3152A User Manual
SCPI and HS Command Reference 4-20 Racal Instruments
©
2001
Command and Parameters
Low Limit
High Limit
Default
PHASe:LOCK
{OFF
|
ON}
OFF
PHASe:ADJust <value>
0
360 (*)
0
PHASe:SOURce
{MASTer
|
SLAVe}
SLAV
PHASe:NULL
(*) High phase offset limit is not always 360
o
. It depends on
the number of points that were assigned to the active memory
segment. Phase offset limits are specified in
Appendix A.
Front-Panel PLL
Command
Summary
Front-panel PLL commands control the PLL mode and the
phase offsets with respect to an external reference. If the
Model 3152A is placed in PLL mode, it can be used as a slave
only. After lock, the synthesizer’s output frequency is exactly
equal to the frequency of the reference signal.
The commands are presented exactly as they should be typed
in your program. Optional nodes were omitted from these
commands. Factory defaults after *RST or front panel reset are
shown in bold typeface. Parameter low and high limits are
given where applicable.
Command and Parameters
Low High Default
Limit Limit
PLL:LOCK {OFF | ON}
OFF
PLL:ADJust <value>
-180 180
0
PLL:FINE <value>
-36.00 36.00
0
The PLL:FINE adjustment is always relative to the PLL:ADJ
setting. For instance, programming PLL:ADJ 120 and
PLL:FINE –1.55 will generate a phase offset of 118.45
degrees. Note that the PLL lock range depends on the
number of waveform samples, sampling frequency and
external reference frequency. The relationship between these
parameters is show in
Appendix A
.
