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Appendix G: Rear-Panel Connectors
G–4
CTS 710 SONET Test Set User Manual
Table G–2: RS-232 Rear Panel Connector Pin Assignment (Cont.)
Pin Number DescriptionName
6 DSR Data Set Ready
7 RTS Request To Send
8 CTS Clear To Send
9 RI Ring Indicator
External Clock Input
You use the external clock input to provide an external reference for
the transmit clock. To set the transmit clock to an external clock:
Press Menu
Button
Select Menu
Page
Highlight
Parameter
Select Choice
TRANSMIT TRANSMIT
SETTINGS
Transmit Clock External BITS
External DSn
H Select External to use an external BITS reference clock for
SONET or DSn signals.
H Select External DSn to use an external clock for DS1/DS3
signals. This selection enables you to input a jittered clock to
provide DSn line jitter.
Calibration Signal Output
You use the calibration signal output for servicing the CTS 710.
Information on servicing the CTS 710 is located in the CTS 710
SONET Test Set & CTS 750 SDH Test Set Service Manual, Tektronix
part number 070-8853-XX.
Appendix G: Rear-Panel Connectors
G–4
CTS 710 SONET Test Set User Manual
Table G–2: RS-232 Rear Panel Connector Pin Assignment (Cont.)
Pin Number DescriptionName
6 DSR Data Set Ready
7 RTS Request To Send
8 CTS Clear To Send
9 RI Ring Indicator
External Clock Input
You use the external clock input to provide an external reference for
the transmit clock. To set the transmit clock to an external clock:
Press Menu
Button
Select Menu
Page
Highlight
Parameter
Select Choice
TRANSMIT TRANSMIT
SETTINGS
Transmit Clock External BITS
External DSn
H Select External to use an external BITS reference clock for
SONET or DSn signals.
H Select External DSn to use an external clock for DS1/DS3
signals. This selection enables you to input a jittered clock to
provide DSn line jitter.
Calibration Signal Output
You use the calibration signal output for servicing the CTS 710.
Information on servicing the CTS 710 is located in the CTS 710
SONET Test Set & CTS 750 SDH Test Set Service Manual, Tektronix
part number 070-8853-XX.