Period Generator - HP 8112A Operating, Programming And Servicing Manual

Period Generator

Slope Generators
Table 10.3-g. UlOl Mode Decoder truth table
CTRL Mode U101/9
Mnemonic
Off
PERC
DELC
WIDC
HILC
Area
The level check output (LCO) on pin U101/16 is LOW in normal
mode and HIGH during self test.
To check operation of the Ext. Input Circuit:
1. Set up the HP 8112A as follows:
Mode
Trig Slope
Trig Level Pot
2. Apply a symetrical signal to the Ext. Input.
3. Check the input signal from the trigger input circuit at pin 7 of
Figure 10.3-8. Period Generator Input pin 7
To check the operation of the Period Generator:
1. Set the HP 8112A to RCL 0
2. Check the ramp signal at pin 20 of U200 against Figure 10.3-g.
L L L L
L
L L L H H
L H H L L
H H H H
L
H
Trig
f
Mid-range
EXT. PER.
1
r