HPE 606A Operating And Servicing Manual page 11

OPERATING CONTROLS
Set
Frequency <<]
MODULATION AMPLITUDE.
MODULATION SELECTOR
r, 7 INT.
Adjust
eet Output
eae
SIGNAL GENERATOR MODULATION CRYSTAL CALIBRATOR RF OUT
INPUT-OUTPUT PHONES. OFF son wer, dB vad tts b e
es ® note ( o @ =< @—+—+}— Connect
RF Output
Select Type Plug In Switch for
of Here for Calibrator
Modulation External Operation
Modulation
Adjust Plug Head-
Internal Phones In
Modulation Here