HP 11473A- 600 Ohms Balancing Transformer20 Hz to 50 kHz BNC Connectors industrialThe HP 11473AImpedance: Unbalanced: 75 Ohms, Balanced: 600 Ohms, Type BNC Connectors, Frequency: 20 Hz to 50 kHz; ±0.5%; Max Input power: +13 dBm.