28014 Parallax Inc, 28014 Datasheet - Page 97

• Manufacturer Part Number: 28014
• Description: OSCILLOSCOPE USB 200KHZ
• Manufacturer: Parallax Inc
• Type: USBr

Specifications of 28014

• Includes: Probes, Software, USB Cable
• Bandwidth: 200kHz
• Channels: Dual
• Display Type: None - Requires Computer and Monitor
• Probe Type: Hook Probes x1 (3)
• Sampling Rate (per Second): 500ks/s
• Voltage - Input, Max: 20V p-p
• Voltage - Supply: 5 VDC, USB Powered
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Input Impedance: -
• Rise Time (typ): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: Q2119020

Using the External Trigger with 38kHzInfraredwithVaryingFrequency.bs2
' Understanding Signals - 38kHzInfraredwithVaryingFrequency.bs2
' 38 kHz infrared signal with detector feedback
' {$STAMP BS2}
' {$PBASIC 2.5}
DO
LOOP
HIGH 0
FREQOUT 7,3,38500
FREQOUT 7,1,38500
FREQOUT 7,1,38500
FREQOUT 7,2,38500
FREQOUT 7,2,38500
FREQOUT 7,1,38500
FREQOUT 7,1,38500
FREQOUT 7,2,38500
FREQOUT 7,1,38500
LOW 0
PAUSE 20
√
√
√
√
Configure your OPTAscope with the following settings. Note: to set the external
trigger at 10%, press the T button at the top left corner of the Plot Area, click the
right T button to move it back.
Point the IR LED and IR detector towards each other.
Connect the External Trigger TTL probe to P0 using a jumper wire.
Run the program 38kHzInfraredwithVaryingFrequency.bs2.
CH1
CH2
Horizontal Dial
Trigger Source
Trigger Edge
Trigger Mode
Run / Stop Mode
Trigger Voltage
Autoscale
1 V / division
2 V / division
1 ms / division
External at 10%
N/A
Normal
Continuous
N/A
On
Figure 7-8:
OPTAscope
configuration for
capturing infrared
signals