This subsystem sets frequency-related parameters, especially the measurement and display ranges for the different sweep types, and controls the frequency-converting measurement modes (harmonic distortion, mixer mode, etc.).
The frequency ranges for the different instrument models are listed below:
|
|
ZVB4 |
ZVB8 |
ZVB14 |
ZVB20 |
|
Start, Stop |
300 kHz to 4 GHz |
300 kHz to 8 GHz |
10 MHz to 14 GHz |
10 MHz to 20 GHz |
|
Center |
> 300 kHz to < 4 GHz |
> 300 kHz to < 8 GHz |
> 10 MHz to < 14 GHz |
> 10 MHz to < 20 GHz |
|
Span |
2 Hz to 3.9997 GHz |
10 mHz to 7.9997 GHz |
10 mHz to 19.99 GHz |
10 mHz to 19.99 GHz |
Use SYSTem:FREQuency?
MINimum | MAXimum.
to query the frequency range of your analyzer.
Command tree: [SENSe<Ch>:]FREQuency
:AWReceiver
:DEVice
:HARMonic (commands for harmonic distortion measurement)
:MIXer...(commands for mixer measurement)
:IMODulation (commands for intermodulation measurement)
:OFFSet
Note: For a frequency sweep the range can be defined alternatively by a combination of Start/Stop frequencies or a Center frequency and Span. In fixed frequency mode (power sweep or Time/CW Mode; see [SENSe<Chn>:]FUNCtion[:ON]) the measurement frequency is set by means of [SENSe<Ch>:]FREQuency:CW|FIXed.
Defines the center of the measurement and display range for a frequency sweep.
|
<Ch> |
Channel number. If unspecified the numeric suffix is set to 1.
|
|
<center_frequency> |
Center frequency of the sweep. |
|
Range [def. unit] |
Depending on the instrument model [Hz]. The increment (parameters UP or DOWN) is 0.1 kHz. |
|
*RST value |
Center of the analyzer's maximum frequency range: (fMIN + fMAX)/2
|
|
SCPI, Command Types |
Confirmed, command or query.
|
|
Example: |
FUNC "XFR:POW:RAT B1, A2" Activate a frequency sweep and select the ratio B1/A2 as measured parameter for channel and trace no. 1.
Set center frequency to 100 MHz.
Set frequency span to 50 kHz.
|
The
measurement range defined by means of the center frequency and the current
span ([SENSe<Ch>:]FREQuency:SPAN)
must not exceed the allowed frequency range of the analyzer. If necessary,
the span is reduced to min (Center –
fMIN, fMAX –
Center).
SHARmonic | THARmonic
| MIXer Enables the measurement of a harmonic or the fundamental signal for channel <Ch>.
Enabling
a harmonics measurement also resets the measured quantity; see program
example below.
|
<Ch> |
Channel number.
|
|
FUNDamental |
Measurement of the fundamental signal (no frequency-converting mode). |
|
HARMonic |
Harmonics measurement. The order of the measured harmonic, the source port, and the receive port must be selected using the [SENSe<Ch>:]FREQuency:CONVersion:HARMonic... commands; see example below. |
|
SHARmonic | |
Measurement of the 2nd or 3rd harmonic with source port 1 and receive port 2. These parameters have been introduced for compatibilty with the ZVR. While they are active, a query returns HARM. |
|
MIXer |
Scalar mixer mode. The mixer mode is configured using the [SENSe<Ch>:]FREQuency:CONVersion:MIXer... commands. |
|
*RST value |
FUNDamental
|
|
SCPI, Command Types |
Device-specific, command or query. Returned values: FUND or HARM.
|
|
Example: |
*RST; FREQ:STAR 0.5E+9; STOP 1E+9 Reset the analyzer (activating a frequency sweep) and set the sweep range between 1 GHz and 1.1 GHz. FREQ:CONV:HARM:ORD 4; SPOR 1; RPOR 2 Configure a 4th harmonic measurement with source port 1 and receive port 2. The measurement is still not enabled. FREQ:CONV HARM Enable the configured harmonic measurement. CALC:PAR:MEAS? "TRC1" Query the measured quantity. The analyzer measures the wave quantity b2, the response is 'B2D1SAM'. FREQ:CONV:HARM:RELative ON Enable the relative harmonic measurement, creating a new channel and a new trace Trc2. CALC2:PAR:MEAS? "TRC2" Query the measured quantity in the new channel no. 2. The analyzer still measures the wave quantity b2, the response is 'B2D1SAM'. CALC2:MATH:STAT? Check whether the active trace in channel no. 2 (i.e. Trc2) is a mathematical trace: the response is 1.
|
Qualifies whether a-waves (outgoing waves) are measured at the source or at the receiver frequency. The setting is relevant for all frequency-converting measurements.
|
<Ch> |
Channel number.
