* @return boolean 不管wifi,还是mobile net,只有当前在连接状态(可有效传输数据)才返回true,反之false。 */ public static boolean isConnected(Context context) { NetworkInfo net = getConnectivityManager(context).getActiveNetworkInfo(); return net != null && net.isConnected(); } /** * 判断有无网络正...
1 23 4 10 9 Figure 2- 1: Front panel 87 65 2- 2 RSA3408B Analyzer User Manual Interface Maps Front-Panel Interface 1. Display. LCD (Liquid Crystal Display). Size: 21.3 cm (8.4 inch) Resolution: 800 × 600 dots Color: 256 colors maximum 2. Side Keys. Select menu items associated...
–150 10 kHz –87.5 fVCO = 3.9 GHz 100 kHz 1 MHz –111 –131.5 10 MHz –150 10 kHz –86.5 fVCO = 4.4 GHz 100 kHz 1 MHz –111 –131 PNVCO Open loop VCO phase noise 10 MHz 10 kHz –150 –85 fVCO = 4.9 GHz 100 kHz 1 MHz –110 –130.5 10 MHz –149.5 10 kHz –84.5 ...
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–150 10 kHz –87.5 fVCO = 3.9 GHz 100 kHz 1 MHz –111 –131.5 10 MHz –150 10 kHz –86.5 fVCO = 4.4 GHz 100 kHz 1 MHz –111 –131 PNVCO Open loop VCO phase noise 10 MHz 10 kHz –150 –85 fVCO = 4.9 GHz 100 kHz 1 MHz –110 –130.5 10 MHz –149.5 10 kHz –84.5 ...