HS Osc Probing

Oscilloscope Probing

Challenge

How do you know that the high speed scope is displaying the real signal with accurate edge rate or ringing? Engineers should consider several important factors, such as scope bandwidth, cable and probe bandwidth.

High Speed Scope Probing Tips

  1. Use strong and stable vertical PCB holder with one microscope on each sides.
  2. The microscope mounting must be independent of the probing station so that the movement of the microscope arms will not shake the probe station.
  3. Using two microscopes is necessary because the contacts on both sides must be verified constantly to ensure the adequate probing pressure.
  4. A durable probe is desirable because the PCB movement might damage the first probe already landing on the test pads while the second probe on the other side touches the PCB.
  5. Probe tip pressure might be larger than horizontal probing because of visual difficulties.
  6. GHz durable probes are available on our web site.

Helpful Links

  1. www.packetmicro.com
  2. www.highspeeddc.com

Good Practices

  1. Try to avoid vertical probing by taking measurement on the same side of the PCB. Use de-embedding to remove the unwanted fixture trace or connector.
  2. Build a symmetric structure on your DUT, so that you can probe on the same side of the PCB.
  3. For vertical probing, setup the probe vertically with flexible probe holders.
  4. Use durable, rigid microprobe with different pitches

 

High Speed Oscilloscope Probing Demonstrations

Oscilloscope Probing Demonstration

RF probing with FP160 and Spectrum Analyzer

 Oscilloscope Probing Demonstration 

PCB probing with high-speed oscilloscope

About PacketMicro

PacketMicro, based in Silicon Valley, provides a wide range of gigahertz probes, probe positioners, bench-top probe stations, and digital microscopes. In addition, PacketMicro offers wireless modules and engineering services in Bluetooth Smart, ZigBee, and wireless sensor networks. PacketMicro customers include many Fortune 100 companies.

Get in touch

PacketMicro, Inc.
1900 Wyatt Drive, Suite 9
Santa Clara, CA 95054
USA

+1 408 675 3900 (Main)

+1 408 580 0059

info@packetmicro.com