Tektronix 1705A - Manual (Page 56)

Operating Instructions
1705A Spectrum Monitor 2- 17
ments the frequency readout (low to high) and moves the brightened portion of
the sweep from left to right. When L.O. Low is selected the readout decrements
(high to low) and the brightened portion of the sweep moves from left to right,
with clockwise rotation of the CENTER FREQUENCY.
When L--Band is selected from the Readout Mode menu, the Main menu returns
and the readout is scaled in MHz. Changes of frequency readout are shown in
ascending order when the front-panel CENTER FREQUENCY control is rotated
clockwise.
Once the satellite frequency and L.O. have been set, pushing the INPUT push
button saves the display and returns the Main menu. Pushing the INPUT push
button again returns to normal monitor operation.
NOTE. The 1705A must be returned to the normal operating routine before the
front-panel push-button switches perform the label functions. Push the INPUT
push-button as many times as required to bring up the spectrum analyzer
display.
The series of tests that can be made are documented in Section 6, Maintenance,
under the sub-section heading of “General Troubleshooting Techniques.”
Locating Ku- Band Satellites
The TEKTRONIX 1705A Spectrum Monitor is specifically designed to help the
television news vehicle operator quickly and properly address a satellite. Even
though the 1705A will be most often used for Ku--Band transmissions, it can be
used with any satellite system that can be downconverted to its L--Band input
frequencies.
The following operating procedure is typical and can be adjusted to fit particular
vehicle and operator preferences.
1. The expected true azimuth and elevation to the satellite from a specific
location should be determined by calculation or reference to Table 2--3 for
popular news satellites. Table 2--3 lists 21 Continental United States
(CONUS) cities; the cities in the table are spotted around the country and
can help to approximate (the location of a satellite) from any area of the 48
contiguous states.
Test Mode
Basic Operating
Procedure