- Hewlett-Packard Broadband Service Analyzer User's Guide

Standards and Specifications
External Connectors
5-8
Sync In Connector (DE9P)
Parameter Nominal Minimum Maximum Notes
Reference frequency
1 MHz −25 Hz +25 Hz
Input duty cycle
45% 55%
Input voltage (Logic-O)
0 V 1.5 V
Input voltage (Logic-1)
3.5 V 5 V
Input current (Logic-O)
2 mA Vin<0.5 V
Pin Number Signal Type Function
1 CMOS input Reserved
2 RS232 Output Reserved
3 RS232 Input Reserved
4 CMOS input 1 MHz clock input
5 CMOS input Reserved
6 Ground Ground
7 Ground Ground
8 Ground Ground
9 Ground Ground
9
8
7
6
5
4
3
2
1