STST (Shut a Tower)*

STST Crate , TEC , Tower Number

STST(Shut Test Memories) is used to turn off the threshold bits and electron bit sent by a tower in the TEC. A tower consists of an EMC and HAC pair. The Energies for the EMC and HAC sections are still sent to the adder card. Only the threshold bits are zeroed. This command may be useful in shutting of noise that starts between the Linearization memories and the Test Memories.

Crate :

Crate number in the range 0 to 15. -1 selects all crates.

TEC :

Trigger Encoder Card number 0 to 13. -1 selects all TECs

Tower Number :

Towers are Numbered 1 to 4. Tower 1 consists of HAC 1 and EMC 1. Tower 2 is for HAC 2 and EMC 2. Tower 3 is for HAC 3 and EMC 3. Tower 4 is for HAC 4 and EMC 4. -1 selects all towers.

EXAMPLES:

1.

STST 2 1 3
will zero tower 3 on TEC 1, in crate 2.

2.

STST 2 1 -1
will zero all 4 towers on TEC 1 in crate 2.

3.

STST 2 -1 3
will zero tower 3 on all TECs in crate 2.

4.

STST -1 1 3
will zero tower 3 on TEC 1 in all crates.

5.

STST -1 -1 -1
will zero all towers on all TECs in every crate.