The Keysight (Agilent/HP) 8757D is a high-performance scalar network analyzer designed to measure insertion loss, gain, return loss, SWR, and power quickly and accurately. When paired with compatible detectors, directional bridges, and a signal source, it forms a complete measurement system capable of operating up to 50 GHz in coaxial and 110 GHz in waveguide environments. It features four display channels, AC and DC detection modes, and advanced display functionality including limit line testing, adaptive normalization, and noise figure measurement capability.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | HP-IB (IEEE-488), 8757 System Bus Interface |
| Display | High resolution color display |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100/120/220/240 Vac, 48-66 Hz |
| Operating Temperature | 0 to +55 °C |
| Dimensions (W×H×D) | 425 × 178 × 482 mm |
| Weight | 22 kg |
System Characteristics
| Parameter | Value |
|---|---|
| Measurement Types | Insertion loss, gain, return loss, SWR, power |
| Frequency Range | Up to 50 GHz in coax, up to 110 GHz in waveguide (configuration / source dependent) |
| Number of Display Channels | 4 |
| Measurement Modes | AC and DC detection modes |
Sweep and Display Characteristics
| Parameter | Value |
|---|---|
| Data Points per Trace | 101 to 1601 |
| Cursor Search Functions | Max, min, n dB, BW |
Detector Inputs
| Parameter | Value |
|---|---|
| Number of Detector Inputs | 3 (standard), 4 (optional) |
| Compatible Detectors and Bridges | Agilent 85037 series precision detectors and directional bridges |
| Internal Power Calibrator | Optional |
Connectivity and Interfaces
| Parameter | Value |
|---|---|
| Print / Plot Buffer | Internal plotter/printer buffer |
Signal Detection
| Parameter | Value |
|---|---|
| Required AC Modulation Frequency | 27.778 kHz (Square Wave) |
Environmental
| Parameter | Value |
|---|---|
| Storage Temperature | -40 to +75 °C |
Data Processing
| Parameter | Value |
|---|---|
| Averaging | 1, 2, 4, 8, 16, 32, 64, 128, or 256 traces |
Scale & Resolution
| Parameter | Value |
|---|---|
| Scale/Division (Log Magnitude) | 0.1, 0.2, 0.5, 1, 2, 5, 10, 20 dB/div |
| Display Resolution (Log Magnitude) | 0.01 dB |
| Display Resolution (SWR) | 0.001 |
Memory
| Parameter | Value |
|---|---|
| Save/Recall Registers | 9 internal instrument states |
Rear Panel I/O
| Parameter | Value |
|---|---|
| Sweep Input Voltage | 0 to 10 V |
Technology
Scalar Network Analysis
Applications
Microwave component test, insertion loss, gain, return loss, SWR, and power measurements