Revision as of 23:08, 4 January 2016

Electronics

Cold electronics input to DAQ (LArTPC)

16 ch input to analog ASIC (FE + ADC), 8:1 digital MUX, 2 channel digital output
8 ASIC / analog mother board
8 analog mother boards / FEMB assembly
128 analog channels / FEMB assembly
1 digital ASIC, 16 channel input, 4:1 MUX, 4 channel output (each 1Gbps)
2Mhz at 12 bits is 24 Mbps
16ch*24Mbps*8MUX = 3072Mbps into digital ASIC, (up to 4Gbps out on 4 links)
20 FEMB assembly / APA
150 APA / 10kt
128:4 total channel MUX

1 DAQ Rack holding/servicing

2 APA can make 6144 Mbps

There are 75 racks per 10kt.

How many switches per rack? Giles draws 1 each for RCE and SSP.
Related: how many NICs per BRC?
What is the speed of the switch connecting the 75 BRCs and the 10 trigger farm and 2 data farm boxes (Giles figure)?
What is the unit of "farm".

@@ Line 22: / Line 22: @@
 * 2 APA
 * 2 COB (16 RCE)
-* 1 BRC (Board reader computer) 3 NICs (RCE network, SSP network, detector network)
+* 1 BRC (Board reader computer)
 * 2 internal switches (one for RCE, one for SSP) 10Gbps?
 APA can make 6144 Mbps
+There are 75 racks per 10kt.
+== Questions ==
+* How many switches per rack?  Giles draws 1 each for RCE and SSP.
+* Related: how many NICs per BRC?
+* What is the speed of the switch connecting the 75 BRCs and the 10 trigger farm and 2 data farm boxes (Giles figure)?
+* What is the unit of "farm".
 = Refs =