HP 3326A Operating And Reference Manual page 21

Combined Operation
With COMBINED operation, the channel B output is diverted and summed with the chan-
nel A output (see Figure 1-7). COMBINED operation reduces the amplitude output limit
of each channel by 50% (6.02 dB) and sets the dc offset level to zero. DC offsets can
be entered if DC is selected as the function, however, when alternate functions (OFF,
sine wave, or square wave) are selected, the DC offset level is returned to zero. Note
that the peak-to-peak amplitude of the output signal is a function of the phase, frequency!
and amplitude of each channel. COMBINED operation is selectable only in the 2 CHAN-
NEL, 2 PHASE, and 2 TONE MODES. COMBINED operation is disabled for internal
modulation.
HP-IS Examples:
"CMBI
"
or
"CMB ON"
STEP 1
STEP
2
STEP 3
STEP 4