Keysight M8195A - Ref CLK in LED

1 Introduction
24 Keysight M8195A Revision 2 – Arbitrary Waveform Generator User’s Guide
1.4.4 Ref CLK IN LED
Table 6: Ref CLK IN LED
Color
Meaning
Description
Off
Applied Clock cannot be used
In case the clock reference is not set to Ref CLK IN, this LED is OFF.
ON, green
Valid signal at Ref CLK IN detected
 CDR has locked on Ref CLK In and
 The externally applied frequency is correct and
 Ref CLK In has been selected as the clock reference
ON, red
No valid signal at Ref CLK IN
 Ref CLK In has been selected as the clock reference
 The externally applied clock signal is not valid. E.g. the
frequency does not match the adjusted value or the
amplitude is outside the specified range