|
|
<Boolean> |
OFF - Measurement at source frequency |
|
*RST value |
OFF
|
|
SCPI, Command Types |
Device-specific, command or query.
|
|
Example: |
FREQ:CONV:AWR ON Measure a waves at the receiver frequency.
|
Selects the test setup (internal or external sources) for the frequency converter measurement (with option ZVA-K8, Converter Control).
|
<Ch> |
Channel number. This suffix is ignored because the device mode is a global setting.
|
|
Parameters |
RILI - Measurement at source frequency |
|
*RST value |
RILI
|
|
SCPI, Command Types |
Device-specific, command or query.
|
|
Example: |
FREQ:CONV:DEV:NAME 'ZVA-Z110' Select frequency converter type R&S ZVA-Z110. SYST:COMM:RDEV:GEN1:DEF 'Ext. Gen. 1', 'SME02', 'gpib0', '21' Configure an R&S SME02 generator as external generator no. 1, assigning the name Ext. Gen. 1 and a GPIB address 21. FREQ:CONV:DEV:MODE RILE Measure a waves at the receiver frequency.
|
Selects the frequency converter type for enhanced frequency-converting measurements (with option ZVA-K8, Converter Control).
|
<Ch> |
Channel number. This suffix is ignored because the converter type is a global setting.
|
|
'<Converter Type>' |
'ZVA-Z110' - Frequency converter R&S ZVA-Z110 |
|
*RST value |
OFF
|
|
SCPI, Command Types |
Device-specific, command or query.
|
|
Example: |
See [SENSe<Ch>:]FREQuency:CONVersion:DEVice:MODE
|
Defines power coefficients for frequency converters R&S ZVA-ZxxxE.
|
<Ch> |
Channel number. This suffix is ignored because converter settings are global.
|
|
<Port> |
NWA port number
|
|
<C0>, <C1>, <C2>, C3> |
Coefficient of order 0, 1, 2, and 3. |
|
Range [def. unit] |
-500 to +500 [–]. |
|
*RST value |
Depending on the individual converter
|
|
SCPI, Command Types |
Device-specific, command or query.
|
|
Example: |
|
Enables or disables default power coefficients for frequency converters R&S ZVA-ZxxxE.
|
<Ch> |
Channel number. This suffix is ignored because converter settings are global.
|
|
<Port> |
NWA port number. This suffix is ignored because the command affects all ports.
|
|
<Boolean> |
ON - Use default power coefficients |
|
*RST value |
ON
|
|
SCPI, Command Types |
Device-specific, command or query.
|
|
Example: |
FREQ:CONV:DEV:NAME 'ZVA-Z110E' Select frequency converter type R&S ZVA-Z110E. FREQ:CONV:DEV:PCO3:DEF OFF FREQ:CONV:DEV:PCO3 0.5479,0.03426,-0.002866,2.124E-006 Re-define the power coefficients for port 3 according to the connected converter unit. FREQ:CONV:DEV:PCO3:DEF ON Use default power coefficients for all ports. FREQ:CONV:DEV:PCO3? Query the default power coefficients for port 3. The analyzer returns the predefined values (generally different from the coefficients entered above).
|
Selects the order of the harmonic measured if a harmonic measurement is enabled ([SENSe<Ch>:]FREQuency:CONVersion HARMonic).
|
<Ch> |
Channel number.
|
|
<order> |
Order of the harmonic, integer multiple of the fundamental frequency measured. |
|
Range [def. unit] |
2 to 100 [–]. |
|
*RST value |
2
|
|
SCPI, Command Types |
Device-specific, command or query.
|
|
Example: |
|
Enables or disables the relative harmonic measurement where the harmonic is divided by the fundamental wave.
With enabled relative measurement the analyzer
creates a new channel and a new (mathematical) trace; see program example
for [SENSe<Ch>:]FREQuency:CONVersion.
|
<Ch> |
Channel number.
|
|
<Boolean> |
Enable (ON) or disable (OFF) the relative harmonic measurement. |
|
*RST value |
OFF
|
|
SCPI, Command Types |
Device-specific, command or query.
|
|
Example: |
|
Selects the receive port for the harmonic measurement.
|
<Ch> |
Channel number.
|
|
<port_no> |
Integer port number. |
|
Range [def. unit] |
Depending on the analyzer model [–]. |
|
*RST value |
2
|
|
SCPI, Command Types |
Device-specific, command or query.
|
|
Example: |
|
Selects the source port for the harmonic measurement.
|
<Ch> |
Channel number.
|
|
<port_no> |
Positive integer analyzer port number. |
|
<ext. gen. no.> |
Negative integer external generator number (the minus sign serves as an identifier for external generators; –1 denotes the external generator no. 1) |
|
Range [def. unit] |
Depending on the analyzer model and the number of external generators [–]. |
|
*RST value |
1
|
|
SCPI, Command Types |
Device-specific, command or query.
|
|
Example: |
|
