- Hewlett-Packard Broadband Service Analyzer User's Guide

Standards and Specifications
Timing and Frequency References
5-10
Timing and Frequency References
Parameter Nominal Minimum Maximum Notes
Internal reference
frequency
19.44 MHz −4.6 ppm +4.6 ppm stratum 3 source
External reference
frequency
1 MHz −25 Hz +25 Hz
Recovered clock
frequency
f
o
−25 Hz +25 Hz f
o
= port 1 or 2 interface
pod rate
BITS—T1 reference
1.544 MHz −25 ppm +25 ppm applied to BITS input
connector
BITS—8/64 kHz
composite clock
reference
64 kHz −25 ppm +25 ppm applied to BITS input
connector
E1 reference
2.048 MHz −25 ppm +25 ppm applied to BITS input
connector