R&S ZNB Series User Manual page 237

®
R&S ZNB/ZNBT
In this example, the transmission parameter S
gain.
Before measuring, the port frequencies must be set appropriately. In the port configura-
tion table (Channel – [Channel Config] > "Port Config" > "Port Settings..." > "Arb Fre-
quency"), the (source) frequency of Port 1 is set to the desired RF frequency (here: the
channel base frequency/sweep range f
lus signal at 1 GHz. To measure the up-converted IF signal, the (receive) frequency at
Port 2 is set to f
Independent source powers for Port 1 and Gen1 can be configured in addition, if so
desired.
Internal Second Source
If an internal second source is available, the mixer measurements outlined above (and
many other measurements) can be performed without an additional external generator;
see Chapter 4.7.14, "Internal second
limited source connectivity (described there).
User Manual 1173.9163.02 ─ 62
VNA
1
RF
LO
f = f
IF, up RF
f = | f
IF, down
+ 1 GHz.
b
Optional extensions and accessories
2
IF
+ f
LO
- f |
RF LO
corresponds to the mixer's conversion
21
). An external generator provides a fixed stimu-
b
source", on page 255. However, be aware of the
Concepts and features
237