[amsat-bb] First Demo of ground-based LEILA-2 for the NB transponder

George Henry ka3hsw at att.net
Mon Jun 27 00:02:20 UTC 2016

There were more than a few stations that could have benefitted from that on 
Field Day...  heard AO-7 jump to mode A twice from being hammered too hard.

George, KA3HSW

----- Original Message ----- 
From: "Peter Guelzow" <peter.guelzow at kourou.de>
To: "amsat forum" <forum at amsat-dl.org>; "AMSAT-BB" <AMSAT-BB at amsat.org>
Sent: Sunday, June 26, 2016 5:43 AM
Subject: [amsat-bb] First Demo of ground-based LEILA-2 for the NB 

> First Demo of ground-based LEILA-2 for the NB transponder
> ====================================================
> the first geostationary P4-A satellite Es'hail-2 will carry two amateur
> radio transponders:
> - a Narrowband (NB) transponder with 250 kHz bandwidth and
> - a Wideband   (WB) transponder with 8 MHz bandwidth for Digital Amateur
> Television (DATV, DVB-S2 standard)
> The NB transponder is a bent-pipe, non-inverting, linear transponder
> with AGC.
> A LEILA-2 system, similar to LEILA flown on AMSAT OSCAR-40 (P3-D) will
> be used for Traffic Control and Telemetry Beacons.
> The mayor difference is, that this is a ground-based system which will
> be installed at the Es'hailSat Satellite Control Center (SCC) near Doha
> in Qatar.
> LEILA-2 will analyze the downlink power levels in the passband of the
> NB-transponder and automatically generate a Siren to remark users to
> decrease their uplink power.
> LEILA-2 is a joint development of AMSAT-DL's Achim Vollhardt DH2VA and
> AMSAT-UK's Howard Long G6LVB.
> LEILA is an german acronym for "LEIstungs Limit Anzeige", which means:
> Power Limit Indicator
> The following video gives a first insight to the Es'hail-2 LEILA-2
> hardware concept: https://youtu.be/v-9jVw-pK0A
> 73s  Peter DB2OS, AMSAT-DL
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