1-Port 50 Ohm Browser Probe
The P2105A is one of the lowest noise probes on the market, much lower than most active power rail probes. This makes it the perfect probe for TDR, voltage ripple, and impedance testing. It can measure TDR quantities when coupled with a TDR, voltage ripple in the time domain, and impedance in the frequency domain.
Key Features
- 15GHz Single-Ended Precise High Bandwidth Probe for all Time Domain Reflectometry (TDR) Applications
- 1x Attenuation
- Compatible with the Picotest J2154A PerfectPulse TDR
- Fixed pitches available: 20, 31, 40, 50, 60, 70, 80, 100, 150 mils, or GSG SMA
- Compatible with all 50Ohm Instruments
- Spring pins for easy landing
- Short pins and integrated, but removable, PDN cable for low coupling and optimum shielding
- Handheld browser style for repeatable and easy probing; Handle design fits most probe holders
- Slim low-profile housing for comfort and visibility
- Compatible with the Picotest Probe Holder

Applications *
- Power rail measurements of voltage ripple
- 1-port reflection impedance measurements (> 100mohm)
- Low-cost PCB coupon tester-Characteristic Impedance PCB traces
- Measure PCB trace length, characteristic impedance, and dielectric constant
- Locate and detect impedance mismatches
- Measure parasitic values of inductance and capacitance such as bond wires, vias, and ESL
- Measure PCB trace path rise/fall time and overshoot/undershoot
- Supports cable and trace loss modeling
* When coupled with the J2154A TDR
Custom pitches are available. The probe is compatible with all 50Ohm instruments, including the J2154A PerfectPulse TDR, vector network analyzers (VNAs), oscilloscopes, and spectrum analyzers. The probe is designed to work with the traditional single-ended TDR setup. When used with a TDR, getting it backwards won’t normally result in any damage. The P2104A and P2105A can do damage if connected backwards to an active power rail.

P2105A What’s included
- P2105A 1-Port Probe Head (additional heads sold separately)
- P2105A Probe Handle with One (1) 1m SMA or BNC-Mini SMP PDN Cable®
- 1 Year Warranty
TDRBUNDLE What’s included
- P2105A 1-Port Probe Head (additional heads sold separately)
- P2105A Probe Handle with One (1) 1m SMA or BNC-Mini SMP PDN Cable®
- J2154A PerfectPulse® Differential TDR
- Picotest TDR Demo Trace Board
- USB-C Cable
- Two (2) BNC-SMA 12″ PDN Cables®
- 1 Year Warranty


P2105A Power Rail, TDR, and Impedance Probe
Detailed Specifications
Characteristic | Rating |
---|---|
Bandwidth | DC-15GHz * |
TDR/Ripple/Impedance Head Probe Pin Pitch/Spacings | Comes in one of the following: 20 mil – 0.508mm 31mil – 0.79mm 40mil – 1.02mm 50mil – 1.27mm 60 mil – 1.52mm 70 mil – 1.78mm 80 mil – 2.03mm 100 mil – 2.54mm 150 mil – 3.81mm GSG SMA Custom pitches available |
Impedance Range | Typical 1-port impedance reflection floor -ceiling limits (~100mohms – ~100k ohms). Not probe dependent. See your instrument’s manual |
Input C: | <1pF |
Attenuation | 1X, NOT user changeable |
Probe Connectors | SMA or BNC |
Probe Loading Input | 50 ohms |
Operating Temperature | 0 to 45° C (32° F to 104° F) at 80% Relative Humidity |
Nominal Length with Cable | 1 meter |
Maximum Relative Humidity | 80% at 31° C max |
Usage | Indoor |
Altitude | 3000 m (9850 feet) |
Absolute Maximum Voltage | < 50VAC and 75VDC |
Caution:
To avoid equipment damage and/or severe injuries death or death do not use this probe close to voltages higher than 50 VAC or 75 VDC.
* Calibration dependent
Model | Description | Price |
---|---|---|
P2105A-1X | 1-Port TDR Browser Probe (1X attenuation) | $2,750.00 Add to Cart |
P2105A-1X-TIP | 1-Port TDR – Probe Head Only | $400.00 Add to Cart |
TDRBUNDLE | Picotest TDR Solution Bundle includes J2154A TDR, P2105A TDR Probe | Special Intro Price $6,745.00 (regularly $7250.00) Add to Cart |
The Picotest P2105A probe is 50 ohm 1-port transmission line ‘Browser’ probe for TDR applications. This precision probe supports a variety of measurements using the 1-port reflection methodology including primarily impedance and TDT/TDR, but also ripple, noise, PCB power rail, VRM (Voltage Regulator Module), and clock jitter. It has significant advantages in comparison to active probes and other types of passive probes.
The P2105A is a referred to as a ‘browser’ probe for its ability to easily and quickly be moved from point- to-point/rail-to-rail simply by reseating the probe points. The probe achieves a very low inductance at the tip to mitigate space constraints on a dense PCB, while eliminating the need to add additional SMA connections or other test points necessary for impedance measurements. It is especially useful when there are multiple rails to assess and there is not time or PCB iterations available to provide test point implementations for each. Repeated measurements are simplified because connection is by simply touching the tip to existing trace. The P2105A comes in various fixed pin pitches (20, 31, 40, 50, 60, 70, or 100 mil spacing with 1X attenuation; GSG SMA and custom pitches are also available).
The probe is compatible with all 50 ohm instruments, including the J2154A PerfectPulse TDR, vector network analyzers (VNAs), oscilloscopes, and spectrum analyzers. The probe is designed to work with the traditional single ended TDR setup.
P2105A Power Rail, TDR, and Impedance Probe
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