Anritsu MG3660A Digital Modulation Signal Generator

The Anritsu MG3660A is a digital modulation signal generator engineered for wireless communication testing across telecommunications, aerospace, and related industries. This economic variant of the MG3671A/B delivers precise signal generation with support for multiple modulation formats and a modulation bandwidth extending to 160 MHz. The instrument combines frequency coverage from 300 kHz to 2.75 GHz with output levels spanning -143 dBm to +13 dBm, making it suitable for complex modulation and signal integrity validation.

Technical Specifications

• Frequency range: 300 kHz to 2.75 GHz


• Carrier frequency accuracy: ±2 ppm (internal reference)


• Internal reference oscillator: 10 MHz with aging rate ≤2 × 10⁻⁸/day


• Temperature stability: ≤±5 × 10⁻⁸ across 0° to 50°C


• External reference input: 10 MHz or 13 MHz (±10 ppm), 2 to 5 Vp-p Output Signal


• Output level range: -143 dBm to +13 dBm


• Output level resolution: 0.1 dB


• Output impedance: 50 Ω, N-type connector


• Level accuracy: ±1 dB (≤1000 MHz), ±2 dB (>1000 MHz)


• Continuously-variable output: 20 dB range in 0.1 dB steps


• Level units: dBm, dBµ, µV, mV, V Signal Purity


• Spurious: ≤-65 dBc (≥100 kHz offset, ±100 MHz bandwidth); ≤-50 dBc (full band)


• SSB phase noise: ≤-116 dBc/Hz at 100 kHz offset (CW)


• Adjacent channel leakage power ratio: ≤-45 dB (25 kHz offset); ≤-62 dB (50 kHz offset) Modulation


• Supported types: AM, FM, PM, FSK, MSK, PSK, QAM, custom modulation


• Modulation bandwidth: Up to 160 MHz

Key Features

• Dual reference oscillator options with selectable 10 MHz internal or external 10/13 MHz input


• Multiple output level units for flexibility across measurement domains


• Low spurious and phase noise performance for demanding modulation schemes


• USB, LAN, and GPIB interfaces for remote operation and integration

Typical Applications

• Digital modulation validation and receiver testing


• Telecommunications equipment characterization


• Aerospace signal generation and system verification


• Modulated signal source for complex RF testing

Compatibility & Integration The MG3660A maintains front panel operation identical to MG3670B/C and MG3671A/B models. Standard connectivity includes USB, LAN, and GPIB for laboratory and automated test environments. Note: This model was discontinued as of September 2002; the MG3681A has been identified as a potential replacement.