Hi Enzo, Yes the 1.2 Ghz uplink does work on the BBS. How many watts are at your antenna and what is the antenna gain? I find that 30W at my 20+dB gain antenna is not enough unless the view is clear of any trees.
I find the 1.2GHz uplink to be difficult on the BBS so keep trying!
Current logs show several users from around the world. JA, VK, OZ, WA stations are some examples.
There is no other bird to test with.
73, Mark N8MH ------Original Message------ From: Vincenzo Mone Sender: amsat-bb-bounces@amsat.org To: Amsat - BBs Subject: [amsat-bb] AO-51 on mode V/U BBS Sent: Jan 24, 2010 9:31 AM
Hi Folks, I am trying the bird on: 9k6 BBS and Telemetry. Does it work? With the MSPE I can just receive numbers like: B:45225614. What does it mean? I am trying to request the DIR on 1268.700 MHz, but I do not get any response. I am asking because I would like to see if my system works. Is there any other Bird that I can use the 1.2 GHz Band? Thanks in advance.
73 de Enzo IK8OZV EasyLog 5 BetaTester EasyLog PDA BetaTester WinBollet BetaTester D.C.I. CheckPoint Regione Campania Skype: ik8ozv8520
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Hi Enzo,
As Mark has pointed out, you need a fair ERP to get in to the mode L receiver. I have about 2500 ERP, and can get in fairly reliably with no trees in the way, but not as well as I did back in the KO-23 days. Because of antenna placement (?) it sometimes makes a big difference whether the satellite is approaching or leaving, both on packet and mode L voice.
Two things to check are your frequency and calibration, and your deviation. Not all rigs, and especially transverters, are accurately calibrated at that frequency. Mine are not, and I used a laboratory grade frequency counter to get the correct values.
Also, there is a consensus that the actually uplink frequency is about 3 KHz higher than published. I use 1268.703 MHz. The receiver is fairly wide, but every bit helps.
Finally, make certain the 9600 baud deviation is good, preferably with a good deviation meter.
Good luck,
Alan WA4SCA
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Alan P. Biddle -
marklhammond＠gmail.com