SIS Documentation
SIS3800
Scaler/Counter
Page 21 of 39
12 Input Configuration
SIS36/38xx boards are available for NIM, TTL and ECL input levels and in LEMO and flat
cable versions. The boards are factory configured for the specified input level and connector
type, input termination is installed.
12.1 ECL
The 100
Ω
input termination can be removed in groups of four channels by removing the
corresponding resistor networks. The termination of single control inputs can be disabled with
jumpers J101 through J108, an open jumper disables the termination of the corresponding
channel.
Network
Channels
1 K Networks
RN10
1-4
RN11/12
RN20
5-8
RN21/22
RN30
9-12
RN31/32
RN40
13-16
RN41/41
RN50
17-20
RN51/52
RN60
21-24
RN61/62
RN70
25-28
RN71/72
RN80
29-32
RN81/82
RN110
Control 1-4
RN111/RN112
RN120
Control 5-8
RN121/RN122
The schematics of the ECL input circuitry is shown below.
-
+
+
-
-5 V
GND
1 K
1 K
100
SIL RN(1)X0
SIL RN(1)X1
SIL RN(1)X2
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