参数对比:
型号 | VP-7723D | VP-7727D | VP-7725D | VP-7782D | |
产品个性 | 1-CH普及型 | 2-CH普及型. | 2-CH 高性能 | 2-CH 高性能 | |
信号源 | BAL |
| 1CH (可选择) | 2CH |
|
| UNBAL | 1CH | 2CH | 2CH(可设置) | ○ 1CH |
| 失真度 | 0.0005% (1kHz典型值) | 0.0005% (1kHz典型值) | 0.00005% (1kHz典型值) | 0.0001% (THD/典型值) |
输入通道数 | BAL | 1 | 2 | 2 | 2 |
测试功能 | 频率 | ● | ● | ● | ● |
| AC LEVEL | ● | ● | ● | ● |
| DC LEVE | ● | ● | ● | ● |
| S/N | ● | ● | ● | ● |
| 失真度 | ● | ● | ● | ● |
| D-RANGE |
|
|
| ● |
| IMD |
|
|
| ● |
| SINAD |
| ● |
| ● |
| RATIO |
| ● | ● | ● |
| W&F(OPT) | ● | ● | ● |
|
失真度 | 测量量程 | -10dB~-80dB | -10dB~-80dB | -10dB~-90dB | 0dB~-100dB |
| 残留失真(1kHz典型) | <-100dB | <-100dB | <-120dB(THD) | <-110dB(THD1) |
| 可测量zui低失真(典型) | -100dB | -100dB | -120dB(THD) | -110dB(THD1) |
| THD+N (全失真度) | ○ | ○ | ○ | ○ |
| THD |
|
| ○ | ○ |
| HD |
|
| ○ | ○ |
滤波器配备 | 前置 LPF | ◎ 20kHz | ◎ 20kHz | ◎ 20kHz | ◎ 20kHz |
| LPF | 80k/20k/15k | 80k/20k/15k | 80k/30k/20k/15k | 80k/20k/15k |
|
| + OPT | + OPT | + OPT | + OPT |
| HPF | 200Hz/100Hz | 200Hz/100Hz | 400Hz/200Hz | 400Hz/200Hz |
| PSOHO | IEC-A | IEC-A | IEC-A, CCIR468 | IEC-A |
|
| AUDIO | AUDIO | AUDIO | AUDIO |
|
| CCIR-ARM | CCIR-ARM | CCIR-ARM | CCIR-ARM |
|
| + OPT | + OPT | + OPT | + OPT |