Envelope-to: dave@picks.force9.co.uk
Delivery-date: Fri, 29 Apr 2005 16:46:40 +0100
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Date: Fri, 29 Apr 2005 17:46:34 +0200
From: Wolf DL4YHF <dl4yhf@freenet.de>
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To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: RE: Re: TA APR 28/29
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Hi Dave,

> One thing I find a bit awkward about Wolf on an overnight run 
> is finding out when the periods of good reception were. 
> I suppose you can count up lines from when you started
> but is there another way?

If it sounds more convenient, I can replace the "t:" indicator with the current time of day. A the moment, "t:"-value has to be added to the time when the WOLF decoder was started (which is shown in the decoder window before WOLF command line). For example, for "t:2592" add 2592 seconds (= 42.2 minutes) to 01:52:03 in John's capture. The result is something like 02:35 as timestamp for the first successful decode. However this doesn't mean John would have had immediate copy at 02:35 if he had turned the decoder on at 02:30, because WOLF has integrated the signal over a longer timer. For that reason (or, from a technical point of view) it's important to know that first successful decode was 2592 seconds after the decoder started.

Besides this: There is a minor bug in the date-display, it starts counting the months at zero. So the date "2005-03-29" (in ISO-8601 format) should read "2005-04-29". Will be fixed in the next release. 

We may also start thinking about a WOLF 2-way QSO procedure: which station should transmit in which time slot, and how long the time slots should be (my suggestion: 15 or 30 minutes). In the next release, there will be a "QSO mode" which automatically toggles between RX and TX, synchronized with the PC's clock.

Best regards, and good luck. Hope to work you *in any mode* later this weekend !

 Wolf DL4YHF 


Dave Pick schrieb:

