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program will prevent range errors.
4.4.4 Frequency Response Restrictions
The user may create a waveform that contains any number of harmonic frequencies of the
fundamental. The AC Source itself however has a finite signal bandwidth and will attenuate higher
frequency components of the signal. To limit the maximum frequency component of the output signal,
the controller automatically applies a band-pass filter to all custom waveforms as they are
downloaded. The controller implements the following process for user-defined waveforms:
Each downloaded waveform will have a computed frequency limit that is less than or equal the
maximum frequency limit of the AC source. The frequency limit is a function of the harmonics content
of the waveform and will follow the equation below.
Fmaxh = Fmax/(level * hn)
Where:
California Instruments 81
User Manual Compact i/iX Series
Fmaxh is th
Fmax is the upper frequency lim
e maximum allowable fundamental frequency that can be programmed
it of the power source
This value Fmaxh is evaluated for all the harmonic components in the downloaded waveform and the
d as the computed upper fundamental frequency limit that may be used with
this specific waveform.
orm will be rejected at down load time and
the label will be deleted from the waveform catalogue.
If the iX Series is used over the bus, th y command can be used to determine
t allowable fundamental f form. Using the returned value
as part of a program will prevent range errors.
Limits assume a program of full-scale voltage. No adjustments for voltage setting are made below the
full-scale value.
W ction and frequency pro e above limit. An error message
will be generated to reflect this type of error:
form harmonics limit"
T will also generate the above error du entry. Remote transient entry will
not check for the error until transient e
4.4.5 Sw eforms
Level is the percentage of the harmonic with respect to the fundamental expressed as a
fraction (e.g. 10% = 0.1)
hn is the harmonic number, e.g h11 is the 11th harmonic or hn = 11.
lowest result is assigne
If Fmaxh is below the minimum frequency limit, the wavef
e “:FREQ? MAX” quer
he maximum requency for the selected wave
aveform sele gramming will be subject to th
"22,Wave
ransient editing ring keyboard
xecution.
itching Wav
W s can be switched as part of the e setup menu has a
UNC field. This field allows selection of any of the standard or custom waveforms available in
switch
aveform transient system. Each transient typ
F
waveform memory. Refer to the section on transients for more details on using transient list to
output waveforms.
California Instruments 82
User Manual Compact i/iX Series
4.5 Measurements
Standard measurement
measurements are spread across multiple screens
s are always available through the Meas key on the front panel. These
to enhance readability. Switching between these
the
4.5.1 B
screens can be done by successively pressing the Meas button on the front panel. This will cause
screen to cycle through all available measurement screens.
asic Measurements
The following three measurement screens are available:
Parameter
MEASUREMENTS 1
VOLTAGE AC rms voltage
CURRENT AC rms current
FREQUENCY Frequency
POWER Real power
MEASUREMENTS 2
VA POWER Apparent power
VAR POWER Reactive power
POWER FACT Power factor
CREST FACT Crest factor
MEASUREMENTS 3
VOLT THD Voltage distortion
CURR THD Current distortion
PEAK CURR Highest AC current found
PHASE Phase angle (relative to phase A)
ion calculations are based on H2 through H50 with the fundamental
iX Series programming
man P/N
Mea ts
for display, the p measurement parameters before displaying the
requ scree
scre media
invalid or blank
Not AC C offset will not be reported.
rations
Note: The V and I distort
component (H1) in the denominator. A RMS referenced calculation may be selected by sending the
“MEAS:THD:MODE FUND” command over the USB or GPIB interface. See i/
ual (CI 6005-961) for details.
suremen are always running in the background. When the user selects a measurement screen
ower source first updates all the
ested n. Consequently, pressing the MEAS key may not always bring up the selected
en im tely. There will be a perceptible delay. This will prevent the screen from appearing with
readouts.
e that in mode, all measurements are AC coupled only so any D
4.5.2 Accuracy Conside
Any measurement system has a finite accuracy specification. Measurement specifications are listed i
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