ATLAS Playground Optical Network¶
This page documents the optical connections of the FELIX cards in the ATLAS playground (currently in H148).
Introduction¶
The Prime712 and BNL712 FELIX cards come in two main configurations: 48 channels and 24 channels. For the optical connection, two (key-up/key-down) MTP couplers are present on each card: for the 48 channel version, there are 24-TX and 24-RX fibers connected to each MTP coupler; for the 24 channel version, the channel number is 12 for each MTP coupler.
The fiber mapping is described in detail in the FLX-712 Hardware Manual as an example, the mapping of the 48 fibers configuration is shown below.
Patch Panels in the ATLAS Playground¶
In our lab, we use a number of patch panels and optical conversion cables in order to be able to connect individual or groups of channels. As of now, we have the capability of splitting three MTP-48 connectors into three groups of 48 individual fibers with LC connectors.
Optical Connections¶
In this page, we try to keep track of the connections realized at any given moment (see detailed documentation below).
Documentation¶
The following documents provide information on the optical network in the ATLAS playground:
- Excel spreadsheet with the table of all connections through the patch panels
- Various quotations (in reversed time order):
- Old Overview 3 Sep 2020
Modifying a fiber patch box:
An MPO48 to 4x MPO12 trunk cable:
3: All TX 0-11
4: All RX 0-11¶
Original:
Bottom row (1-6)
Turquoise: TX0
Pink: TX1
Purple: TX2
Yellow: TX3
Black: TX4
Red: TX5
White: TX6
Gray: TX7
Brown: TX8
Green: TX9
Orange: TX10
Blue: TX11¶
Top row (7-12)
Pink: RX1
Turquoise: RX0
Yellow: RX3
Purple: RX2
Red: RX5
Black: RX4
Gray: RX7
White: RX6
Green: RX9
Brown: RX8
Blue: RX11
Orange: RX10
Correct FELIX configuration:
Top row:
Blue: TX0
Blue: RX0
Green: TX2
Green: RX2
Gray: TX4
Gray: RX4
Red: TX6
Red: RX6
Yellow: TX8
Yellow: RX8
Pink: TX10
Pink: RX10¶
Bottom row:
Orange: RX1
Orange: TX1
Brown: RX3
Brown: TX3
White: RX5
White: TX5
Black: RX7
Black: TX7
Purple: RX9
Purple: TX9
Torquise: RX11
Torqoise: TX11
