Struck Documentation
SIS3153
VME interface
Page 24 of 38
Four pairs of green surface mounted LEDs are used to indicate the logic level of the front
panel LEMO inputs and outputs.
Lit LED
Description
NIM
In/output set to NIM level
logic state
voltage
0
0 V
1
< -0.8 V
TTL
In/output set to TTL level
logic state
voltage
0
< 0.7 V
1
> 2.4 V
Note 1:
the factory default power up logic level is NIM: The input default levels can be set on
JP123, the default output levels on JP133. In addition the logic level can be set in the LEMO
IO control register
Note 2:
the inputs are factory terminated with 50 Ω, the outputs drive a load of 50 Ω
