3152B User Manual
Publication No. 980935 Rev. A
5-106 Programming Reference
EADS North America Test and Services
PHASe2:LOCK:SOURce {EXTernal|TTLTrg<n>|LBUS<n>|ECLTrg0}(?)
HS Syntax: 0930A<1|2>(?)
Description
This command will select the source for the PLL function. Source options are: External signal, applied to the
front panel PLL IN connector; Trigger signals, applied through the backplane trigger lines; or, trigger signal
applied through the ECLT0 line. While the last two options have fixed logic levels, the front panel input may
accept various levels, including such levels that reside on offsets.
Parameters
Name
Type
Default
Description
EXTernal
Discrete
EXT
Will select the front panel PLL IN input as the reference
signal. The input can be programmed for trigger level, to
adjust the threshold and for slope, to define the reference
slope.
TTLTrg<n>
Discrete
Will select one of the backplane trigger lines (TTLTrg 0
through 7) as the reference input.
LBUS<n>
Discrete
Will select the backplane LBUS<n> line as the reference
input.
ECLTrg<n> Discrete
Will select the backplane ECLTrg0 line as the reference
input.
Response
The 3152B returns EXT, TTLT<n>, or ECLT0 depending on the selected PLL reference source setting.
PHASe2:ADJust <phase>(?)
HS Syntax: 0900A<float>(?)
Description
Programs the phase offset between the reference input and the 3152B output. The output start phase is
shifted in reference to the external signal.
Parameters
Name
Range
Type
Default
Description
<phase>
-180 to 180
Numeric
0
Programs the phase offset between the reference and
the output waveform. The phase is programmed in
units of degrees (
°
). Note however, that the phase
offset resolution depends on the number of points that
create the waveform. For example, waveform that is
made of 1024 points can be shifted with increments of
0.35
°
, but another waveform that has only 100 points
can be shifted with increments of 3.6
°
.
Response
The 3152B returns the current phase offset value in units of degrees.
PHASe2:FINE <fine_phase>(?)
HS Syntax: 0910A<float>(?)
Description
Programs the phase offset between the reference input and the 3152B output in smaller increments. The
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