Rohde & Schwarz SR8000 Series, System Manual

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Chapter 2 Design and Function
5300.9677.72 - 2.19 - EN-4
1.3.3 Displays: Separate Amplifier
Fig. 20 LEDs on the R&S VU813
Key Meaning / function
LOCAL Toggle between local and remote operation. The LED (yellow) indicates
local operating status and means the instrument cannot now be oper-
ated via the interfaces.
RESET Reset general fault after problem corrected; the Fault LED goes off
ON Switch transmission operation on (LED shows green)
OFF Switch off transmission operation (LED shows yellow); no power from
transmitter
Display Meaning
RF RF present at transmitter output (green LED);
LED goes off if power drops below configured threshold
SUPPLY CCU Transmitter control unit power supply OK (green LED);
LED goes off if power supply fails
WARNING General warning from transmitter (yellow LED)
FAULT General transmitter fault (red LED)
FAULT CCU Fault on transmitter control unit (red LED)
Display Meaning
AMPLIFIER ON Command "Amplifier ON" present (LED shows green)