The Advantest R3261A is a high-performance RF Spectrum Analyzer covering a frequency range of 9 kHz to 2.6 GHz. It is designed for analyzing RF signals with high accuracy, featuring a 1 Hz tuning resolution, built-in frequency counter, and a wide dynamic range. With standard GPIB connectivity, it is well-suited for automated test environments and manual laboratory measurements.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | GPIB (IEEE-488) standard |
| Display | CRT display (green monochrome) |
| Warm-up Time | 30 minutes |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100 to 120 VAC / 220 to 240 VAC (switchable), 50/60 Hz, ≤ 150 VA |
| Operating Temperature | 0 to 50 °C |
| Dimensions (W×H×D) | 355 mm × 177 mm × 450 mm |
| Weight | 15 |
Frequency
| Parameter | Value |
|---|---|
| Frequency Range | 9 kHz to 2.6 GHz |
| Tuning Resolution | 1 Hz |
| Frequency Span Range | 1 kHz to 2.6 GHz, and 0 Hz (zero span) |
| Reference Frequency Stability (Aging) | ±2 × 10^-6 / year |
| Reference Frequency Stability (Temperature) | ±5 × 10^-6 (0 °C to 50 °C) |
| Residual FM | < 20 Hz p-p / 0.1 s |
| SSB Phase Noise | ≤ -105 dBc/Hz @ 20 kHz offset |
| Frequency Counter Resolution | 1 Hz to 1 kHz |
Amplitude
| Parameter | Value |
|---|---|
| Amplitude Measuring Range | -130 dBm to +25 dBm |
| Maximum Safe RF Input Level | +25 dBm (with ≥ 10 dB attenuation) |
| Maximum DC Input Voltage | 0 VDC |
| RF Input Attenuator Range | 0 dB to 70 dB (10 dB steps) |
| Log Display Range | 100 dB, 50 dB, 20 dB, 10 dB |
| Linear Display Range | 10% of reference level / division |
| Amplitude Units | dBm, dBµV, dBmV, V, W |
| Reference Level Range (Log) | -109.9 dBm to +40.0 dBm |
| Display Scale Fidelity (Log) | +/- 1.5 dB over 0 to -70 dB, +/- 1.0 dB over 0 to -50 dB, +/- 0.2 dB over 0 to -10 dB |
| Display Scale Fidelity (Linear) | +/- 5% of full scale |
Bandwidth
| Parameter | Value |
|---|---|
| Resolution Bandwidth (RBW) Range | 30 Hz to 1 MHz (1-3 sequence) |
| Video Bandwidth (VBW) Range | 1 Hz to 1 MHz (1-3 sequence) |
Sweep
| Parameter | Value |
|---|---|
| Sweep Time Range | 50 ms to 1000 s |
| Sweep Trigger Sources | Free Run, Line, Single, Video, External |
Signal Processing
| Parameter | Value |
|---|---|
| Trace Detectors | Positive Peak, Negative Peak, Sample |
| Trace Storage Capacity | 2 traces (Trace A, Trace B) |
Inputs & Outputs
| Parameter | Value |
|---|---|
| RF Input Connector Type | Type-N female |
| RF Input Impedance | 50 Ω |
| RF Input VSWR | ≤ 1.5 (for ≥ 10 dB input attenuation) |
| External Reference Input | 10 MHz, -10 dBm to +5 dBm, 50 Ω |
| Calibration Output Signal | 20 MHz, -20 dBm |
| Probe Power Output | ±15 V, max 100 mA |
| Headphone Output | 8 Ω minimum impedance, mini-jack |
| Direct Plotter Output | Supported via GPIB |
| External Trigger Input | BNC female, TTL level |
| Gate Input | BNC female, TTL level |
| Monitor Output | BNC, composite video signal |
Display & System
| Parameter | Value |
|---|---|
| Memory Card Slot | JEIDA memory card slot (for state and trace storage) |
| Marker Functions | Peak Search, Next Peak, Delta Marker, Signal Track |
Physical & Environmental
| Parameter | Value |
|---|---|
| Storage Temperature Range | -20 °C to +60 °C |
| Relative Humidity | ≤ 85% (non-condensing) |
Power & Electrical
| Parameter | Value |
|---|---|
| AC Power Input Voltage Range | 90 to 132 VAC / 198 to 250 VAC (automatic selection) |
| AC Power Frequency Range | 50 / 60 Hz |
Spurious Responses
| Parameter | Value |
|---|---|
| Second Harmonic Distortion | <= -70 dBc (for input level <= -30 dBm, frequency >= 10 MHz) |
| Third-Order Intermodulation Distortion | <= -70 dBc (for two -30 dBm inputs, separation > 100 kHz, frequency >= 10 MHz) |
| Residual Responses | <= -100 dBm (with 50 ohm termination, 0 dB input attenuation, frequency >= 10 MHz) |
Receiver & Demodulation
| Parameter | Value |
|---|---|
| Demodulation | AM and FM (built-in speaker and headphone jack) |
Power Requirements
| Parameter | Value |
|---|---|
| Power Consumption | <= 150 VA |
Options
| Parameter | Value |
|---|---|
| Option 21 Reference Aging Rate | ±2 × 10^-8 / day |
| Option 21 Reference Temperature Stability | ±5 × 10^-8 (0°C to 50°C) |
| Option 11 QP Detector Bandwidths | 200 Hz, 9 kHz, 120 kHz (CISPR compliant) |
Performance
| Parameter | Value |
|---|---|
| Built-in Measurement Functions | Occupied Bandwidth (OBW), Adjacent Channel Power (ACP), 3rd Order Intermodulation, dB Down Bandwidth |
| 1 dB Gain Compression | ≥ -10 dBm (at mixer input) |
| Sweep Modes | Single, Continuous, Manual |
Technology
Analog & Digital RF Synthesis / Heterodyne Spectrum Analysis
Applications
RF Signal Analysis, Spectral Measurements, and Transmitter Testing
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