User`s guide

4-156 Agilent E6432A Microwave Synthesizer User’s Guide
HPE6432_SetAlcAtten
ViStatus HPE6432_SetAlcAtten (ViSession instrumentHandle,
ViReal64 alcPower, ViUInt16 attenuation);
Purpose
This function sets the current ALC power level and attenuation of the
output while all other instrument states remain unchanged.
This function uses the compound frequency+power function (Set Freq,
ALC, Atten) to set the synthesizer by remembering and sending the
current value for frequency along with user-specified values for ALC
power level and attenution.
The ALC power and attenuation values are applied to the synthesizer
without incurring the additional setup time associated with setting
frequency or with setting power and attenuation separately.
Factory Preset Values:
ALC Power = –10 dBm
Attenuation = 70 dB
NOTE When in high band, ALC switching speed can be maximized with
minimum settling and dwell times while using the fastest interface and
computer available. Examples are shown below of the average ALC
switching times required to set the ALC using different interfaces and
different speed computers.
Parameter List
instrumentHandle
Variable Type ViSession
This is the ViSession handle that is obtained from the Initialize
function. The instrumentHandle identifies a particular instrument
session.
alcPower
Variable Type ViReal64
PII-400/MXI-2 P-200/MXI-2 P-150/MXI-2
0.35 ms 0.5 ms 0.6 ms
PII-400/FireWire P-90/FireWire
2.0 ms 5.1 ms