HP / Agilent 66321D DC Source 0-15V 0-3A

The HP/Agilent 66321D is a DC source purpose-built for testing battery-powered wireless communication devices. It delivers 0–15 V and 0–3 A continuous output with 5 A peak current capability (up to 7 ms), making it ideal for characterizing current drain across device operating modes. The unit combines a precision power source with an integrated digital voltmeter and dynamic measurement system, enabling accurate battery behavior simulation and transient load response analysis in production test environments.

## Technical Specifications

**Output Ratings**
• Voltage: 0–15 V
• Continuous current: 0–3 A
• Peak current (up to 7 ms): 5 A
• Power: 45 W

**Programming Accuracy (25 °C ±5 °C)**
• Voltage: ±0.05% of setting + 10 mV
• Current: ±0.05% of setting + 1.33 mA

**DC Measurement Accuracy (25 °C ±5 °C)**
• Voltage readback: ±0.03% + 5 mV
• Current readback: ±0.2% + 0.5 mA (−3 A to +5 A); ±0.1% + 0.2 mA (−1 A to +1 A); ±0.1% + 2.5 µA (−20 mA to +20 mA)

**Transient Response and Regulation**
• Transient response time: < 20 µs
• Transient voltage drop: < 40 mV
• Load regulation: 5 mV voltage, 0.75 mA current
• Line regulation: 0.5 mV voltage, 0.75 mA current

**Ripple and Noise (20 Hz–20 MHz)**
• Voltage: 1 mV rms, 6 mV peak-to-peak
• Current: 2 mA rms

## Key Features

• Output resistance programming from −0.04 Ω to 1 Ω simulates internal battery resistance (Ni-Cad, Ni-MH, Li-Ion, Li-Polymer)
• Negative resistance programming compensates for wiring voltage drops in test fixtures
• Dynamic measurement system captures current drain across talk, active, standby, and sleep modes
• 4096-point buffer with 15 µs sampling interval
• GPIB interface for automated test integration

## Typical Applications

• Current drain characterization of mobile phones, PDAs, and portable wireless devices
• Battery life validation for Bluetooth and Wireless LAN products
• Transient load testing of cellular handsets and communication modules
• Production-volume battery emulation and power delivery analysis

## Compatibility & Integration

Supports testing of 3G, cdma2000, WCDMA, CDMA, TDMA, GSM, PCS, DECT, TETRA, PHS, NADC, Bluetooth, and Wireless LAN devices. Compatible with Keysight 14565B software for battery drain analysis.