Getting Started
R&S
®
ZNA
92User Manual 1178.6462.02 ─ 29
Maximum input voltage at FORCE and EMI suppression
The maximum nominal input voltage and current for the FORCE bias input connector
must not exceed the value quoted in the data sheet. Use a double-shielded cable and
terminate open cable ends with 50 Ω to ensure successful control of electromagnetic
radiation during operation.
The LED labeled ON lights when the diplexer is properly power-supplied. If the LED
does not light, check the following:
●
The power connection between the diplexer and the converter must be in place
(see Figure 3-14).
●
The converter must be power-supplied and switched on.
●
The fuse at the converter must be intact.
Fuse panel
The other side panel of the diplexer gives access to the bias fuse. Furthermore, it holds
the type label and visualizes the power supply from the converter (premounted).
Figure 3-18: Fuse panel R&S
ZVA-ZD110 Var 12
A fuse of type IEC 127-F250L protects the diplexer from excess input current at the
Force connector (see Figure 3-17). A fuse of different type protects the frequency con-
verter (see "Fuse holder" on page 87).
For fuse replacement, see Chapter 11, "Maintenance, storage and disposal",
on page 1772.
●
The picture above shows the fuse panel of the "left" diplexer variant (Var 12). For
the "right" variant (Var 18), the horizontal order is exactly opposite.
●
The bias tee functionality is provided by Sense, Force and GND on the connector
panel, see Figure 3-17.
3.5.5 Putting the system into operation
The initial setup of the R&S ZNA67EXT is described in the general R&S ZNA Getting
Started. This section gives additional information related to operation with external test
sets.
Getting started with R&S
ZNA67EXT
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