Document type:
Title:
Revision date:
Re vision:
User's Manual (MUT)
N1145 Quad Scaler and Preset Counter/Timer
05/11/2003
0
NPO:
Filename:
Number of pages:
Page:
00115/01:N1145.MUTx/00
N1145_REV0.doc
14
6
2. Technical specifications
2.1. Packaging
The Model N1145 is housed in a double width NIM module.
2.1. Power requirements
+
6 V @ 700 mA;
−
6 V @ 900 mA
2.2. Front panel I/O connections
SECTIONS 1 AND 3
INPUTS
1, accepts both NIM and TTL signals, 50
Ω
impedance.
GATE
2, NIM/TTL bridged input ports, high impedance,
internally connected. Free port must be terminated on
50
Ω
SECTIONS 2 AND 4
INPUTS
1, accepts both NIM and TTL signals, 50
Ω
impedance.
GATE
one NIM/TTL input, 50
Ω
impedance.
CARRY
one NIM output. Generates a pulse when counter has
fully cycled (transition 99,999,999 to 0).
SECTIONS 1, 2, 3 and 4
RESET
one NIM/TTL input, 50
Ω
impedance, clears
sections
1 to 4
. Same effect is obtained, for each section, with the
individual RESET pushbuttons.
SECTION 5
INPUTS
1, accepts both NIM and TTL signals, 50
Ω
impedance.
LOAD
one NIM/TTL input, 50
Ω
impedance. Loads counter with
value preset on the thumb wheel switch digits (same
effect with LOAD pushbutton).
OUT
2, NIM outputs, these are true(
∗
)as long as counter
contents are different from zero.
(
∗
) NIM level 1=-800 mV=TRUE