2.3.3 Timing Input
The timing input LED is mainly used to quickly visualize the status of the external ref-
erence timing source (see "External Reference (GM)" on page73) and the detection of
PPS/10MHz inputs on the front-panel. Blinking behavior in this context refers to blinking
continuously at 1Hz in parallel to the PPS output of the device.
Table 2-5:
Timing Input LED behavior
Visual Behavior Description
● ● ●
Blinking
Green
GM is locked, PPS and CLK signals are detected
● ● ●
Blinking Yel-
low
GM is locked but PPS is not detected (PPS is configured as
not mandatory)
● ● ●
Blinking
Red
The device is locking to its GM source. PPS & CLK on front
panel are detected
● ● ●
Steady Red In a locking process with its GM source. The device lost the
PPS signal or PPS & CLK signal at the same time on front
panel
● ● ●
Blinking Yel-
low
GM preset is active. PPS on front panel is detected.
● ● ●
Idle GM is not active and PPS on front panel is not detected
2.3.4 SFP Ports
The network ports of the device are arranged in a dual stack SFP cage. The following table
represents only the two first ports but can be extrapolated to the other ones. The LEDs of
these SFP ports are slightly different to standard usage as it does not differentiate TX/RX
but utilizes the arrows to indicate the upper/lower port and their corresponding states:
12
CHAPTER 2 • WR-Z16 User Manual Rev. v3.4
2.3 Monitoring LEDs