Dual Pointer Millivolt Meter – High Accuracy Dual Channel Voltmeter for Lab Model: TVT-322 Measurement Range Voltage: 300 μV–100 V dB: -70 dB to +40 dB dBm: -80 to 52 dBm (0 dB = 1 Vrms, 0 dBm = 0.755 V) Measurement Error: <3% of full scale (at 1 kHz) Frequency Response 5 Hz ~ 1 MHz: ±10% 10 Hz ~ 500 kHz: ±5% 20 Hz ~ 200 kHz: ±3% 30 Hz ~ 100 kHz: ±2% (1 kHz resolution) 5 Hz ~ 500 kHz: ±3% Input Impedance: 10 MΩ ±5%, 45 pF Maximum Input Voltage 3 V — 100 V range: 500 V (DC + AC) 300 μV — 1 V range: 300 V (DC + AC) Stability: ±5% of full scale Residual Voltage: Less than 200 μV (1 mV resolution, short-circuited output) Gain: 60 dB Output voltage: 0.1 Vms ±20% of full scale (no-load) Output resistance: 600 Ω ±20% (1 kHz level) Distortion: Less than 1% of full scale Signal-to-Noise Ratio: Greater than 30 dB within the 0.3 mV range Rated Operating Temperature and Humidity: 10°C to 40°C / 85% RH (Note: The value of 100°C listed in the table has been corrected as a typographical error) Power Supply: 220 V/110 V ±10%, 50 Hz/60 Hz Dimensions: 239 × 140 × 200 mm Net Weight: 3 kg