| Voltage measurement ranges |
| Voltage |
0.3mV to 100V, 12 ranges
（0.3mV/1mV/3mV/10mV/30mV/100mV/0.3V/1V/3V/10V/30V/ 100V）full scale |
| dB |
-90dB to 40dB (0dB＝1V) |
| dBm |
-90dBm to 42dBm (0dBm＝1mW, 600Ω) |
| Indication accuracy |
Full scale ±3% max. (1kHz) level |
Frequency response
(1kHz reference) |
5Hz to 1MHz ±10%
10Hz to 500kHz ±5%
20Hz to 200kHz ±3%
30Hz to 100kHz ±2% |
| Input impedance |
10MΩ ±5%, 50pF max |
| Voltage regulation |
±0.5% of full scale with a ±10% variation in line voltage |
| Maximum input voltage |
At 400Hz: 500V (DC ACpeak), in 1V to 100V ranges
100V (DC ACpeak), in 0.3mV to 300mV ranges |
| Temperature coefficient |
±0.08%/℃ |
| Temperature for guaranteed spec. |
10°C to 40°C, 80% max. humidity |
| Temperature for operation |
0 to 50℃ |
| Crosstalk |
80dB min. (independent , one channel terminated with 600Ω)/50dB min. (linked, with one channel terminated with 600Ω) |
| Indication value variable range |
0 to Approx. -10dB |
| Residual noise |
30µV and below (0.3mV and 1V range), with input shorted |
| Amplifier (AC) |
| Gain |
Approx. 70dB |
| Output voltage |
1V±20% offset at full scale (open circuit) |
| Output resistance |
600Ω ±20% |
| 1Vrms±20% of FS (open circuit) |
600Ω ±10% |
| Distortion |
1% max. at full scale (1kHz)
(specified in terms of S/N ratio for 0.3mV, 1mV and 1V ranges) |
| S/N |
40dB min. at full scale
(0.3mV range: 30dB min.) |
| Frequency response |
10Hz to 500kHz (±3dB) |
| line voltage |
100V, 120V, 220V, 240V (VT-181E: 230V) AC, ±10% (50/60Hz) |
| Power consumption |
11W max |
| Case dimensions/weight |
128 (W)×190 (H)×239 (D) mm /3kg |
| Maximum dimensions |
138 (W)×212 (H)×268 (D) mm |
| Accessories |
Instruction manual (1), Power cord (1), Accessory cable (CA-41) (2) |
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