Concepts and features
R&S
®
ZNA
304User Manual 1178.6462.02 ─ 29
With two independent internal RF sources (and the Internal combiner), the R&S ZNA
can generate (and combine) two-tone stimuli without the need for an additional genera-
tor (and combiner). Using Direct generator/receiver access, the upper-tone port can
serve as receiving port in intermodulation and two-tone group delay measurements.
And, with two independent internal RF sources the R&S ZNA can generate phase
coherent or true differential source signals.
The additional second LO source enables measurements with two frequency convert-
ers, and many additional Frequency conversion measurements without the need for
additional (external) generators. The LO Out (option R&S ZNA-B8) can also serve as
additional source.
4.7.24 Memory extension for data streaming
R&S ZNA-B7
Hardware option R&S ZNA-B7 comprises an additional memory board, that is exclu-
sively used for buffering data of the measurement and reference receivers. Compared
to the standard memory, the buffering speed is twice as high.
This high-speed memory is particularly useful for Pulsed measurements, because a
high time resolution requires a high IF bandwidth and hence a large amount of data to
be buffered. The "Pulse Profile" sweep type uses the R&S ZNA-B7, if available.
The doubled memory speed also doubles the number of wave quantities that can be
measured simultaneously at a given bandwidth. The following table presents optimum
values.
IF BW
(MHz)
Time resolution
(ns)
Simultaneously measured wave quantities
2 4 8 16
0.1 552
✓
✓ ✓ ✓
0.15 368 ✓ ✓ ✓ with B7
1 48 ✓ ✓ ✓ with B7
1.5 32 ✓ ✓ ✓ with B7
2 24 ✓ ✓ with B7
10 16 ✓ ✓ with B7
15 16 ✓ ✓ with B7
20 8 ✓ with B7
30 8 ✓ with B7
The number of wave quantities that are required to measure a certain quantity,
depends on the setup and the calibration. E.g., a calibrated gain measurement with
"One Path Two Ports" calibration requires the simultaneous measurement of three
wave quantities.
Optional extensions and accessories
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