Tektronix 071-0855-05 user manual Clock Trigger, MHz External Clock, GHz Trig OUT, Rx Clock

Operating Basics: Functional Overview

Clock Trigger

The Clock Trigger card provides the reference clock sources for the transmitter and receiver functions of the 10 Gb/s SDH/SONET module.

Figure 2-6 shows the Clock Trigger card front panel.

Module OK

The Module OK LED should be green while the instrument is running. On power up, the LED first lights red, then will switch to green when the system has finished initializing.

The LED will flash YELLOW if the clock’s multiplier can not lock to the selected reference input. This condition occurs when the input clock is not within specified frequency range.

Note: If the LED flashes Yellow, the 10 GHz input clock is missing or out of range. If the LED remains red after the system has finished initializing, call Tektronix for service.

155 MHz EXTERNAL CLOCK IN

The External Clock Input accepts a 155 MHz clock signal which can be used to offset the transmit signal. The input has an SMA connector and 50 Ohms termination.

10 GHz TRIG OUT

The 10 GHz Trigger Output provides a bit-rate signal that may be used for triggering an oscilloscope to capture the 10 Gb/s Output signal. The output has an SMA connector and requires 50 Ohms termination for signal integrity.

Rx CLOCK IN

The Rx Clock Input provides signal interconnection between the module cards. This input must be connected to the Rx Clock Output found on the Receive card of the OTS9100 module using the coax cable provided.

Figure 2-6:

Clock Trigger Front

Panel

OTS9100 User Manual 2-9