Rohde & Schwarz 1145.1010.04/05/06, Operating Manual

Page: 726 / 813

SOURce<Ch>:... R&S
®
ZVA/ZVB/ZVT
1145.1084.12 6.264 E-6
SOURce<Ch>:FREQuency<Pt>:CONVersion:ARBitrary:IFRequency
<numerator>, <denominator>, <offset>, CW | FIXed | SWEep
Defines the port-specific source frequency for frequency-converting measurements. The source
frequency is either a range (for frequency sweeps) or a CW frequency (for power, time and
CW Mode
sweeps).
<Ch> Channel number.
<Pt>
Test port number of the analyzer. Note that the source frequencies
at ports 1/2 and at ports 3/4 must be the same.
<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 sweep range (for frequency sweeps,
parameter SWEep). For power, time and CW Mode sweeps
(parameters CW or FIXed), f
b
= 0.
The conversion formula for f
s
is ZVR-compatible but differs
from manual control where the ratio
<numerator>/<denominator> also multiplies the <offset>. 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] The converted frequency or frequency range must be within the
analyzer's frequency range, depending on the instrument model
[Hz]. In addition the following restrictions apply:
<numerator> – Values are rounded to positive or negative integer
numbers; zero is not allowed [1]
<denominator> – Values are rounded to positive integer numbers [1]
<offset> – Values are rounded to (positive or negative) multiples of 1
Hz [Hz].
*RST value The default frequency/frequency range corresponds to the sweep
range or CW frequency of the analyzer, i.e.
<numerator> = <denominator> = 1
<offset> = 0 Hz
Sweep type
Parameters
SWEep – A frequency sweep is active, the command defines a
frequency range.
CW | FIXed – A power, time or
CW Mode sweeps is active, the
command defines a fixed frequency.
*RST value SWEep
SCPI, Command
Types
Device-specific, command or query
Example:
*RST; FREQ:STAR 1E+9; STOP 1.1E+9
Reset the analyzer (activating a frequency sweep) and set the
sweep range between 1 GHz and 1.1 GHz.
SOUR:FREQ2:CONV:ARB:IFR 2, 1, 1E+9, SWE
Convert the source frequency at test port no. 2 to the range between
3 GHz and 3.2 GHz. The frequency setting is also valid for port 1.