The Keysight (Agilent/HP) 8757E is a classic 3-port scalar network analyzer designed to measure insertion loss, gain, return loss, SWR, and power quickly and accurately. It features three detector inputs and two independent display channels with a 75 dB dynamic range, supporting coaxial measurements up to 50 GHz and waveguide measurements up to 110 GHz.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | GPIB (HP-IB), Dedicated 8757 System Interface, External Sweep Input, External Trigger Input, Modulator Drive Output, DAC Output, Aux ADC Input |
| Display | 9-inch monochrome CRT |
| Warm-up Time | 30 minutes |
Physical
| Parameter | Value |
|---|---|
| Operating Temperature | 0 to 55 °C |
| Dimensions (W×H×D) | 177 mm H × 425 mm W × 482 mm D |
| Weight | 20.0 |
Measurement & Performance
| Parameter | Value |
|---|---|
| Frequency Range | 10 MHz to 50 GHz (coaxial), up to 110 GHz (waveguide) depending on detector |
| Dynamic Range | 76 dB (-60 dBm to +16 dBm with standard detectors) |
| Number of Detector Inputs | 3 (Channels A, B, and R) |
| Number of Display Channels | 2 (Channels 1 and 2) |
| Vertical Scale Resolution | 0.1 to 20 dB/division |
| Reference Level Range | -90 to +90 dBm in 0.01 dB steps |
| Measurement Resolution | 0.01 dB |
| Sweep Points | 101, 201, 401, 801, or 1601 points |
| Trace Noise | 0.01 dB peak-to-peak typical |
Input & Interface
| Parameter | Value |
|---|---|
| Modulation Drive Output | 27.778 kHz ± 20 Hz, 8 V p-p nominal |
| External Sweep Input | 0 to 10 V nominal |
| External Trigger Input | TTL compatible |
| Active Detector Bias | Bias provided for all three inputs (A, B, R) |
Measurement Functions
| Parameter | Value |
|---|---|
| Calibration Modes | Thru (transmission calibration), Short/Open (reflection calibration) |
| Limit Lines | Two independent limit lines per channel for pass/fail testing |
| Trace Memory | Stores trace for normalization (Input - Memory) |
| Marker Functions | 5 active markers, delta markers, min/max search, bandwidth search |
| Averaging | Exponential averaging, factors 1 to 256 |
| Save/Recall Registers | 9 non-volatile save/recall registers for instrument states |
Compatible Accessories
| Parameter | Value |
|---|---|
| Compatible AC Detectors | HP 11664A, 11664B, 11664C, 11664E |
| Compatible AC/DC Detectors | HP 85025A, 85025B, 85025C, 85025D, 85025E |
| Compatible Precision Detectors | HP 85037A, 85037B |
| Compatible Directional Bridges | HP 85027A, 85027B, 85027C, 85027D, 85027E |
| Compatible Power Splitters | HP 11667A, 11667B, 11667C |
| Compatible Swept RF Sources | HP 8350B, HP 8360 series, HP 8370 series |
Physical & Environmental
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 to +75 °C |
| Maximum Operating Humidity | 95% relative humidity at 40 °C (non-condensing) |
| Altitude Limits | Up to 4,570 meters (15,000 feet) operating |
| Safety Certifications | CSA Certified, IEC 348 compliant |
Options
| Parameter | Value |
|---|---|
| Option 1CP | Rack mount flange kit with handles |
Display & Screen
| Parameter | Value |
|---|---|
| Display Type | 9-inch monochrome CRT |
| CRT Graticule | Internal, 8 x 10 divisions |
Modulation Drive
| Parameter | Value |
|---|---|
| Modulation Signal Output Level | > +8 V (high), < +0.2 V (low) into 10 kΩ |
| Modulation Frequency Accuracy | 27.778 kHz ± 20 Hz |
| Modulation Frequency | 27.778 kHz |
| Modulation Frequency Tolerance | ±20 Hz |
| Modulation Output Impedance | 600 Ω |
Inputs & Outputs
| Parameter | Value |
|---|---|
| Stop Sweep Port | TTL compatible, active low |
| Horizontal Sweep Input Range | 0 to +10 V nominal |
| GPIB Interface Ports | 2 separate ports (HP-IB general control and dedicated 8757 System Interface) |
Power Requirements
| Parameter | Value |
|---|---|
| AC Input Voltages | 100 / 120 / 220 / 240 V ± 10% (switch selectable) |
| AC Input Frequency | 48 to 66 Hz |
Rear Panel Inputs & Outputs
| Parameter | Value |
|---|---|
| Horizontal Input Impedance | 10 kΩ (nominal) |
Sweep Characteristics
| Parameter | Value |
|---|---|
| Minimum Sweep Time | 40 ms |
Technology
Scalar Network Analysis
Applications
RF and Microwave Component Characterization