HP 5340A - Page 243

Model 5340A
Schematic Diagrams
U23( 11 )
BINARY
WEIGHT
= 1
Part of Figure 8 - 27. A20 Time Base Assembly
EQUl VALENT
INPUT
fi A2OU23(6) .2 V/cm dc. .2 rrsldiv
fi A2OUq2) .2 V/cm dc, .2 pe/div
@ mU2(4) .2 V/cm, .2 ps/div
fi A2OU2(5) .2 V/cm. .2 &div
Waveforms taken with 101 oscilloscope probe. Counter controls set to CHECK, 1 Hz
RESOLUTION, SAMPLE RATE - fully ccw.
RESOLUTION
SWITCH
SETTING
1
10
100
1K
10K
1 OOK
1M
A20 Truth Table
U23( 13)
BINARY
WEIGHT
= 4
U23(12)
BINARY
WEIGHT
- 2
H
H
4+2+1=7
4+2=6
4+1=5
4
2+1=3
2
1
SELECTED
SIGNAL
l7 1 Hz I pin 9
I 10 Hz pin 7
6
l5 100 Hz pin 6
l4 1 kHz pin 5
I 10 kHz pin 4
3
l2 100 kHz pin 3
Il 1 MHz pin 2
8 - 51