R&S ZVB - Page 991

R&S
®
ZVA / R&S
®
ZVB / R&S
®
ZVT Command Reference
SCPI Command Reference
Operating Manual 1145.1084.12 – 30 976
SOURce<Ch>:FREQuency<Pt>:CONVersion:ARBitrary:CFRequency <numerator>,
<denominator>, <offset>, CW | FIXed | SWEep
Defines the converter source frequency at the converter port <Pt>. This command is available for
frequency converters with electronic attenuators R&S ZVA-ZxxxE. The converter source frequency is
either a range (for frequency sweeps) or a CW frequency (for power, time and CW Mode sweeps). It is
used as a reference during power calibration.
The frequency formula is applied even if the analyzer returns an error message, because the
frequency is outside the allowed range.
<Ch>
Channel number.
<Pt>
Test port number of the analyzer.
<numerator>
<denominator>
<offset>
Parameters of the frequency formula. The source frequency f
s
is calculated
according to
f
s
= <numerator>/<denominator>*f
b
. + <offset>
where f
b
represents the channel base frequency (parameter SWEep). For
parameters CW or FIXed, f
b
= 0.
In manual control, the <offset> is defined as a product of a ratio of two
integers times a multiple of 1 Hz.
Range [def.
unit]
For consistency the converter source frequency or frequency range should be an
integer multiple of the source frequency at the analyzer port
(SOURce<Ch>:FREQuency<Pt>:CONVersion:ARBitrary:IFRequency). The
multiplier must be equal to the selected harmonic order
(<denominator>/<numerator>); see example below. In addition the following
restrictions apply:
<numerator> – Values are rounded to positive or negative integer numbers [1]
<denominator> – Values are rounded to positive integer numbers [1]
<offset> – Values are rounded to (positive or negative) multiples of 1 Hz [Hz].
The selected converter source frequency must be within the nominal frequency
range of the frequency converter, otherwise an error message "–222, Data out of
range..." is generated.
*RST value
The default frequency/frequency range corresponds to the frequency range or
start frequency of the converter, i.e.
<numerator> = <denominator> = 1
<offset> = 0 Hz
Sweep type
Parameters
SSWEep – The full formula is applied. For frequency sweeps, the command
defines a sweep range.
CW | FIXed – The reduced formula with f
b
= 0 is applied. f
r
= <offset>; the
command defines a fixed frequency.
*RST value
SWEep
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:MODE RILI
Select internal RF and source frequencies.
FREQ:STAR 7.5E+10; :STOP 1E+11