The Keysight (Agilent) 85025B is a coaxial detector designed specifically for use with the 8757D scalar network analyzer. Operating over a frequency range of 10 MHz to 26.5 GHz, it supports both modulated (AC) and unmodulated (DC) detection modes, delivering high dynamic range and excellent return loss characteristics for RF and microwave measurements.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | Integrated cable with 10-pin circular connector |
Physical
| Parameter | Value |
|---|---|
| Power Supply | Powered directly by host scalar network analyzer |
| Operating Temperature | 0 to 55 °C |
| Weight | 0.24 kg |
| Cable Length | 1.22 m (48 in) |
| Shipping Weight | 1.0 kg (2.2 lb) |
RF & Microwave Performance
| Parameter | Value |
|---|---|
| Frequency Range | 10 MHz to 26.5 GHz |
| Nominal Impedance | 50 Ω |
| Maximum Input Power (CW) | +20 dBm (100 mW) |
| Maximum DC Input Voltage | ±10 VDC |
| Return Loss (10 MHz to 40 MHz) | 10 dB |
| Return Loss (40 MHz to 4 GHz) | 20 dB |
| Return Loss (4 GHz to 18 GHz) | 17 dB |
| Return Loss (18 GHz to 26.5 GHz) | 12 dB |
| Frequency Response Flatness (10 MHz to 40 MHz) | +0.25 dB / -0.75 dB |
| Frequency Response Flatness (40 MHz to 18 GHz) | ±0.5 dB |
Detection & Output Characteristics
| Parameter | Value |
|---|---|
| Dynamic Range (AC Mode) | +16 to -55 dBm |
| Dynamic Range (DC Mode) | +16 to -50 dBm |
| Detection Modes | AC (modulated) and DC (unmodulated) |
| AC Modulation Frequency | 27.778 kHz |
Physical & Mechanical Interface
| Parameter | Value |
|---|---|
| RF Input Connector Type | 3.5 mm |
| RF Input Connector Gender | Male |
| Output Interface Connection | Integrated cable with 10-pin circular male connector |
Instrumentation Compatibility & Smart Features
| Parameter | Value |
|---|---|
| Compatible Scalar Network Analyzers | Agilent / Keysight 8757D (incompatible with 8756 and 8755) |
| Internal Calibration Storage | Integrated EEPROM stores individual factory calibration data |
Environmental
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 to +75 °C |
Performance
| Parameter | Value |
|---|---|
| Maximum Peak Input Power | +24 dBm (250 mW) for pulse width < 3 µs |
RF Performance
| Parameter | Value |
|---|---|
| Frequency Response Flatness (18 GHz to 26.5 GHz) | +/- 1.25 dB |
Technology
Diode Detection
Applications
RF and Microwave Scalar Network Analysis