Tektronix 1705A, Instruction Manual

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Operating Instructions
2- 20
1705A Spectrum Monitor
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.