Wave Forming - HP 8112A Operating, Programming And Servicing Manual

10.4-2 Servicing the Shaper and Output Amplifier
Figure 10.4-l. Shaper IC Block Diagram
Table 10.4-l. Shaper IC Output Modes
Inputs
LO LO
LO HI
HI LO
HI
The main inputs are differential current inputs INP or INP. The
single-ended EECL voltage input (0 V to -0.6 V) generates an output
pulse with fast, but fixed, transition times.

Wave Forming

In Linear transition mode, the waveform block within the shaper IC
acts as a linear amplifier upon the input from the slope generator
(See Chapter 10.3).
In shaped (Gaussian) mode, the linear slopes of the input pulses are
given gaussian characteristics controlled by the inputs on pins 1 and
24 of the shaper IC.
For fixed transitions, the single ended EECL input is used to provide
fast, fixed mode output pulses having a fixed transition of 4.5 ns.
Input
Selected
Differential
Differential
Not used
HI EECL (0 V, -0.6 V)
output
Signal
Linear
Shaped
Fast Pulse