![Agilent Technologies E1439 Скачать руководство пользователя страница 192](http://html1.mh-extra.com/html/agilent-technologies/e1439/e1439_user-manual_2868333192.webp)
182
Agilent E1439 Programmer's Reference
Functions listed alphabetically
age1439_trigger_phase_actual_get
Returns a representation of the phase value of the LO at the most recent trigger point.
VXI
plug&play
Syntax
#include "age1439".h
ViStatus age1439_trigger_phase_actual_get(ViSession
id
, ViPInt16
actualPhasePtr
);
Parameters
id
is the VXI instrument session pointer returned by the
age1439_init
function.
actualPhasePtr
points to the returned value which is an integer from
−
32768 to 32767 and should be interpreted as
follows:
AGE1439_TRIG_PHASE_0
represents 0 degrees (or 0)
AGE1439_TRIG_PHASE_90
represents 90 degrees (or 16384)
AGE1439_TRIG_PHASE_180
represents ±180 degrees (or -32768)
AGE1439_TRIG_PHASE_270
repr270 (-90) degrees (or -16384)
In other words, each count represents 360/65536 degrees of phase.
To convert the returned phase value to degrees, multiply the returned value by 360/65536.
In multiple module systems, the actual phase of the triggering module should be used to correct
data from other modules in the system.
The returned phase value represents the digital LO’s phase at the time of the actual trigger. This
time may vary from the time of the desired trigger by the value returned by
age1439_trigger_
delay_actual_get
.
The LO phase could be used in time domain averaging of blocks, or other operations involving
zoomed blocks of data, so that the varying phase of the LO can be removed from the calculation.
Return Value
AGE1439_SUCCESS
indicates that a function was successful.
Values other than
AGE1439_SUCCESS
indicate an error condition or other important status
condition. To determine the error message, pass the return value to
“age1439_error_message” on
page 102
.
See Also
“age1439_init” on page 132
,
“age1439_trigger_setup” on page 183
,
“age1439_trigger_delay_
actual_get” on page 181
,
“age1439_frequency_setup” on page 128
,
“Delay and phase in triggered
measurements” in chapter 3
,
“Trigger and phase in multi-module systems” in chapter 3
Содержание E1439
Страница 6: ...6...
Страница 10: ...10 Contents...
Страница 11: ...1 1 Installing the Agilent E1439...
Страница 18: ...8 Installing the Agilent E1439 To transport the module...
Страница 19: ...2 2 Getting Started with the Agilent E1439...
Страница 28: ...18 Getting Started with the Agilent E1439 To use the example programs...
Страница 29: ...3 3 Using the Agilent E1439...
Страница 63: ...4 4 Agilent E1439 Programmer s Reference...
Страница 217: ...5 5 Module Description...
Страница 228: ...218 Module Description Block diagram and description...
Страница 229: ...6 6 Replacing Assemblies...
Страница 234: ...224 Replacing Assemblies Replaceable parts To remove the top cover...
Страница 235: ...225 Replacing Assemblies Replaceable parts To remove the M1 M2 assemblies...
Страница 236: ...226 Replacing Assemblies Replaceable parts...
Страница 238: ...228...
Страница 244: ...Index 234...