CHAPTER 3 NDA-24296
Page 178
Revision 1.0
PA-CK14
Oscillator
PA-CK14
Oscillator
1. General Function
The PLO block of the TSW card generates its base clock signals, and adjusts their phase with the source
clock signals so the PLO can send the synchronized clock signals to the TSW. When the 1 IMG system is
a clock-subordinate-office of the digital network, the base clock accuracy of the PLO/ PH-SW10 (±5 ppm
deviation) is sufficient. However, the more high-precision base clock signals are required at the clock-
source-office, as this circuit card provides --- PA-CK14 (±0.3 ppm deviation). When this circuit card is
mounted, the 1 IMG system selects the PA-CK14 (OSC) clocks as the base clock of the PLO.
Figure 3-3 Location of PA-CK14 (OSC) Card in the System
SEL
SEL
TDSW
MUX0
PLO
SEL
SEL
TDSW
MUX0
PLO
BWBBWB
BWB BWB
OSCOSC
DTI 0 CLOCK SOURCE
DTI 1 CLOCK SOURCE
DTI 2 CLOCK SOURCE
DTI 3 CLOCK SOURCE
DSC 0
DSC 1
FRONT CABLES FRONT CABLES
MUX1 MUX2 MUX3 MUX1 MUX2 MUX3
LC/TRKLC/TRKLC/TRKLC/TRKLC/TRKLC/TRKLC/TRKLC/TRK
DSC1
DSC0