Putting the Analyzer into Operation
R&S
®
ZNB/ZNBT
15Getting Started 1316.0062.02 ─ 26
To start the analyzer, proceed as follows:
1. Switch the AC power switch to position I (On).
After power-on, the analyzer automatically goes to standby or ready state, depend-
ing on the state of the standby toggle key at the front panel when the instrument
was switched off last time.
2. If necessary, press the standby toggle key on the front panel to switch the instru-
ment to ready state (R&S ZNB: green LED goes on; R&S ZNBT PWR LED turns
from amber to green).
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 strongly recommended to switch the analyzer to standby state before disconnect-
ing it from the AC supply. If you set the power switch to 0 while the VNA application is
still running, 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.
2.8 Standby and Ready State
R&S ZNB: The standby toggle key is located in the bottom left corner of the front
panel. In standby state, the right, amber LED is on, in ready state, the left, green LED
is on.
R&S ZNBT: The standby toggle key is located in the bottom right corner of the front
panel. In standby state, the PWR LED light is amber, in ready state it is green.
The standby power only supplies the power switch circuits and the optional oven
quartz (option R&S ZNB-B4/R&S ZNBT-B4, "OCXO Frequency Reference"). In this
Standby and Ready State
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