Tektronix 1705A instruction manual Locating Ku- Band Satellites, Basic Operating Procedure

Operating Instructions

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.

Test Mode 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.

Basic Operating

Procedure

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.

1705A Spectrum Monitor 2- 17