填空题
A——inspect the antenna K——relative humidity
B——audio-visual signal L——technical features
C——indication of monitoring meters M——frequency range
D——satellite receiver system N——frequency stability
E——video recorder & television camera O ——output resistance,
F——TV signal coverage P——continuous operating time
G——transmitting antenna Q——main technical parameters
H——apply solid state circuits R——installation and operation
I——convenient to transport
S——common problems and simple maintenance
J——operating procedure for switching on/off
T——circuit diagram for the transmitter