LCX_UserManual_en_08_1.pdf - 第75页
Instrument functions R&S ® LCX Series 75 User Manual 1 179.2260.02 ─ 08 "V oltage Level" Sets the signal voltage. "Current Level" Sets the signal current. Remote command: VOLTage[:LEVel] on page 1…
Instrument functions
R&S
®
LCX Series
74User Manual 1179.2260.02 ─ 08
8.4 Test signal functions
In this context referred to as test signal parameters, these parameters consider all set-
tings the test signal is composed of. As the core parameters of a measurement, the
R&S LCX provides the access to these settings directly on the screen, and the settings
and function keys.
8.4.1 Test signal settings
With the "Settings" functions, you can define the main characteristics of the test signal.
Access:
1. For accessing the core parameters frequency, level, impedance range and bias,
you have the following options:
● Select the softkey of the corresponding parameter on the screen, e.g. "Fre-
quency:".
● Press the hardkey of the corresponding parameter at the front panel, e.g.,
[Freq.].
On-screen keypads open providing the corresponding entry fields for setting the
value and the unit of the selected parameter.
2. Enter the value and unit accordingly.
3.
Confirm with
.
The required remote commands are described in:
● Section 11.4, "Test signal commands", on page 185
● Section 11.11, "FUNCtion subsystem", on page 209
● Section 11.5, "BIAS subsystem", on page 188
Frequency: / [Freq.].......................................................................................................74
Level: / [Level]...............................................................................................................74
Range: / [Range]...........................................................................................................75
Current Bias: / [Bias Level]............................................................................................75
Voltage Bias: / [Bias Level]............................................................................................75
[Comp.]..........................................................................................................................75
[Bias Enable].................................................................................................................75
Frequency: / [Freq.]
Sets the test signal frequency.
Remote command:
FREQuency[:CW] on page 187
Level: / [Level]
Sets level of the AC test signal.
To select the parameter for the level setting, see "Test Signal Type" on page 80.
See "About measurement parameters" on page 76.
Test signal functions
Instrument functions
R&S
®
LCX Series
75User Manual 1179.2260.02 ─ 08
"Voltage Level"
Sets the signal voltage.
"Current Level"
Sets the signal current.
Remote command:
VOLTage[:LEVel] on page 188
CURRent[:LEVel] on page 187
Range: / [Range]
Selects the measurement range.
Remote command:
FUNCtion:IMPedance:RANGe:AUTO on page 211
FUNCtion:IMPedance:RANGe[:VALue] on page 211
Current Bias: / [Bias Level]
Sets the internal the current preload.
Remote command:
BIAS:CURRent[:LEVel] on page 188
Voltage Bias: / [Bias Level]
Sets the value of the internal voltage preload.
Remote command:
BIAS:VOLTage[:LEVel] on page 189
[Comp.]
Accesses the "Open/Short/Load Correction" dialog, see Section 8.6.1, "Measurement
parameter settings", on page 78.
[Bias Enable]
Enables the internal voltage or current bias.
Remote command:
BIAS:STATe on page 189
8.5 Measurement control functions
With the measurement control hardkeys at the front panel, you can control a running
measurement.
Access:
► Press the corresponding key ([Auto], [Hold] or [Trig.]) at the front panel.
Repeated pressing the [Hold] key turns the function on and off (toggle). The [Auto]
and the [Trig.] keys trigger the corresponding event.
The required remote commands are described in Section 11.11, "FUNCtion subsys-
tem", on page 209.
Measurement control functions
Instrument functions
R&S
®
LCX Series
76User Manual 1179.2260.02 ─ 08
[Auto].............................................................................................................................76
[Hold].............................................................................................................................76
[Trig.]............................................................................................................................. 76
[Auto]
Selects measurement function and the related default measurement pairs automati-
cally, according to the connected sample component.
For an overview of the impedance measurement parameters the R&S LCX provides,
see Section 5.2, "Impedance measurement parameters of the R&S LCX", on page 50.
Remote command:
FUNCtion:MEASurement:AUToselect on page 213
[Hold]
Freezes the currently set range.
When enabled, the R&S LCX displays the prefix "Hold:" at the range value.
Remote command:
FUNCtion:IMPedance:RANGe:HOLD on page 211
[Trig.]
Triggers one measurement cycle manually.
Remote command:
*TRG on page 185
TRIGger[:IMMediate] on page 243
8.6 Measurement parameters
The settings described in this section refer to parameters that you can configure for
your specific measurement in addition to the test signal, measurement mode, or mea-
surement functions.
About measurement parameters
Aspects on the measurement parameters:
●
Speed
The measurement speed defines the number of measurements in one second
when triggered continuously.
Impact of measurement speed and accuracy:
The measurement accuracy decreases with increasing speed, i.e. the higher the
number of measurements per second you perform, the lower the measurement
accuracy you can expect.
At low test signal frequencies, the R&S LCX reduces the measurement speed
automatically.
See "Speed" on page 80.
●
Cable length
Any cable covers inductive and capacitive parts, which depend in particular on the
cable length. As these characteristics are considered as parasitics, they distort a
Measurement parameters