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Instrument/Observer Positioning for Best Measurements
Model 820 Technical Reference
Instrument/Observer Positioning for Best Measurements
Measurements can be made with the Model 820 held in one
hand, with the arm extended away from the body; however,
better measurements can be made with the Model 820 placed
on a tripod.
AC and DC Outputs
The output impedance is 600 ¾ for both the AC and DC out-
puts of the Model 820. For minimal error use instruments with
Š 100 k¾ input impedance when making AC or DC output
readings.
AC Output
• Output Impedance: 600 ¾
• Gain: 0 dB or 20 dB (User Selectable)
• Measurement Range: 88.0 dB
DC Output
• Output Impedance: 600 ¾
• Scale: 20 mV/dB
• Measurement Range: 105.0 dB
• Voltage Range: 0 to 3 volts
• Temperature Coefficient: 936 µV/° C
Reference Frequency
The reference frequency is 1000 Hz.
