PNA Series network analyzers require firmware revision 2.5 or higher.
PNA系列网络分析仪需要固件版本2.5或更高。
Typical RF & uW instruments: signal generators, spectrum analyzers, network analyzers, power meters, receivers and so on;
典型的射频微波类测试仪表：信号源、频谱分析仪、网络分析仪、功率计、接收机等等；
While the bulk of this chapter focuses on profiling tools, network analyzers can be highly effective in helping to ensure that scripts and pages are loading and running as quickly as possible.
虽然本章大多数内容关注于性能分析工具，其实网络分析工具可以极大提高分析效率，以确保脚本和页面尽可能快地加载运行。
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