智慧职教: Who transmits and receives signal to and from the satellite using L band frequency?
举一反三
- 智慧职教: The working frequency band for a LES in Inmarsat system is_______band.
- 64. DSC call is only an alerting signal and the communication which follows the call will be madeon the appropriate frequency band using（） A: either RT or NBDP B: either SART or EPIRB C: SART and radar D: DSC and RT
- Which of the following sampling frequency of narrow band signal is correct? A: ωs≥2ωh B: ωs≥2ωl C: [img=462x62]18031bf50efc13b.png[/img] D: [img=461x65]18031bf519538f1.png[/img]
- 163．When using a hand held smoke signal from a lifeboat, you should activate the signal __.
- frequency band