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161. Re: [RTTY] FSK and CAT via 1 serial port (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Wed, 27 Apr 2011 14:04:00 -0400
Yes. you will need to use two serial ports if you want to use FSK. Even if you could use DTR for FSK and RTS for PTT (for example with EXTFSK), there is no operating system that will allow two progr
/archives//html/RTTY/2011-04/msg00136.html (8,175 bytes)

162. Re: [RTTY] SPOT:SV2ASP/A 18.107.6 RTTY (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Fri, 29 Apr 2011 14:51:34 -0400
AMTOR or not, the PK-232 was designed primarily for HF Packet and uses 200 Hz shift for both transmit and receive on HF. The modem is a typical 1980's filter/slicer for receive (multiple stages of op
/archives//html/RTTY/2011-04/msg00154.html (8,849 bytes)

163. Re: [RTTY] Tips needed for 75 Baud RTTY w/N1MM Logger & K3 (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Thu, 02 Jun 2011 09:17:29 -0400
Not much to do ... In the N1MM "Digital Interface" open the MMTTY Configuration dialog -> Select the "Decode" tab and set BaudRate to 75 Baud. Then select the "Demodulator" tab and *uncheck* the "Fix
/archives//html/RTTY/2011-06/msg00001.html (8,035 bytes)

164. Re: [RTTY] Tips needed for 75 Baud RTTY w/N1MM Logger & K3 (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Thu, 02 Jun 2011 12:32:31 -0400
This is unnecessarily complex and limits the ability to use AFC when running - particularly since the current public version of MMTTY allows the user to choose *not* to reset to 45.45 baud simply by
/archives//html/RTTY/2011-06/msg00003.html (8,478 bytes)

165. Re: [RTTY] Checking Sound Card performance on RTTY with Audio Analyzer (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Thu, 02 Jun 2011 21:32:22 -0400
Your signal to noise ratio is not 26 dB ... it is 56 dB ("S9" audio level minus no input noise level) but you're not using the entire dynamic range (noise floor to clipping) of the sound card. 56 dB
/archives//html/RTTY/2011-06/msg00006.html (9,471 bytes)

166. Re: [RTTY] 300 baud RTTY (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 06 Jun 2011 16:50:45 -0400
In addition, USB has a 1 ms resolution +/- some jitter. As the data rate approaches 100 baud, USB errors start to become significant. Interestingly, if one goes to a 7 bit code (ASCII) and 300 baud
/archives//html/RTTY/2011-06/msg00038.html (8,729 bytes)

167. Re: [RTTY] Mark & Space - High Tones (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Wed, 08 Jun 2011 15:22:40 -0400
You are correct. MARK is the tone that provides the *HIGHER* RF frequency. Thus if you use USB AFSK the conventional "High tones" would be 2295 Hz = Mark and 2125 = Space. Nearly all material on RTT
/archives//html/RTTY/2011-06/msg00053.html (8,425 bytes)

168. Re: [RTTY] Mark & Space - High Tones (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Wed, 08 Jun 2011 18:40:50 -0400
That is *incorrect* ... if one connects a frequency counter to the output of the transmitter, MARK is always the *higher* of the two measured frequencies - regardless of whether the suppressed carri
/archives//html/RTTY/2011-06/msg00056.html (9,983 bytes)

169. Re: [RTTY] Mark & Space - High Tones (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Wed, 08 Jun 2011 23:31:44 -0400
Actually "low tones" were 1275/1445 ... more common in Europe than in the US. 915/1085 (centered on 1000 Hz) is another artifact of modern programmers who did not understand RTTY and were used to 1 K
/archives//html/RTTY/2011-06/msg00064.html (12,888 bytes)

170. Re: [RTTY] Shift 170 -vs- 200 (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Thu, 09 Jun 2011 08:51:26 -0400
Because some of the early "multi-mode" hardware boxes were designed around TI modem chips that implemented the Bell 103 standard with a fixed 200 Hz shift. The marketing departments of the manufactu
/archives//html/RTTY/2011-06/msg00070.html (9,108 bytes)

