Adjusting The 13 Mhz Clock - Nokia MetroSite Maintenance Manual

4

Adjusting the 13 MHz clock

The 13 MHz clock is adjusted using the Nokia BTS Manager PC and a frequency
counter.
The 13 MHz clock should only need adjusting after a new installation or when the
interface unit (VIFA) is replaced.
Note
Before commencing the adjustment procedure, switch ON the frequency counter
and allow for a stabilising time of about 15 minutes, or as recommended by the
instrument's manufacturer.
Use only a high stability frequency counter for this procedure.
Adjusting the 13 MHz clock
1.
2.
3.
DN9913495 © Nokia Corporation
Issue 3-0 en Nokia Proprietary and Confidential
All manuals and user guides at all-guides.com
Remove the rubber dust shield from the side of the interface unit.
Connect the frequency counter to the X7 connector on the interface unit
(first socket from the front). See Figure 2.
Connect the Nokia BTS Manager laptop PC to the LMP port of the
interface unit. See Figure 2.
Draft
Adjusting the 13 MHz clock
19 (52)