Sample Kenwood TM-V71A Chirp Satellite Programming File

Kenwood_TM-V71_Sample_Satellite_Chirp_File.csv

This Chirp file shows how memories in your rig can be used to simplify Doppler shift management. When using memories, you eliminate the need to track the direction of the Doppler shifts. Instead, you track where in the pass you are -- at acquisition, between acquisition and the midpoint, at the midpoint, between the midpoint and satellite loss, and at satellite loss -- with transmit uplink frequencies stored in one memory bank and receive downlink frequencies stored in another memory bank. A common nomenclature can then be used.

In this example Chirp file, transmit uplink frequencies are in the 800 bank and receive downlink frequencies are in the 900 bank. My naming convention first shows the satellite designator followed by one of these codes:

• 'A': The channel to use when first acquiring the satellite.
• 'AM': The channel to use between acquisition & midpoint 'AM' memories are only needed on 70cm and will be 5 kHz BELOW for transmit uplink and 5 kHz ABOVE ).
• 'M': The channel to use when the satellite is at the midpoint of its pass and thus closest to you. Since there is zero relative motion at this point, the is the frequency without Doppler correction.
• 'ML': The channel to use between midpoint and loss (only needed on 70cm).
• 'L': The channel to use when the satellite is about to set and be lost.

This table shows the amount of offset applied for each code on 2-meters and 70-cm for the transmit uplink and the receive downlink: