Features:

• AC Mains Input Voltage: 90 to 270 V AC
• AC Mains Input Frequency: 48 Hz to 65 Hz
• Power Output (0.7 Power Factor): 975 VA @ TA=25°C; 750 VA @ TA=55°C
• Output Voltage Ranges: Standard: 0 to 135 V rms or 0 to 270 V rms; Optional: 0 to 67.5 V rms or 0 to 135 V rms
• Load Regulation: ± 1%, 45 Hz to 5 k Hz; ± 5%, 5 kHz to 10 kHz, (Unity Power Factor)
• Line Regulation: ± 0.1% of full output for a 10% line change
• Full Power Frequency Range: Standard: 45 Hz to 5 kHz; Optional: 45 Hz to 10 kHz
• Frequency response: ±0.5dB; 45 Hz to 5 kHz
• Phase matching: ±1.5 degrees, 45 to 2 kHz
• Efficiency: 55% at full power out at 135V at unity power factor
• AC Noise Level: 70dB rms below full rms output with shorted input; 60dB below full peak-to-peak output with shorted input; 50dB below full peak-to-peak output at full rated power output
• Overload/Short Circuit Overpower Protection
• Overtemperature Protection
• Amplifier Drive: 5 volts rms (typical) prduces full scale output

The California Instruments 971XP is a 975VA AC power source with a less than 60 dB maximum when mounted in equipment rack measured three feet from center, "A" weighted scale. The front panel meter monitors output voltage or load current with a resolution of 1V or 0.1A.