Introduction：
NMHC 4MM 是由德国 Schwarzbeck 公司生产的天线巴伦设备，授权由深圳EUTTEST代理销售和服务。这个低损耗宽带巴伦的转换比是4:1，带有 N 型母连接器，适用于 VHF 频率范围内的接收和传输应用。主要应用是根据 ISO 11452-9（附件 C.5）在 20 MHz 至 220 MHz 频率范围内使用扁平双锥元件 419 NJ 对手持式发射机进行抗扰度测试。无需任何工具，只需手动使用巴伦上的M4 螺钉即可快速拆卸和更换扁平双锥元件。
Technical parameters：
<<<<提醒：左右滑动表格>>>> | Model number | NMHC 4MM |
| manufacturer | Schwarzbeck |
| agent | Shenzhen EUTTEST |
| Test Frequency | 50kHz-300MHz |
| impedance | 50Ω |
| 传输比 | 200Ω：50Ω |
| SWR | <2 |
| Maximum input power | 30W-40W |
| size | 75mm*322mm*28mm |
| 巴伦传输损耗 | 0.3-0.6dB |
| weight | 300克 |
| 建议搭配的产品 | 419 NJ ：符合ISO 11452-9的双锥元件 Spacer 50 ：50mm测试距离定位配件 |
Graph of related technical parameters：
天线巴伦的VSWR曲线图
天线巴伦的传输损耗曲线图
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