Tektronix 492 50 kHz to 21 GHz Portable Spectrum Analyzer

The Tektronix 492 is a high-performance portable spectrum analyzer designed for precision RF and microwave signal analysis. Covering a wide frequency range from 50 kHz to 21 GHz, this unit is ideal for a variety of applications, including telecommunications, radar system analysis, electromagnetic interference (EMI) testing, and general RF troubleshooting.

Key Features:

• Wide Frequency Coverage: Spanning from 50 kHz to 21 GHz, allowing for comprehensive signal analysis across multiple bands.
• Portable Design: Despite its advanced capabilities, the Tektronix 492 is a compact and portable unit, making it well-suited for fieldwork and lab environments alike.
• High Resolution and Sensitivity: Equipped with a narrow resolution bandwidth (RBW) to detect weak signals in the presence of strong interference.
• Multiple Display Modes: Includes logarithmic and linear display scaling, making it easier to analyze signal power variations.
• Advanced Signal Processing: Offers features like video filtering, peak detection, and averaging to enhance measurement accuracy.
• Built for Durability: The rugged design ensures reliable performance in demanding conditions.

Applications:

• RF and Microwave Signal Analysis: Monitor and analyze RF transmissions across a broad spectrum.
• Radar and Military Communications: Used in defense applications to evaluate radar signals and military-grade communication systems.
• Electromagnetic Interference (EMI) Testing: Identify and troubleshoot sources of interference in electronic systems.
• Wireless and Broadcast Engineering: Evaluate broadcast signals, cellular networks, and satellite communications.

The Tektronix 492 remains a trusted tool in the RF industry due to its versatility, precision, and robust design. Whether in the lab or the field, this spectrum analyzer provides the accuracy and reliability required for complex signal analysis tasks.

Specifications

General Specifications

• Model: Tektronix 492
• Type: Portable Spectrum Analyzer
• Frequency Range: 50 kHz to 21 GHz
• Frequency Accuracy: ±(2 × 10⁻⁶) of frequency readout
• Frequency Stability: ±5 × 10⁻⁷ per day

Frequency & Resolution

• Resolution Bandwidth (RBW):
  • 1 kHz to 3 MHz in selectable steps
  • Minimum resolution: 1 kHz
• Video Bandwidth: 10 Hz to 3 MHz
• Sweep Time: 10 µs to 10 sec, adjustable

Amplitude Characteristics

• Dynamic Range: 80 dB
• Display Range: -120 dBm to +30 dBm
• Amplitude Accuracy: ±2 dB
• Display Scale:
  • Logarithmic: 10 dB/division
  • Linear: 10 divisions full scale

Input & Output

• Input Impedance: 50 Ω
• Maximum Safe Input Power: +30 dBm (1W)
• Input Connector: Type N (50 Ω)
• IF Output: 21.4 MHz
• Video Output: Provides baseband signal output for external monitoring

Display & Controls

• Screen Type: CRT with graticule overlay
• Trace Storage: Analog persistence display
• Markers & Cursors: Frequency and amplitude markers for precise measurements
• Tuning Modes: Manual, center frequency tuning, and span adjustment

Physical & Power

• Dimensions: Approximately 16.8” W × 8.3” H × 23.5” D
• Weight: Approx. 45 lbs (20 kg)
• Power Requirements:
  • 100V, 120V, 220V, or 240V AC
  • 50/60 Hz, 180W

Additional Features

• Preselector for High-Frequency Accuracy
• Built-in Attenuator (0–70 dB, 10 dB steps)
• Optional Tracking Generator for Signal Generation Applications

The Tektronix 492 is a rugged, field-ready spectrum analyzer known for its precision, reliability, and broad frequency coverage, making it an excellent choice for RF engineers and technicians working in demanding environments.