Instrument tour
R&S
®
ZNA
28Getting Started 1178.6456.02 ─ 18
4.1.2 Status LEDs
Multi-color LEDs, indicating various HW and FW states:
●
Ext. Ref.
Indicates whether an external reference clock is used.
– Off: the internal reference clock is used
– Green: the R&S ZNA is synchronized to an external reference clock
– Yellow, flashing: the R&S ZNA is configured for external synchronization, but
cannot lock on the external reference clock.
●
Cal.
Indicates the calibration state of the active setup.
– Off: none of the traces (in the active setup) has a valid calibration
– Yellow: some of the traces have a valid calibration
– Green: all the traces have a valid calibration
●
RF Interlock
RF interlock mode is activated by “RF Off Control” BNC connector on the rear
panel of the R&S ZNA (see Chapter 4.2, "Rear panel", on page 31. In this mode,
RF sources are forced off.
– If the connector is terminated (electrical short), the RF interlock mode is inac-
tive and the LED is off (see picture below)
– If the connector is open, the RF interlock state is active and the LED is on
(red).
Figure 4-2: RF Off Control, terminated with attached Short
●
Remote
Indicates whether a remote control (RC) connection is established.
– Off: no RC connection established
– Green: RC connection established
●
User Defined
Persistent, user-defined state indicator. Can be set to off, green, green flashing,
red, or red flashing
4.1.3 Standby key
Front panel
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