Analog Signal Generator MG3740A
Manufacturers
Anritsu
Other Recommendations
Technical Overview
High-Performance Analog Signal Generator: 100kHz-6GHz Frequency Coverage, AM/FM/ΦM/Pulse Modulation, Dual RF Output Option, Narrowband Digital Modulation Extension for High-Purity Analog Radio Testing
📡6GHz Wideband
100kHz-6GHz range covers HF/UHF to microwave bands (Source: Frequency parameters)
📶 Modulation Suite
Standard AM/FM/ΦM/pulse modulation for voice/data signal testing (Source: Product features)
🔌 Expandable
Optional dual RF output + narrowband digital modulation (Source: Product options)
| Core Parameter | Specifications | Application Value |
|---|---|---|
| Frequency & Signal Purity | 100kHz-6GHz, low phase noise, stable output level | Test receiver sensitivity (e.g., HF radio ≤-110dBm) and selectivity (adjacent channel rejection ≥60dB) |
| Modulation Capability | AM/FM/ΦM/pulse modulation with adjustable depth/deviation | Simulate voice signals (AM 30% depth), data pulses (1kHz pulse), verify demodulation fidelity (THD≤3%) |
| Expansion Capability | Options: Dual RF output, narrowband digital modulation (FSK/PSK) | Simulate dual-signal interference, test receiver immunity; support NB-IoT module testing |
Core Application Scenarios
HF Radio Testing — Output 30MHz AM signal (30% depth, 1kHz tone), test sensitivity (-112dBm), modulation depth error ≤2%
Pulse Radar Validation — Pulse modulation (1µs width, 10kHz PRF), 10GHz output, test pulse response (rise time ≤500ns)
NB-IoT FSK Testing — FSK modulation at 433MHz (5kHz deviation, 9600bps), test BER (≤1%@-100dBm)
Scenario Deep Dive
Core Technology Architecture
"High-Purity Frequency Synthesis + Multi-Mode Modulation Engine + Modular Expansion" architecture:
1. RF Synthesis: Low-noise PLL synthesizer (100kHz-6GHz), phase noise ≤-115dBc/Hz@10kHz (1GHz carrier)
2. Modulation Module: Dedicated AM/FM/ΦM/pulse circuits, modulation distortion ≤0.5%
3. Expansion: Dual RF channels (sync error ≤1ppm), narrowband digital modulation (FSK/PSK, ≤100kbps symbol rate)
| Technical Dimension | MG3740A Analog Generator | Digital Signal Generator | Advantage |
|---|---|---|---|
| Analog Modulation Testing | Native AM/FM/ΦM/pulse support, distortion ≤0.5%, AM depth accuracy ±1% | Software-emulated modulation, distortion ≥2%, AM accuracy ±5% | Modulation fidelity error reduced from 5% to 0.5%, THD test repeatability 99.8% |
| Multi-Signal Flexibility | Dual RF option: 2 independent signals (100kHz separation), sync error ≤10ns | Complex waveform stitching required, sync error >1µs | 200% faster dual-signal interference testing (e.g., 60dB adjacent channel rejection test time reduced from 2h to 40min) |
FM Radio Test Workflow
Connection: MG3740A RF output → FM radio (88-108MHz), audio analyzer to headphone output
Configuration:
- Signal: 98MHz, -80dBm output, FM modulation (75kHz deviation, 1kHz tone)
- Measurements: Sensitivity (≤-85dBm), THD (≤3%), deviation tracking (≤5% error)Execution:
- Sensitivity: Clear reception at -87dBm (passes -85dBm requirement)
- THD: Measured 2.1% (passes ≤3%)
- Interference: Add adjacent channel (98.1MHz, -70dBm), verify clear reception (≥60dB rejection)Optimization: If low-band sensitivity fails (-80dBm), adjust input circuit inductance (+5%), retest to -86dBm
Usage Precautions
1. For low-level signals (≤-100dBm): Use low-loss cables (≤0.5dB/m) + power meter calibration to avoid >3dB sensitivity error
2. Match modulation parameters to device standards (e.g., FM broadcast 75kHz deviation, aviation radio ±5kHz)
3. With dual RF: Calibrate power consistency (≤0.5dB error) and frequency separation to prevent intermodulation
