The HP Agilent 3585A is a high-performance spectrum analyzer optimized for low-frequency applications, covering the 20 Hz to 40.1 MHz frequency range. Utilizing an internal microprocessor and calibration routine, it achieves a high overall measurement accuracy within 0.4 dB, and offers excellent frequency resolution down to 0.1 Hz. The instrument is equipped with a built-in tracking generator and a dynamic range better than -80 dB, making it highly effective for precision RF and baseband measurements.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | HP-IB (GPIB) |
| Display | 9-inch Vector-drawn CRT |
Physical
| Parameter | Value |
|---|---|
| Operating Temperature | 0 to 55 °C |
| Dimensions (W×H×D) | 426 × 222 × 630 mm |
Frequency Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 20 Hz to 40.1 MHz |
| Frequency Span Range | 0 Hz (zero span) to 40.1 MHz (full span) |
| Frequency Resolution | 0.1 Hz |
Bandwidth Specifications
| Parameter | Value |
|---|---|
| Resolution Bandwidth (RBW) Range | 3 Hz to 30 kHz |
| RBW Steps | 1-3-10 sequence |
Amplitude Specifications
| Parameter | Value |
|---|---|
| Amplitude Measurement Range | -137 dBm to +30 dBm (50/75 Ω) or 31 nV to 22 V (1 MΩ) |
| Dynamic Range | Better than -80 dB |
| Overall Amplitude Accuracy | Within 0.4 dB (maintained by internal auto-calibration) |
Tracking Generator
| Parameter | Value |
|---|---|
| Tracking Generator Frequency Range | 20 Hz to 40.1 MHz |
| Tracking Generator Output Level Range | 0 dBm to -11 dBm |
| Tracking Generator Output Level Adjustment | Single-turn knob |
Inputs & Outputs
| Parameter | Value |
|---|---|
| RF Input Impedance Options | 50 Ω, 75 Ω, 1 MΩ |
| RF Input Connectors | BNC |
| Maximum Input Level | +30 dBm (50 Ω/75 Ω), 42 V peak (1 MΩ) |
Sweep
| Parameter | Value |
|---|---|
| Sweep Time Range | 0.2 s to 9999 s |
Bandwidth
| Parameter | Value |
|---|---|
| Video Filter Bandwidth Range | 1 Hz to 30 kHz |
Amplitude
| Parameter | Value |
|---|---|
| Average Noise Level | -137 dBm (with 50 Ω input, 3 Hz RBW) |
| Reference Level Range | -100 dBm to +30 dBm |
| Input Attenuator Range | 0 to 50 dB in 10 dB steps |
Performance
| Parameter | Value |
|---|---|
| Spurious Responses (Non-Harmonic) | <-80 dBc |
| Harmonic Distortion | <-80 dBc |
| Marker Resolution | 0.1 Hz (frequency), 0.01 dB (amplitude) |
Frequency Reference
| Parameter | Value |
|---|---|
| External Reference Input | 1, 2, 5, or 10 MHz (at least 0 dBm into 50 Ω) |
| Internal Reference Output | 10.000 MHz (at least 0 dBm into 50 Ω) |
RF Inputs
| Parameter | Value |
|---|---|
| 1 MΩ Input Capacitance | < 30 pF |
| Maximum Input Level (1 MΩ) | 42 V peak (AC + DC) |
Marker Features
| Parameter | Value |
|---|---|
| Marker Amplitude Resolution | 0.01 dB |
Dynamic Range & Rejection
| Parameter | Value |
|---|---|
| Image Response Rejection | > 80 dB |
| IF Feedthrough Rejection | > 80 dB |
Environmental
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 °C to +75 °C |
Technology
Superheterodyne Spectrum Analyzer
Applications
Low-frequency RF measurements, baseband testing, and filter characterization