Agilent Technologies N8201A - Manual (Page 88)

84 Agilent N8201A Performance Downconverter Synthetic Instrument Module, 3 Hz to 26.5 GHz
4 Front and Rear Panel Features
1588 LED
The IEEE 1588 LED clock status has the following states:
COHERENT CARRIERS
3-7 GHz 1st LO In Provides the 1st LO input signal (3 to 7 GHz) to the downconverters
internal LO distribution circuitry.
3-7 GHz 1st LO Out Provides the 1st LO output signal (3-7 GHz at +15 dBm max) as a
coherent carrier reference for phase locking two receivers.
3.6 GHz 2nd LO In Provides the 2st LO input signal (3.6 GHz) to the downconverters
internal LO distribution circuitry.
3.6 GHz 2nd LO Out Provides the 2nd LO output signal (3.6 GHz at +3 dBm) as a
coherent carrier reference for phase locking two receivers.
State of the Clock Clock Status Illumination
OFF Not synchronized None
ON Synchronized, clock is IEEE 1588 Slave Solid green
ON Synchronized, clock is IEEE 1588 Master Blinking green (once
every second)
ON Synchronized, clock is IEEE 1588 to
Grand Master Blinking green (once
every two seconds
OFF IEEE 1588 is in a fault state Solid red
N O T E
Do not remove the cables connecting the coherent carrier inputs and outputs. These cables
are connected at the factory and must remain so for proper instrument operation.