Modulation Meter 2305

Marconi Instruments, Marconi-Ekco (MI, MEI)

Daten
Forum
Bilder
Sammlungen

  • Jahr
  • 1985 ?
  • Kategorie
  • Service- oder Labor-Ausrüstung
  • Radiomuseum.org ID
  • 364408

 Technische Daten

  • Anzahl Transistoren
  • Halbleiter vorhanden.
  • Halbleiter
  • Hauptprinzip
  • Spezialschaltung (siehe Bemerkungen)
  • Wellenbereiche
  • Wellen in den Bemerkungen.
  • Betriebsart / Volt
  • Wechselstromspeisung / 45-440 Hz, 105-120; 210-240 Volt
  • Lautsprecher
  • - Für Kopfhörer oder NF-Verstärker
  • Material
  • Metallausführung
  • von Radiomuseum.org
  • Modell: Modulation Meter 2305 - Marconi Instruments, Marconi-
  • Form
  • Tischgerät, Tasten oder Druckknöpfe.
  • Abmessungen (BHT)
  • 425 x 152 x 535 mm / 16.7 x 6 x 21.1 inch
  • Bemerkung

  • The Marconi Modulation Meter 2305 (also known as the IFR/Aeroflex 2305) is a high-performance, microprocessor-controlled test instrument designed for precise and versatile measurements on modulated radio frequency (RF) signals.

    Developed in the late 1970s/1980s, the 2305 was a foundational tool for engineers working in fixed and mobile communications, broadcasting, and general RF equipment maintenance.

    Functional Description
    The Marconi 2305 is essentially a highly refined, multi-band superheterodyne receiver integrated with sophisticated digital measurement circuitry.

    1. Automatic Operation: Its key feature is automatic tuning and ranging.4 When a signal is applied, the instrument automatically locks onto the carrier frequency and selects the appropriate measurement range for the modulation present.
    2. Architecture: Internally, the signal passes through an attenuator, a mixer (often utilising a step recovery diode-based harmonic mixer), and into an IF (Intermediate Frequency) stage.
    3. Measurement: Dedicated analog detector boards separate AM, FM, & ΦM components of the signal, which are then processed by the internal microprocessor (e.g., an NEC D8085AHC.
    4. Output: A high-quality demodulated output is provided, allowing the operator to monitor the audio or baseband signal on an external device like an oscilloscope.
    5. Calibration: An internal calibrator is included, which performs automatic calibration checks upon power-up to maintain measurement accuracy without relying on constant manual adjustments.

    Key Technical Specifications and Capabilities

    FeatureSpecification: Capability
    Carrier Frequency Range: 50 kHz to 2.32 GHz
    Modulation Types: AM, FM, ΦM
    FM Deviation: Up to 500 kHz
    AM Depth: Up to 99.9%
    Basic Accuracy: ±5% for modulation measurements
    Tuning: Automatic Tuning (to the strongest signal) or Manual tuning via keypad.
    RF Power: Direct indication of power levels from 10 mW to 1 W.
    Additional Measurements: Performs measurements for frequency, RF power, frequency response, and signal-to-noise ratio.
    Interface: GPIB (General Purpose Interface Bus, IEEE 488) for remote, automated control and integration into test systems.
    Protection: Against accidental overloads up to 25 W,

     

  • Nettogewicht
  • 13.5 kg / 29 lb 11.8 oz (29.736 lb)
  • Literaturnachweis
  • - - Manufacturers Literature (Technical Manual, TM 11-6625-3146-14 (1985))
  • Autor
  • Modellseite von Miguel Bravo-Cos angelegt. Siehe bei "Änderungsvorschlag" für weitere Mitarbeit.

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