R&S ZVB - Page 325

R&S
®
ZVA / R&S
®
ZVB / R&S
®
ZVT GUI Reference
Channel Menu
Operating Manual 1145.1084.12 – 30 310
 Linear frequency sweep or segment within segmented sweep from 100 MHz to 112 MHz
 4 sweep points resulting in a frequency spacing of 4 MHz
 Minimum frequency offset in the range from 0 Hz to 4 MHz (all values in this range will lead to the
exact same measurement)
 4 port groups
In this example it is assumed that the firmware will choose the actual offsets as shown in column
"Generator Offset" of the following table; this choice depends on the IF and may not be used in all
circumstances. Please note that the first port group does not use an offset.
Internally, in this example the firmware has to perform measurements at seven measurement points
(labeled "MP 1" through "MP 7" in the following table) to obtain the four measurement points requested by
the user. The following table shows for each of the seven measurement points which port group is driving
and measuring at which frequency. An entry of "-" means that no measurement is taking place at the
according measurement point for the according port group. At these points the ports of the port group
which is not measured will be switched off in a manner which corresponds to a fast RF Off.
Port Group
Generator Offset
MP 1
MP 2
MP 3
MP 4
MP 5
MP 6
MP 7
1
0 MHz
-
100 MHz
104 MHz
108 MHz
112 MHz
-
-
2
+4 MHz
100 MHz
104 MHz
108 MHz
112 MHz
-
-
-
3
-4 MHz
-
-
100 MHz
104 MHz
108 MHz
112 MHz
-
4
-8 MHz
-
-
-
100 MHz
104 MHz
108 MHz
112 MHz
On the user level the firmware will provide for each port group only those four measurement points that
were requested by the user; at this level measurement point 1 will for all port groups contain the
measurement results taken at 100 MHz, measurement point 2 will contain the results taken at 104 MHz
and so forth. The measurement pattern displayed in the table above only explains the internal mechanism
of Simultaneous Measurement with Frequency Offset and is included in this manual to show how the
firmware ensures that in each simultaneous measurement all measurements from different port groups
are separated by a frequency difference whose absolute value is equal to or greater than the minimum
frequency offset.
Remote
control:
SOURce<Ch>:GROup:SIMultaneous:FOFFset[:STATe] ON | OFF
SOURce<Ch>:GROup:SIMultaneous:FOFFset:MOFFset:MODE DIRect |
BANDwidth
SOURce<Ch>:GROup:SIMultaneous:FOFFset:MOFFset:BWFactor
SOURce<Ch>:GROup:SIMultaneous:FOFFset:MOFFSet:DVALue
SOURce<Ch>:GROup:SIMultaneous:FOFFset:CONDition?
Mixer Measurements
Scalar Mixer Meas
The Scalar Mixer Meas submenu controls the measurement of the mixing products generated by the
mixer under test (MUT) when supplied with two independent RF signals. Together with the Harmonic
Distortion measurement and the arbitrary configuration of generator and receiver frequencies (Port
Configuration), the scalar mixer mode is included in option R&S ZVA-K4. An extension to a two-stage
mixer system is possible; see Test Setup with Two Mixers below.
Mixer Measurements