Demodulator Component - Satellite IF Range 950-2150 MHz

Product Specifications

Technical details and manufacturing context for Demodulator

Definition

A demodulator is a critical component within a receiver circuit that performs the inverse function of a modulator. It recovers the original baseband signal (such as audio, video, or data) from a modulated radio frequency (RF) or intermediate frequency (IF) carrier wave, enabling the information to be processed, amplified, or converted for output. In the context of satellite communication, demodulators are used in receivers to decode signals from LNB (low-noise block) downconverters. Typical parameters for such a demodulator include an input frequency range of 950–2150 MHz (typical satellite IF range), an input level range of -65 to -25 dBm (below -65 dBm may lose lock), and a symbol rate of 2–45 MSps for QPSK/8PSK demodulation. Demodulation accuracy (EVM) is specified as ≤5% for 8PSK at 30 MSps. The carrier lock range is ±5 MHz with automatic frequency control. Supply voltage is 12–24 V DC with reverse polarity protection, and power consumption is ≤5 W at nominal supply. Operating temperature ranges from -40 to 85 °C (IEC 60068-2-1/2), storage temperature from -55 to 125 °C (IEC 60068-2-1/2), and humidity (non-condensing) from 5% to 95% RH at 40 °C (IEC 60068-2-78). Ingress protection is IP54–IP65 (IEC 60529) for outdoor enclosures. The board-level module dimensions are 100×60×25 mm (W×D×H) and weight is ≤150 g without connectors. Materials typically include semiconductor (silicon, gallium arsenide), ceramic substrate, copper, and solder. This directory entry provides reference ranges; actual values must be confirmed with the legal manufacturer or supplier for the specific model and application.

Working Principle

The demodulator operates by reversing the modulation process applied at the transmitter. For amplitude modulation (AM), it typically uses envelope detection or synchronous detection to recover the signal's amplitude variations. For frequency modulation (FM), it uses a frequency discriminator or phase-locked loop (PLL) to convert frequency variations back into voltage variations. The specific circuit (e.g., diode detector, product detector, quadrature detector) depends on the modulation scheme (AM, FM, PM, QAM, etc.). In satellite receivers, demodulators often handle QPSK or 8PSK, using carrier recovery and symbol timing recovery to extract the baseband data. The input signal is mixed down to an intermediate frequency, filtered, and then demodulated. The output is a digital bitstream that can be processed by downstream circuitry.

Common Materials

Semiconductor (Silicon, Gallium Arsenide), Ceramic Substrate, Copper, Solder

Technical Parameters

Parameter	Typical range	Notes & selection driver
Input Frequency Range	950–2150 MHz	Typical satellite IF range
Input Level Range	-65–-25 dBm	Below -65 dBm may lose lock
Symbol Rate	2–45 MSps	QPSK/8PSK demodulation
Demodulation Accuracy (EVM)	≤5 %	For 8PSK at 30 MSps
Carrier Lock Range	±5 MHz	Automatic frequency control
Supply Voltage	12–24 V DC	Reverse polarity protected
Power Consumption	≤5 W	At nominal supply
Operating Temperature	-40–85 °C	Extended temperature rangeIEC 60068-2-1/2
Storage Temperature	-55–125 °C	Non-operatingIEC 60068-2-1/2
Humidity (Non-condensing)	5–95 % RH	At 40°CIEC 60068-2-78
Ingress Protection	IP54–IP65	For outdoor enclosuresIEC 60529
Dimensions (W×D×H)	100×60×25 mm	Board-level module
Weight	≤150 g	Without connectors

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Mixer / Multiplier
Combines the incoming modulated signal with a local oscillator signal to produce sum and difference frequencies, a key step in synchronous detection.

Material: Semiconductor
Local Oscillator
Generates a stable reference signal at the carrier frequency (or a related frequency) required for the demodulation process.

Material: Quartz Crystal, Semiconductor
Low-Pass Filter
Removes high-frequency components (like the carrier and its harmonics) after mixing, leaving only the recovered baseband signal.

Material: Resistors, Capacitors, Inductors
Phase-Locked Loop Optional
Tracks the carrier to demodulate FM, where an envelope detector cannot.
Diode Detector Optional
Recovers the envelope directly on AM builds, with no mixing needed.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Receiver Circuit

View system integration details

Satellite Modem

View system integration details

Manufacturers of Demodulator

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Frequently Asked Questions

What is the typical input frequency range for this demodulator?

The typical satellite IF range is 950–2150 MHz. This is the frequency range over which the demodulator is designed to accept input signals. Always confirm the exact range for your specific model with the manufacturer.

What modulation schemes does this demodulator support?

The parameters indicate support for QPSK and 8PSK demodulation, with a symbol rate range of 2–45 MSps. The actual supported schemes may vary by model; verify with the supplier.

What is the operating temperature range?

The operating temperature range is -40 to 85 °C, tested according to IEC 60068-2-1/2. Storage temperature is -55 to 125 °C. Ensure your application environment stays within these limits.

What is the power supply requirement?

The supply voltage is 12–24 V DC with reverse polarity protection. Power consumption is ≤5 W at nominal supply. Use a regulated DC supply within this range and verify with the manufacturer.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	N/A (electronic component)
other spec:	Carrier Frequency Range: 1 MHz to 2.4 GHz, Input Signal Level: -30 dBm to +10 dBm
temperature:	-40°C to +85°C

Demodulator

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