Difference between revisions of "Subrack"

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{{Hierarchy header}}
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{{Related|Subrack}}
 
Two types of MCE subracks are in production:
 
Two types of MCE subracks are in production:
 
* a large (72-HP) subrack containing 5 MDM connectors and four read-out cards.
 
* a large (72-HP) subrack containing 5 MDM connectors and four read-out cards.
 
* a small (48-HP) subrack containing 3 MDM connectors and two read-out cards.
 
* a small (48-HP) subrack containing 3 MDM connectors and two read-out cards.
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''Work in Progress'': [[DoubleMCE]] is a custom two-MCE72-in-one crate being developed to satisfy the space constraints for the upcoming BICEP array.
  
 
An intermediate sized 60-HP subrack was also prototyped but not produced in large numbers.  Functionally it is equivalent to the modern 48-HP subrack.
 
An intermediate sized 60-HP subrack was also prototyped but not produced in large numbers.  Functionally it is equivalent to the modern 48-HP subrack.
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[http://en.wikipedia.org/wiki/Horizontal_pitch (what is HP?)]
  
 
== Components ==
 
== Components ==
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;Notes:
 
;Notes:
 
* before the development of fast bias cards, in each subrack, one bias card was often replaced with a biasing [[address card]] ([[BAC]]), to allow for fast SQ2 switching.  Modern bias cards can now perform fast switching and the BAC option is now obsolete.
 
* before the development of fast bias cards, in each subrack, one bias card was often replaced with a biasing [[address card]] ([[BAC]]), to allow for fast SQ2 switching.  Modern bias cards can now perform fast switching and the BAC option is now obsolete.
* the 72-HP subrack also has space for a power supply (PSA) which is now obsolete and no longer installed.  See [[MCE Power Requirements]] for current subrack power options
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* the 72-HP subrack also has space for a [[PSA|power supply]] (PSA) or a [[Linear Feed Card]] which are both obsolete and no longer installed.  The [[Linear Feed Card]] would simply bring the power lines off the back plane out to front panel connectors.  See [[MCE Power Requirements]] for current subrack power options.
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== Dimensions and Weight ==
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* A fully populated 3-MDM (5-MDM) MCE weighs approximately 9.5 kg (13 kg). This does not include the weight of the power supply and power cable.
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* Dimensions for a 48-HP MCE: ~ 40cm x 31cm x 34cm (depth x width x height)
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* Dimensions for a 72-HP MCE: ~ 40cm x 43cm x 34cm (depth x width x height)
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** [http://www.phas.ubc.ca/~mce/mcedocs/overview/MEC-C580-111_48HP_Subrack_Mounting.pdf MCE 48-HP Mounting Dimensions (PDF)]
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** [http://www.phas.ubc.ca/~mce/mcedocs/overview/MEC-C580-154_48HP_Subrack_Dimensions MCE 48-HP Dimenstions (PDF)]
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** [http://www.phas.ubc.ca/~mce/mcedocs/overview/MEC-C580-197_72HP_Subrack_Mounting.pdf MCE 72-HP Mounting Dimensions (PDF)]
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*Note: We are currently working on '''reducing the depth''' of the subracks by ~5cm and this will reduce the weight as well.
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** [http://www.phas.ubc.ca/~mce/mcedocs/mechanical/MCE002537_ShallowSubrack(2013-8-29).zip Solidworks model for '''shallow''' MCE72 subracks (zip)]
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[http://en.wikipedia.org/wiki/Horizontal_pitch (what is HP?)]
  
 
== Other information ==
 
== Other information ==
 
* [[MCE Power Requirements]]
 
* [[MCE Power Requirements]]
* [http://www.phas.ubc.ca/~mce/mcedocs/overview/SC2_ELE_S580_005_Rev4.0_mce_interfaces.pdf Hardware Interface (PDF)] (SC2_ELE_S580_005)
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* [http://www.phas.ubc.ca/~mce/mcedocs/overview/SC2_ELE_S580_005_Rev4.0_mce_interfaces.pdf Hardware Interface Block Diagram(PDF)] (SC2_ELE_S580_005)
 
* [http://www.phas.ubc.ca/%7Emce/mcedocs/hardware/SC2_MEC-S580-504%20Subrack%20Mounting.doc Subrack Mounting Instructions (DOC)] (SC2-MEC-S580-504)
 
* [http://www.phas.ubc.ca/%7Emce/mcedocs/hardware/SC2_MEC-S580-504%20Subrack%20Mounting.doc Subrack Mounting Instructions (DOC)] (SC2-MEC-S580-504)
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*[[Connector Mating System Maintenance]] Includes photos and description.
 
* [[MCE Maintenance|Hardware Maintenance notes]]
 
* [[MCE Maintenance|Hardware Maintenance notes]]
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* [[MCE Cooling for balloon-based experiments]]
  
[[Category:Hardware]]
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[[Category:Subrack| ]]

Latest revision as of 20:37, 18 November 2020

Two types of MCE subracks are in production:

  • a large (72-HP) subrack containing 5 MDM connectors and four read-out cards.
  • a small (48-HP) subrack containing 3 MDM connectors and two read-out cards.

Work in Progress: DoubleMCE is a custom two-MCE72-in-one crate being developed to satisfy the space constraints for the upcoming BICEP array.

An intermediate sized 60-HP subrack was also prototyped but not produced in large numbers. Functionally it is equivalent to the modern 48-HP subrack.


(what is HP?)

Components

A fully-kitted subrack contains:

It also contains the following which are generally not "user-replaceable":

Notes
  • before the development of fast bias cards, in each subrack, one bias card was often replaced with a biasing address card (BAC), to allow for fast SQ2 switching. Modern bias cards can now perform fast switching and the BAC option is now obsolete.
  • the 72-HP subrack also has space for a power supply (PSA) or a Linear Feed Card which are both obsolete and no longer installed. The Linear Feed Card would simply bring the power lines off the back plane out to front panel connectors. See MCE Power Requirements for current subrack power options.

Dimensions and Weight

  • A fully populated 3-MDM (5-MDM) MCE weighs approximately 9.5 kg (13 kg). This does not include the weight of the power supply and power cable.
  • Dimensions for a 48-HP MCE: ~ 40cm x 31cm x 34cm (depth x width x height)
  • Dimensions for a 72-HP MCE: ~ 40cm x 43cm x 34cm (depth x width x height)

(what is HP?)

Other information