NEC Neax 2400 Imx Circuit Card Manual

CHAPTER 3 ND-70182 (E)
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PH-CK17-A
Phase Lock Oscillator
4. Lamp Indications
Lamp indications for this circuit card are shown in the table below:
Note:This lamp is effective when this card is mounted in TSWM0 of the IMX-U system.
LAMP NAME COLOR STATE
OPE Green Remains lit while this circuit card is in active state.
MJ RedLights when the following MJ fault has occurred: 
All of the clock supply routes have failed when the system operates as the clock 
subordinate office
32.768 MHz...

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Phase Lock Oscillator
5. Switch Settings
Standard settings for switches on this circuit card are shown in the table below.
Note 1:When this card is used in the 4-IMG or ISWM of the IMX-U system, specify the clock source (DCS or DTI)
according to the clock network configuration for the office.
Note 2:This standard setting is applicable when this card is mounted in TSWM0 of the IMX-U system.
SWITCH 
NAMESETTINGSTANDARD 
SETTINGMEANING
MBUP Circuit card...

CHAPTER 3 ND-70182 (E)
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PH-CK17-A
Phase Lock Oscillator
Note:
When this card is mounted in TSWM0 of the IMX-U system, DCS clock from the ISW is used. The DTI clock
can also be used as an alternate clock supply route in case of DCS clock failure.
SWITCH 
NAMESWITCH
NO.SETTINGSTANDARD 
SETTINGMEANING
SW02
Note1ON DIU 0 is used as the DTI clock supply route zero.
OFF DIU 0 is not used.
2ON DIU 1 is used as the DTI clock supply route one.
OFF DIU 1 is not used.
3ON DIU 2 is used as the...

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PH-CK17-A
Phase Lock Oscillator
SWITCH 
NAMESWITCH
NO.SETTINGSTANDARD 
SETTINGMEANING
SW111
2
3
4
SW121
2
3
4ON Not used
OFF×Not used
5
MUSIC (CH1) selection. The music varies depending on the melody IC located on this circuit 
card. 6
7
8ON Not used
OFF×Not used
SW11-1 SW11-2Impedance of the External 
Music Source 0 (FM 0)
OFF OFF 600 Ω
ON OFF 8.2 Ω
OFF ON 47K Ω
SW11-3 SW11-4Impedance of the External 
Music Source 1 (FM 1)
OFF OFF 600 Ω
ON OFF 8.2 Ω
OFF ON...

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PH-CK17-A
Phase Lock Oscillator
6. External Interface
PLO input leads appear on the LT connectors labeled EXCLK0 and EXCLK1
PLO mounting slots
The PLO card is mounted in slots 21 and 23 of TSWM.
LT cable connectors
Connect the LT cables to the connectors labeled EXCLK0 and EXCLK1 on the TSWM backplane.
Figure 3-26   PLO Pin Assignments for Receiving Clock (4 IMG System) (1/2) 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23...

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PH-CK17-A
Phase Lock Oscillator
EXCLK0/EXCLK1 connector Pin Assignment
Pins are assigned as follows on the EXCLK0/EXCLK1 connectors. When the clock is distributed from a
digital interface, use one pair of DIUxxx in one of the 4 inputs. (There are a maximum of 4 inputs.) DIU
leads have the following precedence: DIU0xx (high) 
➝ DIU3xx (low).
Figure 3-26   PLO Pin Assignments for Receiving Clock (4 IMG) (2/2)
PLO input leads appear on the LT connectors labeled...

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PH-CK17-A
Phase Lock Oscillator
LT cable connectors
Connect LT cables to the connectors labeled EXCLK0 and EXCLK! on the ISWM backplane.
Figure 3-27   PLO Pin Assignment for Receiving Clock (ISW) (1/2)
EXCLK0/EXCLK1 connector Pin Assignment
Pins are assigned as follows on the EXCLK0/EXCLK1 connectors. When the clock is distributed from a
digital interface, use one pair of DIUxxx in one of the 4 inputs. (There are a maximum of 4 inputs.) DIU
leads have the...

ND-70182 (E) CHAPTER 3
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PH-CK17-A
Phase Lock Oscillator
Cable Connection Diagram
Provide the following wiring at the MDF. The following connection diagram shows an example of a system
that has the PLO cards in dual configuration. Figure 3-28 is a cable connection diagram (ISW) for accepting
synchronization clocks from an external high-stability oscillator.
Figure 3-28   Cable Connection (ISW) for Accepting Synchronization Clocks from an External Oscillator
MDF ISW
External...

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PH-CK17-A
Phase Lock Oscillator
This figure shows an example of distributing clock from a digital interface in LN. This example assumes that
the Digital Trunk POUT leads are used as the first clock distribution route.
Figure 3-29   Cable Connection Diagram (ISW) for Receiving Clock from Digital Interface
MDF
ISWLN
PCM
Carrier
Equipment
DSU
CLK PCM Cable (2P)
to other node
Installation CableInstallation Cable maximum 100
meters (330 feet)...

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PH-CK17-A
Phase Lock Oscillator
Figure 3-30   LT Connector Lead Location of PLO (ISW-LN0)
CLK00
(Slot No.08) CLK10
(Slot No.12)
TSWM1
TSWM0 ISWM
Installation Cable DIU Connection Note
MDF
To Digital Interface 
EXCLK0
(Slot No.21)
PLO CLOCK0
(Slot No.21)
EXCLK1
(Slot No.23)
PLO CLOCK1
(Slot No.23)PLO CLOCK0
(Slot No.21)PLO CLOCK1
(Slot No.23)
ISW-LN PLO CA-A
PLO-CLK CA-A DCS Connection
Note:For DIU connection route diagram, see the figure on the next page.
261...