HP 3326A Operating And Reference Manual page 37

The Entry Keys
2 Tone Mode
Changing phase in the 2 TONE mode changes the phase of a channel with respect to
the initial waveform. The phase of channel A and B are independent.
Pulse Mode
A change in the phase of channel A is made with respect to the initial channel A wave-
form. The channel B output is the complement of the channel A output. An attempt
to display the channel B phase results in the display of the "Error 47 INTR" (INTeR-
rogate) message.
Asgn Zero C$
The ASGN ZERO
4
(ASSIGN ZERO phase) key asslgns zero to the phase offset between
channel A and B (or between channel A and an external phase reference) wlthout chang-
ing the phase of the output waveforms The ASGN ZERO
4
key
IS
selected by pressmg
the blue SHIFT key prior to the PHASE key If channel A
IS
selected, the channel A
phase value
IS
changed to zero If channel B is selected, the phase offset value
IS
summed modulo 720 and stored in an internal phase offset regrster Subsequent
assignments
of zero phase sums the displayed phase value into the phase offset register
The stored phase offset value
IS
recalled with the CLR OFS key The OFS (phase
offset) indicator illuminates when a phase offset value
IS
stored
HP-IS Example
"ZPH"
Clr C$ Offset
The CLR
p
OFS (CLeaR phase OFfSet) key restores the channel B phase offset value
to the display without chang~ng the phase of the output waveforms. If the current chan-
nel B phase value is nonzero, the phase offset is summed to the phase value modulo
720 The CLR
4
OFS key is selected by pressing the blue SHIFT key prior to the
DC
OFFSET key The CLR
4
OFS key extinguishes the
4
OFS indicator Pressing the CLR
4
OFS key with channel A selected displays the message "Error 120 P OF" (Phase
OFfset).
HP-IB Example
"COF"