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ZL3AI > APRDIG 08.03.04 12:47l 42 Lines 1252 Bytes #999 (0) @ WW
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Subj: TAPR Digest, Mar 06, 4/4
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: Re: D-Star ICOM network
From: Rich Osman <Rich@osman.com>
Date: Sat, 06 Mar 2004 22:26:27 -0600
X-Message-Number: 28
Not vaporware, there's a repeater on in Dallas.
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Subject: Re: TNC-2 and MFJ-1270 performance
From: Bruce & Leigh Coates <Bruce.Coates@Sasktel.Net>
Date: Sat, 06 Mar 2004 22:44:05 -0600
X-Message-Number: 29
Hi Mark.
I used your pre-emphasized audio clip and fed it through my HP 8654B signal
generator. The resulting signal was fed into a Motorola MCX-100 radio. I
then tested two MFJ-1274's, one Kantronics KPC2 and two Paccomm Tiny-2's.
The odd thing is that they all were very close to the same when it came to
decoding a noisy signals. The results I got were:
Tiny-2 - 0.4-0.5uV
KPC2 - 0.4-0.5uV
MFJ - 0.5 - 0.6 uV
In all cases the audio from the radio had a noticeable amount of background
noise at the point where the TNC's began to miss packets. The signal
approaches full quieting at about 1 uV on this radio.
To be honest I expected the MFJ to fair much worse that it did. I'm not
sure why my results are so different from those of others though.
73 - Bruce, VE5BNC
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