Keysight / Agilent / HP E1502A 8-Channel Low-Pass Filter SCP Module

The Keysight E1502A is an 8-channel low-pass filter Signal Conditioning Processor (SCP) module for VXI mainframe systems. It removes unwanted high-frequency noise from analog signals to improve measurement accuracy, featuring a fixed 2-pole design with 7 Hz 3 dB cutoff frequency. Each channel includes input over-voltage protection and open transducer detection, making it suitable for voltage, temperature, resistance, and strain measurement applications across broad ranges.

Technical Specifications Filtering Architecture

Filter Type: Fixed 2-pole, low-pass

3 dB Cutoff Frequency: 7 Hz

Gain: x1 (no on-board gain) Input Protection

Over-voltage Protection: Provided per channel

Open Transducer Detection: Provided per channel Measurement Ranges

Full-scale Voltage (DC): ±62.5 mV to ±16 V

Resistance: 128 Ω to 131 kΩ FS

Temperature (RTD): –200 °C to +850 °C

Strain: 25,000 µε (or strain gage linear limit)

Key Features

Eight independent filtering channels in a single module

Direct thermocouple support with temperature measurement capability

4-wire and 2-wire resistance measurement modes (4-wire recommended)

Compatible with Agilent current source and strain completion SCP modules for expanded measurement flexibility

Typical Applications

Low-level voltage signal conditioning from sensors (62 mV to 16 V FS)

Thermocouple, thermistor, and RTD temperature acquisition

Precision resistance measurements with series resistance mitigation

Strain gage signal processing when paired with Agilent E1506A/E1507A completion modules

Compatibility & Integration Designed for VXI mainframe integration with the E1413C scanning A/D converter, E1415A controller, E1419A multifunction module, and E1422A DAC module. The E1313A and E1413A/B VXI cards support up to four SCP modules; other VXI platforms accommodate up to eight. Integrates with complementary Agilent SCP modules including the E1501A direct input, E1503A programmable filter/gain, E1505A current source, E1506A strain completion, and E1507A.