Getting Started
R&S
®
ZNA
14
User Manual 1178.6462.02 ─ 12
2. If necessary, press the standby toggle key on the front panel to switch the instru-
ment to ready state.
The instrument automatically performs a system check, boots the Windows
®
oper-
ating system and then starts the vector network analyzer (VNA) application. If it
was terminated regularly, the VNA application restores all recall sets and instru-
ment settings of the previous analyzer session.
To shut down the analyzer, proceed as follows:
1. Press the standby key.
Pressing the standby key causes the instrument to save all loaded recall sets, to
close the VNA application, to shut down Windows
®
, and to go to standby state. Of
course, you can also perform these steps manually, like in any Windows session.
2. If desired, set the AC power switch to position
O
(Off).
Risk of data loss
It is recommended to switch the analyzer to standby state before disconnecting it from
the AC supply. If you set the power switch to 0 while the VNA application is still run-
ning, you lose the current settings. Moreover, loss of program data cannot be excluded
if the application is terminated improperly.
The AC power switch can be permanently on. It is recommendable, however, to switch
it off if the instrument is not used for some time. When you switch the instrument back
on, be sure to comply with the extended warm-up phase specified in the data sheet.
To guarantee the specified functionality, after turning off the R&S
ZNA, you have to wait
for at least 10 seconds before turning it on again. This rule applies to both the AC
power off and the standby state.
4.1.8
Standby and Ready State
The standby toggle key is located in the bottom left corner of the front panel.
The standby power only supplies the power switch circuits and the optional high preci-
sion quartz (R&S
ZNA-B4, "Precision Oven Quartz Frequency Reference"). In this
state, it is safe to switch the AC power off and disconnect the instrument from the
power supply. In ready state, all modules are power-supplied. When switched to ready
state, the analyzer initiates its startup procedure.
Observe the instructions for startup and shutdown in
Chapter 4.1.7, "Starting the Ana-
Putting the Analyzer into Operation
