Difference between revisions of "Subrack"
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* 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 | * 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 | ||
| + | |||
| + | == Dimensions and Weight == | ||
| + | * A fully populated 3-MDM MCE weighs 9.5 kg | ||
| + | * Dimensions for a 48-HP MCE: ~ 40cm x 31cm x 34cm (L x W x H) | ||
== Other information == | == Other information == | ||
Revision as of 12:53, 15 November 2012
Template:Hierarchy header 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.
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.
Components
A fully-kitted subrack contains:
- 1 clock card
- 2 (48-HP subrack) or 4 (72-HP subrack) readout cards (fewer are installed if the extra read-out capacity is not needed)
- 3 bias cards (in some situations one might be removed)
- 1 address card
It also contains the following which are generally not "user-replaceable":
- 1 bus backplane
- 1 instrument backplane
- 3 (48-HP subrack) or 5 (72-HP subrack) MDM filter boxes
- 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) which is now obsolete and no longer installed. See MCE Power Requirements for current subrack power options
Dimensions and Weight
- A fully populated 3-MDM MCE weighs 9.5 kg
- Dimensions for a 48-HP MCE: ~ 40cm x 31cm x 34cm (L x W x H)
Other information
- MCE Power Requirements
- Hardware Interface (PDF) (SC2_ELE_S580_005)
- Subrack Mounting Instructions (DOC) (SC2-MEC-S580-504)
- Hardware Maintenance notes
