER VOLTAGE READING .........
MPORTANT
see also note on this