>Thanks John.
>
>I've received you and you've received me.. We can claim a QSO! ;-) (sorry
>Mal)
>
>The transmit Wolf comes from a different PC and I set that up by generating
>1000Hz tone which I measured accurately, first with a frequency meter and
>then by listening to the 50th harmonic! (Diode across the audio)
>This one needed less correction, 8004 I think..
>I then calibrated the receive PC by feeding the 1kHz straight in.
>
>Thanks also to Marcus for explaining the numbers a bit more. I guess the
>f:0.020 means my TX calibration agrees with John's receiver pretty well?
>The TX exciter is a Racal MA1723 with an ovened oscillator so it should be
>pretty good.
>
>One thing I find a bit awkward about Wolf on an overnight run is finding out
>when the periods of good reception were. I suppose you can count up lines
>from when you started but is there another way?
>
>73
>Dave G3YXM.
>
>-----Original Message-----
>From: owner-rsgb_lf_group@blacksheep.org
>[mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of John Andrews
>Sent: 29 April 2005 11:03
>To: rsgb_lf_group@blacksheep.org
>Subject: LF: Re: TA APR 28/29
>
>Dave,
>
>I did a little better, and congratulations! Copy is shown below. There were
>a number of instances of  the "0.020" frequency offset during the night,
>some in long strings, but this was the only instance of correct decoding.
>
>Question: Have you set the sampling rate for transmitting? I see that you
>were using 8020 Hz on the receive copy you sent me the other day.
>
>John Andrews, W1TAG/WD2XES
>--------------------------------------------------------
>2005-03-29 01:52:03 >WOLF  -r 8001.7083 -f 800.09 -t 0.1 -w 0.0000
>t:  24 f:-0.009 a:-0.7 dp: 98.3 ci: 6 cj:168 JQF2ZJFV*J*5YGV ?
>t:  48 f:-0.101 a:-0.3 dp: 95.8 ci:11 cj:467 O2M3Q5/8/WGMBDJ ?
>t:  96 f:-0.074 a:-1.3 dp: 93.9 ci: 9 cj:100 AB756APG02HRHGO ?
>t: 192 f:-0.098 pm:178.2 jm:743 q:-14.8 -8.3 RB/224 3JEHT85Q ?
>t: 288 f: 0.078 pm:181.0 jm:818 q:-11.7 -8.2 *CQ91NQSC755GWJ ?
>t: 384 f:-0.098 pm:192.1 jm:743 q:-11.4 -7.8 PQWENXDX*LAPIIG ?
>t: 480 f:-0.098 pm:216.5 jm:743 q:-10.8 -7.9  YMIL44 KV X6JS ?
>t: 576 f:-0.098 pm:241.7 jm:743 q: -9.9 -7.9  X*DZFAK87YZFWA ?
>t: 672 f:-0.098 pm:248.2 jm:743 q: -9.2 -7.8 2FKTUTTYJ3J2Q.M ?
>t: 768 f:-0.098 pm:285.7 jm:743 q: -8.9 -8.2 70P56CZVRCLUUHK ?
>t: 864 f:-0.098 pm:295.6 jm:743 q: -8.0 -8.3 18HGZ5HXBL0WIXV ?
>t: 960 f:-0.098 pm:317.0 jm:743 q: -7.1 -7.4 /J*OQYU7T853MKL ?
>t:1056 f:-0.098 pm:320.5 jm:743 q: -6.9 -5.7 .75I3J3ET853MKL -
>t:1152 f:-0.098 pm:321.7 jm:743 q: -6.2 -5.8 EL4KELWR2E23HR4 -
>t:1248 f:-0.098 pm:352.3 jm:743 q: -6.1 -5.3 EL4KELWR2E23HR4 -
>t:1344 f:-0.098 pm:354.5 jm:743 q: -5.7 -5.7 EL4KELWR2E23HR4 - t:1440
>f:-0.098 pm:358.2 jm:743 q: -5.3 -5.9 EL4KELWR2E23HR4 -
>t:1536 f:-0.098 pm:362.9 jm:743 q: -4.9 -8.3 EL4KEJEUG*S2F3Y ?
>t:1632 f: 0.020 pm:478.0 jm:139 q: -1.9 -7.6 EA6I ZVPFKILJH2 ?
>t:1728 f: 0.020 pm:501.7 jm:139 q: -1.6 -8.5 C3G???R9PA.J4W1 ?
>t:1824 f: 0.020 pm:515.3 jm:139 q: -1.3 -8.0 DUJ/VWQ758T9K63 ?
>t:1920 f: 0.020 pm:534.3 jm:139 q: -1.0 -7.1 EA6I ZVPFKJOXG5 ?
>t:2016 f: 0.020 pm:541.8 jm:139 q: -0.7-10.2 G2BZXFO2AX3D.SI ?
>t:2112 f: 0.020 pm:556.3 jm:139 q: -0.3-10.5 G2BZXFO2AX3D.SI ?
>t:2208 f: 0.020 pm:573.4 jm:139 q: -0.3-10.0 G2BZXFO2AX3D.SI ?
>t:2304 f: 0.020 pm:600.2 jm:139 q: -0.1 -6.0 J0*8B O2AX3D.SI - t:2400 f:
>0.020 pm:610.1 jm:139 q: -0.0 -8.0 J0*8DTV/BS8A0 C ?
>t:2496 f: 0.020 pm:618.3 jm:139 q:  0.1 -8.7 K3YI ZVPFJ/9Y.X ?
>t:2592 f: 0.020 pm:655.5 jm:140 q: -0.0 -5.6 G3YXM 300W WOLF -
>t:2688 f: 0.020 pm:671.8 jm:140 q:  0.1 -5.7 G3YXM 300W WOLF -
>t:2784 f: 0.020 pm:708.6 jm:140 q:  0.3 -5.5 G3YXM 300W WOLF - t:2880 f:
>0.020 pm:729.5 jm:140 q:  0.3 -5.1 G3YXM 300W WOLF -
>t:2976 f: 0.020 pm:753.6 jm:140 q:  0.2 -5.4 G3YXM 300W WOLF -
>t:3072 f: 0.020 pm:766.3 jm:140 q:  0.3 -5.1 G3YXM 300W WOLF -
>t:3168 f: 0.020 pm:768.9 jm:140 q:  0.3 -5.3 G3YXM 300W WOLF -
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