Getting Started
Follow these steps to get started using a Conv-TTL-Blo board:
- Remove the board from its ESD-protecting bag;
- If you intend to use the board with TTL or INV-TTL pulses, remove
the foliage from the switches. Otherwise, skip this step;
- If TTL pulses are expected on the TTL channels, set the TTL switch (_DOC LIN_K) to its ON position; otherwise, leave it in its OFF position;
- Set the pulse type switch in the appropriate position: ON - Glitch-sensitive, no pulse jitter; OFF - Glitch-insensitive, pulse jitter
- Insert the CONV-TTL-BLO board into the VME crate and power on the crate;
- Check that the PW status LED is lit green and the ERR and I2C status LEDs are lit red. The TTL status LED should also be lit green if you set the TTL switch to the ON position in the previous step.
- Plug in a CONV-TTL-RTM board with a CONV-TTL-RTM-BLO piggyback into the rear part of the VME crate. The ERR LED should now turn off.
- Plug a TTL signal into a front panel input channel, or a blocking signal into the rear panel. When a pulse arrives, the pulse is replicated on the same channel, both on the TTL output on the front panel, and on the three blocking outputs on the rear panel. The pulse LEDs on the front and rear panels for the channel are simultaneously lit green for ~96 ms when a pulse arrives.
- Optional: Connect to the VME crate through telnet to identify the board. An example of identifying a CONV-TTL-BLO in the first slot of the crate cfvm-864-celma1 from a Linux command line:
tstana@tstana-unit:~$ telnet cfvm-864-celma1
Trying 137.138.192.90...
Connected to cfvm-864-celma1.cern.ch.
Escape character is '^]'.
login:user
password:USER
%>readreg 1 1
Read Data: 424C4F32
%>
I.e., register 1 (address 0x0) contains the identification string of the CONV-TTL-BLO. If the board returns the value seen above (the ASCII string BLO2), the identification is complete. Following this command, the I2C status LED on the front planel should also light green**.