The Keysight (Agilent/HP) 1142A is a Probe Control and Power Module designed to provide power and offset control for active probes such as the HP 1141A 200 MHz Differential Probe and the HP 1144A 800 MHz Active Probe. It offers convenient front-panel controls for coupling selection and precise multi-turn offset adjustment.
Specifications
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100 / 120 / 220 / 240 VAC (±10%), 47 - 440 Hz, 35 VA max |
| Operating Temperature | 0 to +55 °C |
| Dimensions (W×H×D) | 213 mm × 88 mm × 272 mm |
| Weight | 2.2 kg |
Input Channels and Signal Path
| Parameter | Value |
|---|---|
| Number of Input Channels | 1 |
| Input Connector Type | Custom 10-pin probe connector |
| System Bandwidth | DC to 200 MHz (when used with HP 1141A probe) |
| System Rise Time | < 1.75 ns (when used with HP 1141A probe) |
| Signal Coupling Options | AC, DC, LF Reject |
| Low-Frequency AC Coupling Cutoff | < 1.75 Hz (into 50 Ω load) |
| Low-Frequency Reject Cutoff | < 17.5 Hz (into 50 Ω load) |
Probe Power Outputs
| Parameter | Value |
|---|---|
| DC Supply Voltages to Probe | ±15 V, +5 V |
| Probe Power Connector Type | 10-pin receptacle (front panel) |
Signal Outputs and Interface
| Parameter | Value |
|---|---|
| Output Connector Type | BNC (female, front panel) |
| Output Impedance | 50 Ω |
| Signal Path Gain | 1 (unity gain, signal passed through) |
| Offset Voltage Control Range | ±1 V (with 10:1 attenuation), ±10 V (with 100:1 attenuation) |
| Propagation Delay | Approx. 7 ns |
Controls and Indicators
| Parameter | Value |
|---|---|
| Power Switch Type | Push-push button (front panel) |
| Power On Indicator | Green LED |
| Overload Indicator | Red LED |
| Offset Adjustment Control | 10-turn potentiometer (front panel) |
| Coupling Selector | 3-position slide switch |
AC Mains Power Requirements
| Parameter | Value |
|---|---|
| Line Voltage Selection | 100 / 120 / 220 / 240 VAC (±10%) selectable |
| Line Frequency Range | 47 Hz to 440 Hz |
| Maximum Power Consumption | 35 VA |
| Fuse Rating (100/120 V) | 0.5 A T (time-delay) |
| Fuse Rating (220/240 V) | 0.25 A T (time-delay) |
Physical Characteristics
| Parameter | Value |
|---|---|
| Form Factor | System II half-rack, 2U |
| Width (excluding feet/knobs) | 213 mm |
| Height (excluding feet) | 88 mm |
| Height (with feet) | 102 mm |
| Depth (excluding connectors/knobs) | 272 mm |
| Depth (with connectors/knobs) | 311 mm |
| Net Weight | 2.2 kg |
| Shipping Weight | 3.6 kg |
Environmental and Compliance
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 °C to +75 °C |
| Operating Humidity Range | Up to 95% RH (non-condensing) at +40 °C |
| Maximum Operating Altitude | 4,600 m (15,000 ft) |
| Maximum Storage Altitude | 15,300 m (50,000 ft) |
Compatibility and Accessories
| Parameter | Value |
|---|---|
| Compatible Probe Models | Keysight / HP 1141A, HP 1144A |
| Compatible Oscilloscope Input | 50 Ω BNC input |
Regulatory & Compliance
| Parameter | Value |
|---|---|
| Safety Standards | IEC 61010-1 / EN 61010-1 |
| EMC Standards | EN 55011 / CISPR 11 / EN 50082-1 |
Technology
Active Probe Power & Control
Applications
Power and control for active differential and single-ended oscilloscope probes