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SIS Documentation
SIS3820
VME Scaler
Page 59 of 79
12 Input Configuration
SIS36/38xx boards are available for NIM, TTL , ECL and LVDS 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