The Keysight Agilent HP 8561A is a high-performance portable RF spectrum analyzer designed for analyzing signals over a frequency range of 1 kHz to 6.5 GHz. Known for its durability and laboratory-grade performance in a portable form factor, the 8561A is ideal for field service, manufacturing, and research and development environments. It features outstanding frequency accuracy, dynamic range, and spectral purity.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | HP-IB (GPIB) |
| Display | Monochrome CRT |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 90 to 140 V AC (47 to 440 Hz), 195 to 250 V AC (47 to 66 Hz); <170 W power consumption |
| Operating Temperature | 0 to +55 °C |
| Dimensions (W×H×D) | 337 mm × 187 mm × 461 mm |
Frequency Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 1 kHz to 6.5 GHz |
| Frequency Span Range | 0 Hz, 100 Hz to 6.5 GHz |
| Counter Resolution | 10 Hz to 1 MHz (selectable) |
| Residual FM | < 10 Hz p-p in 20 ms |
| Spectral Purity | < (-100 + 20 Log n) dBc/Hz at 30 kHz offset |
Bandwidth (RBW/VBW)
| Parameter | Value |
|---|---|
| Resolution Bandwidth (RBW) Range | 10 Hz to 1 MHz (in 1, 3, 10 sequence), and 2 MHz |
| Video Bandwidth (VBW) Range | 1 Hz to 3 MHz |
Amplitude & Measurement Range
| Parameter | Value |
|---|---|
| Amplitude Range | displayed average noise level to +30 dBm |
| Dynamic Range | 125 dB |
| Maximum Safe Input RF Power | +30 dBm (1 Watt) |
| Input Attenuator Range | 0 to 70 dB |
| Input Attenuator Steps | 10 dB |
Inputs, Outputs & Connectivity
| Parameter | Value |
|---|---|
| RF Input Connector Type | Type-N, female |
| RF Input Impedance | 50 ohms (nominal) |
Sweep & Trigger Specifications
| Parameter | Value |
|---|---|
| Sweep Time Range (Span > 0 Hz) | 50 ms to 100 s |
| Sweep Time Range (Zero Span) | 50 µs to 100 s |
Physical & Environmental Specifications
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 to +75 °C |
Signal Outputs
| Parameter | Value |
|---|---|
| Calibrator Output Frequency | 300 MHz |
| Calibrator Output Amplitude | -20 dBm |
Performance
| Parameter | Value |
|---|---|
| Displayed Average Noise Level (DANL) | ≤ -130 dBm (10 MHz to 2.9 GHz, 10 Hz RBW) |
| Phase Noise | ≤ -100 dBc/Hz @ 30 kHz offset (1 GHz carrier) |
| 1 dB Gain Compression | ≥ -5 dBm (10 MHz to 2.9 GHz at mixer) |
| Second Harmonic Distortion | ≤ -70 dBc (10 MHz to 2.9 GHz, -40 dBm mixer level) |
| First IF Frequency | 3.9107 GHz (for 1 kHz to 2.9 GHz band) |
| Second IF Frequency | 310.7 MHz |
| Third IF Frequency | 10.7 MHz |
| RBW Shape Factor (60 dB to 3 dB ratio) | < 15:1 (for 300 Hz to 2 MHz RBW); < 5:1 (for 10 Hz to 100 Hz RBW) |
| Log Scale Display Divisions | 10 divisions (1, 2, 5, 10 dB/division) |
| Demodulation | AM and FM (internal speaker and phone jack) |
Triggering
| Parameter | Value |
|---|---|
| Sweep Trigger Modes | Free Run, Line, Single, Video, External |
Inputs & Outputs
| Parameter | Value |
|---|---|
| IF Output (310.7 MHz) | BNC female, -20 to -10 dBm (nominal) |
| Video Output | BNC female, 0 to 1 V (nominal, open circuit) |
| Sweep Output | BNC female, 0 to 10 V (nominal, ramp) |
| External Reference Input | 10 MHz, BNC female, -2 to +10 dBm |
Environmental
| Parameter | Value |
|---|---|
| Ruggedness Compliance | Designed to meet MIL-T-28800D, Type III, Class 3, Style C |
Technology
Superheterodyne Spectrum Analysis
Applications
RF testing, spectral analysis, transmitter troubleshooting, field maintenance