The Keysight (Agilent) 1141A is a 200 MHz active FET differential probe designed to provide high common-mode rejection and low input capacitance, minimizing circuit loading in demanding measurement applications. It must be paired with the 1142A Probe Control and Power Module for power and control of input coupling and offset.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | Proprietary connection to 1142A Probe Control and Power Module |
Physical
| Parameter | Value |
|---|---|
| Power Supply | Powered by 1142A Probe Control and Power Module |
| Operating Temperature | 0 °C to +55 °C |
| Weight | 0.145 kg |
| Cable Length | 1.5 m |
Signal Fidelity & Electrical Performance
| Parameter | Value |
|---|---|
| Bandwidth | 200 MHz |
| Rise Time (calculated) | 1.75 ns |
| Attenuation Ratio | 1:1 (base probe), 10:1 and 100:1 with attenuators |
| DC Thermal Drift | Low |
Input Impedance & Loading
| Parameter | Value |
|---|---|
| Differential Input Resistance | 2 MΩ (between inputs) |
| Differential Input Capacitance | 3.5 pF (between inputs) |
| Input Coupling Modes | AC, DC, DC reject (controlled via 1142A) |
Common Mode Rejection & Noise
| Parameter | Value |
|---|---|
| CMRR at 1 MHz | 3000:1 (70 dB) |
| CMRR at 100 MHz | 100:1 (40 dB) |
Voltage Limits & Safety Ratings
| Parameter | Value |
|---|---|
| Maximum Non-Destructive Differential Input Voltage | ±25 V (DC + peak AC) without attenuators |
Output & Instrument Interface
| Parameter | Value |
|---|---|
| Required Instrument Termination | 50 ̩ (internal or external) |
| Compatible Power Module | Agilent/Keysight 1142A Probe Control and Power Module |
| Remote Control Capabilities | Input coupling and offset remote control |
Performance
| Parameter | Value |
|---|---|
| Common-Mode Operating Range | ±5.0 V (1:1) / ±50 V (10:1) / ±500 V (100:1) |
| Differential Operating Range | ±0.44 V (1:1) / ±4.4 V (10:1) / ±44 V (100:1) |
| DC Gain Accuracy | ±1% (excluding external attenuators) |
Environmental
| Parameter | Value |
|---|---|
| Storage Temperature | -40 °C to +75 °C |
| Operating Humidity | Up to 95% RH at 40 °C |
| Operating Altitude | Up to 4,600 m |
Electrical Characteristics
| Parameter | Value |
|---|---|
| AC Coupling Low-Frequency Cutoff (1:1) | 140 Hz |
| AC Coupling Low-Frequency Cutoff (10x Attenuator) | 14 Hz |
| AC Coupling Low-Frequency Cutoff (100x Attenuator) | 1.4 Hz |
| CMRR at DC to 100 kHz | 10,000:1 (80 dB) |
| CMRR at 10 MHz | 300:1 (50 dB) |
| DC Offset Range (1:1) | ±1.0 V |
| DC Offset Range (10x Attenuator) | ±10 V |
| DC Offset Range (100x Attenuator) | ±100 V |
| Propagation Delay | 7 ns |
| Maximum Non-Destructive Input Voltage (Each Input to Ground, 1:1) | ±25 V (DC + peak AC) |
| Maximum Non-Destructive Input Voltage (Each Input to Ground, 10x/100x) | ±200 V (DC + peak AC) |
| Output Impedance | 50 Ω |
Technology
FET Active Differential Probe
Applications
Differential Signal Measurement