[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

RE: TH-D7 Programming



I've had good results my THD7G on AO51 and SO50 using the technique outlined
by AJ3U in an Amsat-bb posting several month ago.

AJ3U's posting on the subject:
 >I use two memory slots for each satellite.  One for
 >the uplink, one for the downlink.  When I want to
 >work a bird, I copy the downlink memory slot into
 >the VFO (F -> VFO) so that I can change it to adjust
 >for doppler.  I do not change the uplink frequency
 >like Bob said since the 2m uplink doesn't have
 >much of a doppler shift.  The 440 downlink is what
 >you need to worry about.
 >
 >73!
 >
 >A.J. Farmer, AJ3U
 >http://www.aj3u.com
 >

-----Original Message-----
From: owner-AMSAT-BB@amsat.org [mailto:owner-AMSAT-BB@amsat.org]On
Behalf Of Jim Walls
Sent: Sunday, March 06, 2005 21:20 UTC
To: Jim Jerzycke; Amsat-BB
Subject: Re: [amsat-bb] TH-D7 Programming


Jim Jerzycke wrote:

> Good day, all
> I must be *really* dense, because I just can't figure
> out how to get the transmit and receive freqs for Echo
> stored in my TH-D7 in a way that appears usable to me.
> I can store the receive freqs (group of 5 channels,
> 5kHz apart), and name them, but can't seem to figure
> out how to keep the transmit on 145.920 while tuning
> between the receive frequencies. The manual is just
> about useless for explaining sat ops, or how to keep
> the transmit on a single frequency while tuning among
> a group of stored freqs _on different bands_.

The manual does not explain satellite ops because essentially it wont do
it.  Actually you can (and people have), but it will only sort of
operate satellite.  There is no way to set a memory channel for transmit
on one band and receive on the other.  You can set transmit frequencies
in one set of memories and receive frequencies in another set of memores
and then transmit on one band and receive on the other.  For example set
up the radio as follows:
Program 5 channels with downlink frequency (with various doppler
corrections) and a 6th channel with the uplink.  So for example, use
these channels:
300  145.920 67Hz PL  Echo up
301  435.290          Echo Dn1
302  435.295          Echo Dn2
303  435.300          Echo Dn3
304  435.305          Echo Dn4
305  435.310          Echo Dn5

Set the radio to the "A" band and select channel 301.  Then set the
radio to the "B" band and select channel 300.  As doppler changes,
switch bands, change the channel and switch back.  Rather cumbesome, but
possible.


--
73
-------------------------------------
Jim Walls - K6CCC
k6ccc@amsat.org
Ofc:  818-548-4804
http://home.earthlink.net/~k6ccc
AMSAT Member 32537 - WSWSS Member 395
----
Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
----
Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org



AMSAT Top AMSAT Home