[Gb-ccb] Re: Cabling for CCB

Bob Simon bsimon at nrao.edu
Mon Oct 3 09:29:15 EDT 2005


I've assigned WC and WF cable numbers.  Make a label and put on both 
ends.  Reference designators are also noted.  AC and DC cables aren't 
assigned numbers.
bob..


Richard Lacasse wrote:

> All,
> 
> FYI, JD and I went to the receiver room this afternoon to determine the 
> cable requirements for connecting the CCB.  Here is a summary of what we 
> determined.  Some details still need to be worked out, obviously, but 
> this is a reasonable starting point.  If anyone sees any problems with 
> what we've listed below, please let us know ASAP.
> 
> Thanks,
> Rich and JD
> 
> -------------------------------------------------
> Cable     Required     Cable              Note
>           length (ft)  Connectors
> -------------------------------------------------
> AC           8         16 - 18 AWG          1
>                        Spade lugs
> 
> DC           15        Multi-conductor      2
>                        MIL multi-pin
> 
> 1 PPS        70        RG223                3
>                        BNC male
CCB backend to fiber rack 1PPS
RNE3-6N7A- to RNE3-5A4-
WC575
> 
> 10 MHz       15        RG223                4
>                        BNC male
CCB backend to LO rack 10Mhz distributor
RNE3-6N7A- to RNE3-1A9-
WC576
> 
> Rcvr ctrl     ?        4 Shielded tw pr     5
>                        CCB end DB15 male
>                        Rcvr end ?
> 
> Console/JTAG 70        2 Shielded tw pr     6
>                        CCB end: DB25 female
>                        Rst box end: 2 x DB9
CCB backend to fiber rack reset box
RNE3-6N7A- to RNE3-5A3-
WC577
> 
> LAN rx rm    70        fiber zip cord       7
>                        ST at both ends
CCB backend to mm junction box
RNE3-6N7A- to RNE3-9A2-
WF46
> 
> LAN servo rm 15        fiber zip cord       8
>                        SC at one end
>                        ST at the other
> 
> Notes:
> 
> 1 - From box attached to ceiling of receiver room to power supply plate. 
> Box was designed by Bob Simon.
> 
> 2 - From power supply plate to CCB front panel.
>     Determine required minimum wire gauge from nominal voltage drop
>     at normal operating currents.  Need connector part #
> 
> 3 - From "back room" 1 PPS distribution chassis to cable
>     trays, to turret, to CCB.
> 
> 4 - From 10 MHz distributor on turret to CCB
> 
> 5 - Need additional info for receiver end.
>     4 twisted pairs with and overall shield should be adequate.
> 
> 6 - Need two individually shielded twisted pairs for reset signals.
>     Other signals will be on a short pigtail coming out of the same
>     backshell.  Cable goes to Reset Box in the back room.
> 
> 7 - From back room to cable trays to turret to CCB
> 
> 8 - Need to use two unused fibers between the servo room and rx rm
>     because none of the fibers in the rx rm presently carry 100 Mbit
>     ethernet.
>     Presently, the following are unused:
>     Rx Rm           Servo Rm
>     BLK tube        BLK tube
>       BLK
>       RED
>       ORG             ORG
>       BLU             BLU
>       VIO             VIO
>     YEL tube        YEL tube
>       RED             RED
>       WHI             WHI
>     Red tube        Red tube
>       RED             RED
>       BLK             BLK
> 





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