Keysight (Agilent)
Keysight (Agilent) 778D
100MHz-2GHz Dual Directional Coupler
0 Hz to 18 GHz Frequency Range
Type-N (female) Connector Type
Two-Resistor Power Divider Power Splitter Type
50 Ohm Impedance
6 dB (nominal) Insertion Loss

| Attribute | Value |
|---|---|
| Frequency Range | 0 Hz to 18 GHz |
| Connector Type | Type-N (female) |
| Power Splitter Type | Two-Resistor Power Divider |
| Impedance | 50 Ohm |
| Insertion Loss | 6 dB (nominal) |
| Isolation | 6 dB (nominal) |
| Maximum Input Power | 1 W (30 dBm) |
| VSWR | 1.5:1 maximum |
| Number of Output Ports | 2 |
| Operating Temperature Range | 0°C to +55°C |
| Model | 778D |
|---|
The Keysight (Agilent) 778D is a coaxial dual-directional coupler engineered for swept RF measurements from 100 MHz to 2 GHz. With high directivity (>36 dB to 1 GHz) and ±0.5 dB mean coupling accuracy, it is ideal for reflectometer applications. Its closely tracking auxiliary arms enhance measurement precision, especially when paired with sweep oscillators. The coupler features nominal 20 ±1.5 dB coupling, maximum SWR of 1.1, and supports power ratings up to 50 W average and 500 W peak, ensuring minimal insertion loss across the band.
Perfect for accurate, bidirectional RF testing in reflectometry and network analysis setups.
Testwall can supply the used Keysight (Agilent) 778D, fully tested. With expert support and global delivery, Testwall ensures high-performance instrumentation with unmatched reliability and service quality. Please contact us directly if you need calibration or repair of the Keysight (Agilent) 778D.





