PHASe
The command is :PHASe followed
by
a decimal value representing
the amount (in degrees of angle) of phase shift required between the
output signal, and an external reference signal.
Another synthesized function generator (for example, another
HP E1440A or an HP 33248, can be synchronized with the
HP E1440A (or vice versa). Either a reference frequency signal
from the other instrument is connected to the external frequency
reference input of the
HP
E1440A
,
or the signal from the output of
the HP E1440A is connected to the other instrument. Changing the
phase of the
HP
E1440A will then cause the phase between the two
instruments to change accordingly.
Note
In
this case the phase relationships of the two instruments are not
calibrated, just locked.
For square wave frequencies below 25 kHz, phase changes greater
than
25'
may result in a phase shift of
f
180' from the desired
amount.
The phase limit is
f
720.0°, with a resolution of 0.1'
After entering
a
phase shift, the new phase may be assigned the
zero-phase position; subsequent changes in phase are made with
reference to this value.
Value
Coupling
General
Value coupled commands are managed by means of command groups
as illustrated in Table 4-5 and Figure 4-3.
Understanding
the
HP
E1440A
4-9
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