The Keysight (Agilent HP) 3585B is a high-performance 20 Hz to 40.1 MHz spectrum analyzer designed for low-frequency and RF signal analysis. Featuring a built-in tracking generator, exceptional spurious-free dynamic range up to 100 dB, and a narrow 3 Hz resolution bandwidth, it is widely used in telecommunications, audio, and baseband frequency measurements.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | HP-IB (IEEE-488) |
Physical
| Parameter | Value |
|---|---|
| Operating Temperature | 0 to 55 °C |
Frequency Specifications
| Parameter | Value |
|---|---|
| Frequency Range (50 Ohm / 75 Ohm) | 20 Hz to 40.1 MHz |
| Frequency Range (1 Megohm) | 20 Hz to 40.1 MHz |
| Frequency Resolution | 0.1 Hz |
| Resolution Bandwidth (RBW) Range | 3 Hz to 30 kHz |
| Resolution Bandwidth (RBW) Steps | 1, 3, 10 sequence |
| Video Bandwidth (VBW) Range | 1 Hz to 30 kHz |
| Video Bandwidth (VBW) Steps | 1, 3, 10 sequence |
| Reference Frequency Aging Rate | ±1 × 10^-7 per month |
Amplitude Specifications
| Parameter | Value |
|---|---|
| Amplitude Measurement Range (50 Ohm) | -137 dBm to +30 dBm |
| Harmonic Distortion | < -80 dBc |
| Intermodulation Distortion | < -80 dBc |
| Spurious Responses (Non-Harmonic) | < -80 dBc |
Tracking Generator Specifications
| Parameter | Value |
|---|---|
| Tracking Generator Frequency Range | 20 Hz to 40.1 MHz |
| Tracking Generator Output Impedance | 50 ohms |
Inputs and Outputs
| Parameter | Value |
|---|---|
| RF Input Connector Type | BNC |
| Input Impedance Options | 50 ohms, 75 ohms, 1 Megohm |
| External Reference Output Frequency | 10 MHz |
| External Reference Output Level | ≥ 0 dBm (into 50 ohms) |
| Probe Power Output | +15 Vdc, -12.6 Vdc, up to 150 mA |
| Rear Panel Display Outputs | X, Y, Z BNC connectors |
Measurement and Marker Functions
| Parameter | Value |
|---|---|
| Marker Resolution (Amplitude) | 0.01 dB |
| Noise Marker Mode | Yes |
| Trace Storage | A and B memories |
Environmental and Safety
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 °C to 75 °C |
| Warm-up Time | 20 minutes |
Input Specifications
| Parameter | Value |
|---|---|
| Input Return Loss | ≥ 26 dB (VSWR ≤ 1.1) with ≥ 10 dB attenuation; ≥ 20 dB (VSWR ≤ 1.22) with 0 dB attenuation |
Inputs
| Parameter | Value |
|---|---|
| 1 M̩ Input Shunt Capacitance | < 30 pF |
Rear Panel Outputs
| Parameter | Value |
|---|---|
| Intermediate Frequency (IF) Output Frequency | 350 kHz |
Physical Characteristics
| Parameter | Value |
|---|---|
| Shipping Weight | 52.2 kg (115 lb) |
Technology
Superheterodyne Spectrum Analyzer
Applications
Low-frequency and RF spectrum analysis, filter characterization, and signal monitoring