Hugo, you wrote, "perform doppler shift by starting 10 kHz below and work your way up", but this should not be generalized because the Doppler correction is opposite for the Receiver and the Transmitter.

(1) At the Receiver - - when the transmitter (bird) is coming towards you, its frequency appears higher than its real frequency - when the transmitter (bird) is going away from you, its frequency appears lower than its real frequency (2) So, ideally, the Transmitter, has to compensate the opposite way, to be received at the correct frequency.

(3) But since the satellite does not use Doppler corrections, the ground station has to provide the correction for both RX as well as TX.

If you like, you can read the amazing article "The One True Rule For Doppler Correction", published by AMSAT in 1994.  The key words are "AT THE SATELLITE".  Also, just watch the frequencies shown by any satellite tracking program like SatPC32 or HRD Sat Tracker, and you'll see what is really going on.  Happy bird hunting...!

73!  Umesh, K6VUG

------------------------------

Message: 4 Date: Wed, 6 Jun 2018 21:50:20 -0700 From: "Hugo Dominguez, Jr." hugois@gmail.com To: Daniel Wight kd7lee@gmail.com Cc: amsat-bb@amsat.org Subject: Re: [amsat-bb] Unsuccessful Uplinks - AO-92 Message-ID: 00C95211-D98E-4656-A393-D425DA744CF2@gmail.com Content-Type: text/plain;    charset=utf-8

Thanks. All the web pages I read said to perform doppler shift by starting 10 kHz below and work your way up. Even this amsat website has instructions to do it how I am doing it: https://amsat-uk.org/2018/01/26/ao-92-open-for-amateur-radio-use/

I also just noticed that there is a schedule for the L-band for uplink which i?m interpreting that UHF won?t work when the bird is setup for the L-band for uplink. Maybe I was trying to make contact when it was on the L band.

? Hugo Dominguez, Jr.