Tektronix 1705A instruction manual Operating Instructions

Operating Instructions

systems are single polarization receive to avoid the possibility of nulling the wrong polarization. If the antenna is set up to receive more than one polarization, be sure that the feed polarization being observed is associated with the transponder that will be used for the transmission.

10.Before transmitting, the satellite operator will need to be contacted. The operator will want a transmit signal to be brought up to verify correct transponder, signal polarization, and to determine the correct operating power. If the antenna and transmitting system are correctly adjusted, this check will only take seconds. This check may be permitted earlier in the day, if time is available and the antenna or transmitter setting are not to be changed.

11.During transmit, the 1705A may be used to verify the presence of video, audio, and any communications signals at the 70 MHz output of the Video Exciter. This signal may be permanently connected to the 1705A, along with the L-Band receive connection, to allow front-panel selection. With either input, narrower spans may be selected to permit observing discrete signals.

12.Be sure that there is an agreed upon “good night” for the transmission. The carrier will not be watching your program content, and must know clearly when you are finished with the satellite. Unless there is a specific agree- ment, the carrier will expect a telephone call to know you are clear, and you will be charged.

2- 20 1705A Spectrum Monitor