GSM、GPRS、Bluetooth、W-CDMA--------------------
Product： Universal Radio Communication Tester
Sort： R&S
Model： CMU200
Features：
Rohde & Schwarz has announced that its CMU200 universal radio communication tester now supports Enhanced Variable Rate Codec (EVRC-B) functionality, which will soon be incorporated in CDMA2000 wireless networks. EVRC-B gives wireless service providers the ability to dynamically adjust voice capacity on their network according to traffic conditions. The capability is provided free of charge to R&S CMU200 owners as a downloadable firmware upgrade.
CDMA2000 wireless networks generally use the EVRC speech coder/decoder (codec) today. When introduced more than a decade ago, it dramatically improved speech quality, especially at lower data rates, over the previous codec. EVRC compresses each 20ms of 8kHz sampled speech and outputs full-rate, half-rate, quarter-rate and eighth-rate frames. EVRC-B, developed by QUALCOMM Inc. as Fourth Generation Vocoder (4GV), is the successor to EVRC that will soon be deployed in CDMA2000 networks. EVRC-B utilizes more efficient compression algorithms and allows selection of different operating points within the codec. This gives wireless service providers the ability to vary the operation of the codec to make trade-offs between network capacity and voice quality on a dynamic basis.
Product： Universal Radio Communication Tester
Sort： R&S
Model： CMU200
Features：
Rohde & Schwarz has announced that its CMU200 universal radio communication tester now supports Enhanced Variable Rate Codec (EVRC-B) functionality, which will soon be incorporated in CDMA2000 wireless networks. EVRC-B gives wireless service providers the ability to dynamically adjust voice capacity on their network according to traffic conditions. The capability is provided free of charge to R&S CMU200 owners as a downloadable firmware upgrade.
CDMA2000 wireless networks generally use the EVRC speech coder/decoder (codec) today. When introduced more than a decade ago, it dramatically improved speech quality, especially at lower data rates, over the previous codec. EVRC compresses each 20ms of 8kHz sampled speech and outputs full-rate, half-rate, quarter-rate and eighth-rate frames. EVRC-B, developed by QUALCOMM Inc. as Fourth Generation Vocoder (4GV), is the successor to EVRC that will soon be deployed in CDMA2000 networks. EVRC-B utilizes more efficient compression algorithms and allows selection of different operating points within the codec. This gives wireless service providers the ability to vary the operation of the codec to make trade-offs between network capacity and voice quality on a dynamic basis.
Specifications
- used
- it is used instrument, not new
Features
- still in good condition
- The R&S CMU200 universal radio communication tester is a comprehensive instrument that performs a wide array of tests that let manufacturers measure the performance of their products in accordance with wireless standards.
Main Products
used electronic instruments,refurbished electronic equipments