171. Re: [RTTY] Shift 170 -vs- 200 (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Thu, 09 Jun 2011 12:03:17 -0400
That's probably true ... all of the 200 Hz TNCs included HF (and VHF) packet. That's probably true as well ... but the 200 Hz transmission certainly did not help with the ability to be heard due to
/archives//html/RTTY/2011-06/msg00072.html (13,956 bytes)

172. Re: [RTTY] rtty right freq (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sat, 11 Jun 2011 01:42:49 -0400
If the RTTY signal has a RF mark frequency of 14.090 MHz (display on FT-1000MP in RTTY), and the other station is using AFSK with "high tones" (2125/2295) if the AFSK is LSB the "dial" frequency will
/archives//html/RTTY/2011-06/msg00101.html (8,479 bytes)

173. Re: [RTTY] USB-Serial (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 13 Jun 2011 14:59:21 -0400
You need to be careful with the Edgeport devices. New, they are very expensive but they can be found from reputable resellers/recyclers at very good prices (I have seen the four port boxes for less
/archives//html/RTTY/2011-06/msg00124.html (13,485 bytes)

174. Re: [RTTY] USB-Serial (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 13 Jun 2011 15:05:03 -0400
*Be careful!* There *is* a compatibility problem with Prolific USB to serial converters and programs written in VB6 when used for CAT (serial) rig control - at least with some versions of the Prolif
/archives//html/RTTY/2011-06/msg00125.html (12,826 bytes)

175. Re: [RTTY] microHAM & Kenwood TS-450s (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sat, 09 Jul 2011 11:15:16 -0400
David, Make sure you are using RTTY mode in the TS-450 and have not engaged "REV" on the rig (pg 38, TS-450S/TS-690S Instruction Manual). Also, make sure that the start-up menu item 38 is set to ON (
/archives//html/RTTY/2011-07/msg00034.html (10,125 bytes)

176. Re: [RTTY] microHAM & Kenwood TS-450s (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sat, 09 Jul 2011 11:39:17 -0400
If this is true (and I have no reason to doubt Tom), it is another case in which a Kenwood manual provides incorrect information about the operation of the radio. The Kenwood manual states that "ON"
/archives//html/RTTY/2011-07/msg00035.html (9,409 bytes)

177. Re: [RTTY] RESULTS: 6 is open in US - 50.3 Mhz now (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 12 Jul 2011 23:35:01 -0400
Don, It was something weird ... you went from booming to a whisper and a couple minutes later you were booming again when you worked K3WC. Of course six has been that way all evening signals have bee
/archives//html/RTTY/2011-07/msg00074.html (8,930 bytes)

178. Re: [RTTY] Any Software for an HD-3030 (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sun, 17 Jul 2011 13:35:07 -0400
The HD-3030 was of the generation previous to the "terminal node controller" (PK-232/KAM/etc.) class of devices. It is an old style filter/slicer terminal unit and has no "smarts" or code conversion
/archives//html/RTTY/2011-07/msg00149.html (10,375 bytes)

179. Re: [RTTY] [3830] NAQP RTTY AA5AU Single Op LP (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sun, 17 Jul 2011 15:57:08 -0400
In the Windows world, Microsoft's Consolas font (typeface) works very well. It is a monospaced, slashed zero typeface perfect for use with logging software and digital programs. Look carefully, as y
/archives//html/RTTY/2011-07/msg00159.html (12,148 bytes)

180. Re: [RTTY] Question? (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 18 Jul 2011 01:06:01 -0400
Windows 7 and Vista have another "gotcha" for MMTTY users. The default sample rate for most sound card drivers is now 48 KHz. Since Window 7 and Vista directly control the sound card and isolate the
/archives//html/RTTY/2011-07/msg00178.html (11,184 bytes)

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