Zero Crossing Detector Guide - Wavetek 193 Instruction Manual

6-13
06
COLLECTOR _ O.OV
(SYNC OUT OPEN CIRCUIT)
Figure 6·14. Sync Waveforms
_ -1.SV
___ -1.BV
___ -O.SV
___ -1.SV
_ -O.SV
_ -O.BV
ALL FUNCTIONS
_ -1.BV
- -O.SV
___ -O.SV
FUNCTION: SQUARE
___ -1.SV
_-1.BV
- -O.BV
FUNCTION: SINE OR TRIANGLE
U6 PIN 15
U6 PIN 9
U6 PIN 13
U6 PIN 13
U6 PIN 7
U6 PIN 13
U6 PIN 10
Q13 EMITTER
___ -2.0V
(In TRIG mode, no input, voltage is -1.2 Vdc.)
Figure 6·13. Zero Crossing Detector Waveforms
_ -1.SV
-1.SV
_ -O.BV
-O.BV
U10 PIN 12
U10 PIN 14
U10 PIN 15
U10 PIN 13
2.0
1K
Off
CaNT
FREO/START FREO
FREO MULT
SYM
MODE
Settings
Controls
Set the controls as shown; then take waveform
measurements. Refer to figure 6-13.
6.4.7 Zero Crossing Detector Guide
Figure 6·12. Triangle Buffer Waveforms
(a) Requires a X10 Probe (high impedance)
_ +0.2V
_ -+2.2V
U9 PIN 6
Q12 COLLECTOR,
Q13 BASE
U9 PINS 2 AND 3
Q11 GATE,
013 EMITTER (a)
Q11 SOURCE (a)
+5.0 ± .5
Vdc 01 3
collector
0.3 ± .03
Vp-p triangle,
offset - 9.3
±
.9 Vdc
012 base
0.3 ± .03
Vp-p triangle,
offset
-10 ± 1
Vdc
012 emitter
+
6.5
±
.65 Vdc 011 drain
Desired Results
Table 6·9. Triangle Buffer Checks
Test Point