PHASe Subsystem
l The primary purpose of this command is to establish a zero-point betweentwo connected instruments. For chan-
nel-to-channel operation on a two-channel instrument, use PHASe:SYNChronize.
l Setting a new zero-phase reference point means that the value subsequently returned by a PHASe? query com-
mand is reset to "0", but the output waveform itself does not change.
[SOURce[1|2]:]PHASe:SYNChronize
Simultaneously resets all phase generators in the instrument, including the modulation phase generators, to establish
a common, internal phase zero reference point. This command does not affect PHASe setting of either channel; it
simply establishes phase difference between channels as the sum of SOUR1:PHAS and SOUR2:PHAS instead of an arbi-
trary amount.
Parameter Typical Return
(none) (none)
Reset all phase generators:
PHAS:SYNC
l SOURce1 and SOURce2 mean nothing for this command.
l This command breaks the phase relation with another instrument, because it resets the phase generators.
l In single channel instruments, this synchronizes the main channel with the internal modulation generator.
l You can synchronize the phase between the primary signal and the SUM signal by sending SOURce[1|2]:PH-
ASe:SYNChronize after setting the functions for the primary signal and the SUM signal. Otherwise, the phase
between the two signals is arbitrary.
[SOURce[1|2]:]PHASe:UNLock:ERRor:STATe {ON|1|OFF|0}
[SOURce[1|2]:]PHASe:UNLock:ERRor:STATe?
Enables or disables the generation of an error if the phase-lock is ever lost by the instrument timebase. The instru-
ment uses one timebase for both channels.
Parameter Typical Return
{ON|1|OFF|0},defaultOFF 0(OFF)or1(ON)
Enable the generation of phase-lock errors:
PHASe:UNLock:ERRor:STATe ON
l SOURce1 and SOURce2 mean nothing for this command.
l If the phase-lock is lost and the error is enabled, a "Reference phase-locked loop is unlocked" error is generated.
l Volatile setting, lost on power cycle.
l A faulty reference signal applied to the 10 MHz IN connector may generate many error messages.
266 Agilent 33500 Series Operating and Service Guide
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