Passive Probes for Bode 100

Passive probes can be used as interface between the device under test and the inputs of the vector network analyzer when using the input channels in high impedance setting. We strongly recommend using the passive probes shown on this page instead of standard oscilloscope probes. The passive probes shown on this page are specifically designed for the inputs of the Bode 100 VNA, offering best protection for the instrument.

The inputs of the Bode 100 are purely ac-coupled and the 1 MΩ (high-impedance termination) is behind the ac-coupling capacitor. Most standard 10:1 oscilloscope probes only have a 9 MΩ tip resistor and use the 1 MΩ termination of the instrument for the 10:1 division. When connected to the Bode 100, the 1 MΩ is not available as divider resistance for dc-signals since the ac-coupling capacitor blocks the dc-signal. Therefore, the dc-portion of the signal will not be divided by 10 and the full dc voltage from the probe-tip will be present at the input of the Bode 100, risking damage of the device. Probes like the PML 111O and the PHV1000-O contain the divider in the probe-tip to avoid this issue. The figure below tries to depict the problem.

2021-06-09_Probe_Circuit

10:1 Probe PML 111O

The PML 111O is a passive 10:1 probe manufactured by PMK, optimized for the use with Bode 100. It features a unique 1 MΩ design, perfectly matched to the ac-coupled inputs of Bode 100. It offers great protection to the inputs of the Bode 100 and a flat frequency response up to 50 MHz. The probes are pre-compensated during production and can be fine-tuned by the user.

Use the PML 111O to:

  • Perform highly accurate loop gain measurements
  • Reduce capacitive loading of your circuit
  • Protect the input channels of your Bode 100

Key Features and some technical data:

  • Compact 2.5 mm probe design
  • 1 MΩ || 12.5 pF input impedance for lowest noise
  • Exchangeable gold-plated spring-tip
  • Attenuation ratio: 10:1
  • Maximum working voltage: 400 V

Delivery includes:

  • Probe PML 111O with spring tip and protective cap
  • Solid probe tip (CuBe 0.5 mm)
  • Ground lead & ground spring-contact
  • Sprung hook
  • BNC adapter
  • Isolation cap
  • PCB adapter kit
  • Color-coding rings (3x4 colors)
  • Printed user-manual in English language
PML_111O_Probe

PML 111O - Passive 10:1 probe shown with probe accessories

Please download the instruction manual for more information and technical data...

Manual PML111O

(2 MB)

Download

100:1 Probe PHV 1000-O

The PHV 1000-O is a passive 100:1 probe manufactured by PMK, optimized for the use with Bode 100. It is based on the PHV high-voltage series of PMK

Use the PHV 1000-O to:

Key Features and some technical data:

  • 5 mm probe design
  • 50 MΩ || 7.5 pF input impedance
  • Exchangeable gold-plated spring-tip
  • Attenuation ratio: 100:1
  • Maximum working voltage: 2000 V

Delivery includes:

  • Probe PHV 1000-O with spring tip and protective cap 5.0-L
  • Solid probe tip (CuBe 0.8 mm)
  • Ground lead (22cm)
  • Sprung hook 5.0-L
  • Insulating cap 5.0-L
  • Adjustment Tool T
  • Printed user-manual in English language
PHV1000-O_Probe

PHV 1000-O  passive 100:1 probe shown with probe accessories

Please download the following documents for more information and technical data...

Manual PHV 1000-O

(2 MB)

Download

Datasheet PHV 1000-O

(1 MB)

Download

Manufactured by PMK GmbH (Germany)

The PML 111O as well as PHV 1000-O are manufactured by PMK, one of the leading independent manufacturers of probes. Find out more at: www.pmk.de/en

Optional probe accessories from PMK

A wide range of accessories for the 2.5 mm and 5mm PMK probes are available for purchase from PMK. All 2.5 mm accessories also fit on the PML 111O. The 5mm PHV accessories fit to the PHV 1000-O Check out the following pages for more information on replacement tips, probe-holders, IC contacting systems and more: