Instrument Tour
R&S
®
ZNA
25
Getting Started 1178.6456.02 ─ 05
Hardware options R&S
ZNA<frequency>-B16 "Direct Generator/Receiver Access",
provide 3 pairs of SMA connectors for each test port, where <frequency> corresponds
to the network analyzer type. For detailed ordering information, refer to the product
brochure.
These connectors give direct access to the RF input and output signal paths.
●
The Source Out signal comes from the internal RF signal source. The Source In
signal goes to the test port. A power amplifier can be inserted between Source Out
and Source In to boost the test port power.
●
The Ref Out signal comes from the coupler and provides the reference signal. The
Ref In signal goes to the receiver input for the reference signal.
●
The Meas Out signal comes from the coupler and provides the received signal (to
be measured). The Meas In signal goes to the receiver input for the measured sig-
nal.
Generator
PORT
Meas. Receiver
Ref. Receiver
Source Out
Ref Out
Meas Out
The direct generator/receiver access can be used to insert external components (exter-
nal signal separating devices, power amplifiers, extension units etc.) into the signal
path. This feature enables custom measurements, e.g. to test high-power devices or to
extend the dynamic range.
If no external components are connected, each Out/In loop must be closed using a
jumper.
Maximum input levels
The maximum RF input levels at all SMA inputs must not be exceeded.
In addition, it is important that the signal fed in at the SMA inputs contains no DC off-
set. A DC offset can impair the measurements and can even damage the instrument.
See the front panel labeling and the data sheet for applicable limits.
4.1.3.3
USB Connectors
The front panel offers four USB 3.0 connectors of type A (master USB).
The USB ports can be used to connect external devices, e.g.:
●
external PC accessories such as mouse or other pointing devices, a keyboard,
printer or external storage device (USB stick, CD-ROM drive etc.)
●
external measurement equipment such as calibration units, power meters, fre-
quency converters, extension units, signal generators, or switch matrices
Front Panel