T0 trigger input board (module3), 11.12.2008

T0 DIM server was used to control the signal sent to CTP L0 inputs. All the inputs signals (toggling, signature, random, normal) were measured with snapshot memory, and gave results as expected.

Signal 0T0A: we tried with P and N polarity, with exchanged cables 0T0A 0TCE on T0 side. The cable connected to switch input 41 is not correct.
- with toggling it is always ON,
- with signaure, the measured activity is ~37000
(expected ~10000),
- with random signal, the activity was 5000 (expected 500),
- with normal signal, we see some spurious signals (expected 0)

Than we arranged toggling on all cables
and exchanged the cables just after CTP patch panel, i.e.:

Patch_panel_connector -> cableID -> Switch signal_seen_in_L0_SSM
1.
Bottom/B/17 -> Cable16 -> Switch alwaysON
Bottom/B/20 -> Cable13 -> Switch Toggling
2.
Bottom/B/17 -> Cable13 -> Switch Toggling
Bottom/B/20 -> Cable16 -> Switch alwaysON

Conclusion: The patch cable 16 connected between
Rack25/Patch panel/bottom/B/17 and CTPSwitch Rx-41 input is damaged.