Concepts and features
R&S
®
ZNB/ZNBT
254
User Manual 1173.9163.02 ─ 62
Reference information for both protocols is available on the R&S
ZNB/ZNBT at the
address
http://<instrument>/api/hums/v1/documents?name=<interface>
.
For
<instrument>
, enter the hostname or the IP address of your instrument, as for
access to the GUI.
For
<interface>
=
snmp
, you get a
.zip
file containing the MIB files for SNMP. For
<interface>
=
rest
, you get a web page with the OpenAPI specification of the REST
API.
For further information about the HUMS service itself, see the R&S HUMS user man-
ual.
4.7.13
Bias tees (R&S
ZNB only)
Bias tees are used to apply external DC voltages (biases) to the RF ports of the
R&S
ZNB. They are provided as additional rear panel BNC inputs (labeled PORT BIAS
1, 2,...).
●
Availability:
–
For 2nd generation R&S
ZNB20 and for 1st generation R&S
ZNB40 that are
equipped with the new reflectometer board, order no. 1317.8015.03, bias tees
are
not
available.
(See
ZNB40 reflector module with ESD limiters"
–
For R&S
ZNB4|8, bias tees are provided as an option (see below).
–
For all other R&S
ZNB models, they always equipped.
●
There is no additional HW or SW switch for the bias tees. The voltage is applied to
the RF port when you connect the voltage source to the corresponding PORT BIAS
connector.
Optional extensions and accessories
