V260 (Scaler, CAEN)

Counter module: 16 TTL counter inputs (50 Ohm), 24 bits each, NIM inhibit input (-0.8V, 50 Ohm). VME A24D16, 256B at 0x100. Rotary switches: 0001 (VME connectors point upwards, marked corner up-right). Changeover switches (24 bit mode): dudududu, four groups, (d - down, u - up, VME connectors pointing rightwards). SW1-3 select the VME interrupt level (net needed).

The V260T power requirements are: 1.8A at 5V.

The counter is operated as follows: The NIM gate signal of a V462 or a DGG is inverted (N454) then fed into the INHIBIT input of the counter (still NIM). The counter inputs are TTL signals.

48 bit operation: channels may be configured to count the carry bit of the preceeding channel. This is done with the changeover switches. In the case of 48 bit per channel, they are configured in the following way: duuuduuu for each of the four groups.

A V260 board is introduced to Online by:

define/dev=counter/mod=v260/base=0x100/vector=0/chan=0 c1 
define/dev=counter/mod=v260/base=0x100/vector=0/chan=1 c2 
define/dev=counter/mod=v260/base=0x100/vector=0/chan=2 c3 
define/dev=counter/mod=v260/base=0x100/vector=0/chan=3 c4 
define/dev=counter/mod=v260/base=0x100/vector=0/chan=4 c5 
define/dev=counter/mod=v260/base=0x100/vector=0/chan=5 c6 
define/dev=counter/mod=v260/base=0x100/vector=0/chan=6 c7 
define/dev=counter/mod=v260/base=0x100/vector=0/chan=7 c8 
define/dev=counter/mod=v260/base=0x100/vector=0/chan=8 c9 
define/dev=counter/mod=v260/base=0x100/vector=0/chan=9 c10 
define/dev=counter/mod=v260/base=0x100/vector=0/chan=10 c11 
define/dev=counter/mod=v260/base=0x100/vector=0/chan=11 c12 
define/dev=counter/mod=v260/base=0x100/vector=0/chan=12 c13 
define/dev=counter/mod=v260/base=0x100/vector=0/chan=13 c14 
define/dev=counter/mod=v260/base=0x100/vector=0/chan=14 c15 
define/dev=counter/mod=v260/base=0x100/vector=0/chan=15 c16

Here is an example for a Tango configuration:

<!--
Properties: 
 Base:             256
 Channel:            0
 FlagSpecialChannel: 0 (1, if the channel contains the carry bits) 
 SimulationMode:     0
--> 
<device>
 <name>exp_v01</name>
 <tags>expert,user</tags>
 <type>counter</type>
 <module>v260</module>
 <device>p09/v260/exp.01</device>
 <control>tango</control>
 <hostname>haso107klx:10000</hostname>
</device>