The MG3681A uses a wideband vector modulator to output the high-accuracy, high-speed vector modulation signals that are required for R&D and manufacturing of digital mobile communications equipment and related devices. It covers, the frequency band of leading mobile communications systems for the frequency range of 250 kHz to 3 GHz.
It uses vector modulator to provide excellent frequency response, distortion and S/N ratio. It can perform accurate receiver sensitivity test and transmitter adjacent channel leakage power test for high-speed modulation communications systems.
Expansion units such as MU368040A CDMA Modulation Unit for modulation signals generation of W-CDMA communication system can be installed on the seven expansion slots in the MG3681A. Various modulation signals can be generated with the expansion units and associated software.
The MG3681A also has analog modulation functions such as AM and FM for testing of analog communications systems. In addition, its excellent signal purity and various functions such as memory and frequency sweep are useful as a general-purpose signal generator.
The frequency response is excellent by calibrating output level across the entire output RF frequency range. Even low level can be output with high-accuracy due to use of a high-precision, high-reliability step attenuator calibrated.
Digital mobile communications evolve into wideband RF frequency bandwidth, and signal generator requires lownoise signal to faraway frequency offset. A unique synthesizer technology achieves low noise floor characteristics of –145 dBc/Hz (typ. at above 5 MHz offset).
The modulation frequency response of ±3 dB at the
modulation frequency from DC to 30 MHz is achievable by the high-speed baseband signal processor and wideband vector modulator, permitting wideband vector modulation supporting high-speed data communications including WCDMA system. Accurate wideband vector modulation is also available by using the external I/Q signals as well as internal modulation using the optional modulation units installed. In addition, a unique Automatic Level Control (ALC) technology assures stable output level at vector modulation.
Anritsu MG3681A Applications:
- Evaluation of W-CDMA/HSDPA systems (Uplink and Downlink)
- Multiplex up to 12 channels
- Test Model Patterns included for rapid testing
- Internally generate various channel formats for base station emulation
- Use HSDPA IQproducer™ to generate standard compliant signals and error cases
- AWGN
- Add AWGN to any signal
- Satisfy requirements for dynamic range and interference testing specified by 3GPP and 3GPP2
- Evaluation of CDMA2000 1xEV-DO systems
- Create and edit waveforms using IQproducer™ for EV-DO
