CHAPTER 3 NDA-24296
Page 220
Revision 1.0
PH-CK17-A
Phase Lock Oscillato r

PH-CK17-A

Phase Lock Oscillator
1. General Function

This circ uit car d used with a dir ect dig ital inter face circuit card, sets up network synchronization between

networks. Since this circuit card provides a high precision base clock oscillator, the system containing this

circuit card can be a clock source office of the digital network. As seen in Figure 3-25, the PLO can be

redundant regardless of the system switching network selection.

Figure 3-25 Location of PH-CK17-A in 4-IMG System
OSC 64K+8K
(BWB)
(BWB)
CLK, FH, WFH
ACT, ALM
34PH EXCLK CA-A
PLO #0
TSW 00
BWB BWB
DTI0 DCS0
(MDF)
DCS1123
PLO #1

SEL

PLL

Drv

SEL

PLL

Drv

OSC
34PH EXCLK CA-A
TSW 01 TSW 02 TSW 03 TSW 00 TSW 01 TSW 02 TSW 03