The Keysight (Agilent HP) 8561B is a high-performance portable RF spectrum analyzer designed for RF and microwave design, manufacturing, and field-service applications. It features fully synthesized tuning, a built-in frequency counter, digital resolution bandwidths (10 Hz, 30 Hz, and 100 Hz), and integrated AM/FM demodulators, offering outstanding dynamic range and sensitivity in a rugged, portable package.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | HP-IB (GPIB) |
| Display | CRT |
| Warm-up Time | 5 minutes (from ambient temperature to meet frequency stability specs) |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 115 / 230 VAC nominal, 47 to 66 Hz (400 Hz for 115 VAC), <180 W |
| Operating Temperature | 0 to +55 °C |
| Dimensions (W×H×D) | 325 mm x 187 mm x 461 mm |
| Weight | 20 kg |
Frequency Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 50 Hz to 6.5 GHz |
| Tuning Type | Synthesized tuning |
| Frequency Counter | Built-in |
Resolution and Video Bandwidths
| Parameter | Value |
|---|---|
| Resolution Bandwidth (RBW) Range | 10 Hz to 2 MHz |
| Video Bandwidth (VBW) Range | 1 Hz to 1 MHz |
Amplitude Specifications
| Parameter | Value |
|---|---|
| Minimum Displayed Average Noise | -130 dBm |
| Maximum Dynamic Range | 128 dB |
| Input Attenuator Range | 0 to 70 dB in 10 dB steps |
| Sensitivity | -130 dBm |
Demodulation Options
| Parameter | Value |
|---|---|
| Demodulation Modes | AM, FM |
Inputs and Outputs
| Parameter | Value |
|---|---|
| RF Input Impedance | 50 ohms |
| RF Input Connector | Type-N female |
| Calibrator Output | 300 MHz, -10 dBm |
Physical and Environmental
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40°C to +75°C |
Frequency
| Parameter | Value |
|---|---|
| Frequency Span Range | 0 Hz, 100 Hz to 6.5 GHz |
| Standard Reference Aging Rate | ±1 x 10^-7 per year |
| Frequency Reference Temperature Stability | ±1 x 10^-8 (standard) / ±1 x 10^-6 (with Option 103) |
Spectral Purity
| Parameter | Value |
|---|---|
| Phase Noise at 30 kHz Offset | ≤ -103 dBc/Hz (1 GHz carrier) |
| Phase Noise at 100 kHz Offset | ≤ -110 dBc/Hz (1 GHz carrier) |
Sweep
| Parameter | Value |
|---|---|
| Sweep Time Range (Span ≥ 100 Hz) | 50 ms to 100 s |
| Sweep Time Range (Zero Span) | 50 µs to 100 s |
Maximum Ratings
| Parameter | Value |
|---|---|
| Maximum Safe RF Input Power | +30 dBm (1 W) with ≥10 dB RF attenuation |
| Maximum DC Input Voltage | 0 V |
Amplitude
| Parameter | Value |
|---|---|
| Scale Display Range (Logarithmic) | 1, 2, 5, 10 dB per division |
Spurious Responses
| Parameter | Value |
|---|---|
| Residual Responses (200 kHz - 6.5 GHz) | ≤ -90 dBm (with 0 dB attenuation) |
Inputs & Outputs
| Parameter | Value |
|---|---|
| 1st LO Output Power | +16.5 dBm ± 2.0 dB |
| External Reference Input Frequency | 10 MHz |
| External Reference Input Power | -10 dBm to +10 dBm |
| Reference Output Frequency | 10 MHz |
| Reference Output Power | > 0 dBm |
| Sweep Output Voltage | 0 V to +10 V ramp |
Amplitude Accuracy
| Parameter | Value |
|---|---|
| Logarithmic Scale Fidelity | Incremental: ±0.1 dB/dB over 0 to -80 dB range |
| Linear Scale Fidelity | ±3% of reference level |
| Resolution Bandwidth Switching Uncertainty | < ±0.5 dB (referred to 300 kHz RBW) |
| Input Attenuator Switching Uncertainty | < ±0.5 dB (at 100 MHz, 20 to 70 dB settings, referred to 10 dB setting) |
Performance
| Parameter | Value |
|---|---|
| Sweep Time Accuracy | ±10% |
Environmental
| Parameter | Value |
|---|---|
| Operating Altitude | Up to 4,570 m (15,000 ft) |
| Non-operating Altitude | Up to 15,240 m (50,000 ft) |
| Humidity | 95% relative humidity at 40 °C for 5 days |
Compliance
| Parameter | Value |
|---|---|
| EMI Compatibility | Conducted and radiated emissions meet MIL-STD-461C, Part 7, RE02 and CE03; also FTZ 526/527 |
| MIL-T-28800D Compliance | Meets MIL-T-28800D, Type III, Class 3, Style C |
Technology
RF Spectrum Analysis
Applications
RF and Microwave Testing, Signal Analysis, Spectral Measurements