Performing Clock-Slip Measurements - Fluke 635 User Manual

3-10. Performing Clock-Slip Measurements

Customer Premises
RX
In order to ensure proper network performance, clocks between various circuit
elements must be synchronized. Clock-synchronization problems are a
common occurrence when customer-premises equipment, such as PABXs and
multiplexers, are connected to the public network. The QuickBERT-T1 and
QuickCHECK-T1 have the ability to determine synchronization by measuring
the clock-slip count between two clock sources. To perform a clock-slip
measurement, proceed with the following steps.
1. Determine the test measurement points. Clock differential may be made
between any two T1 clocking sources. In this example, thenetwork clock
Performing Clock-Slip Measurements
Bantam-to-Bantam Cables
TX REF OFF
Top Panel of the QuickBERT-T1
Figure 3-5. Clock-Slip Measurements
CSU
EQ SM
MON
OUT
IN
ON 9VDC RED-CHARGING
GREEN-CHARGED
Operation
3
Central Office
abn21f.eps
3-11