[digitalradio] Re: Viewing Modulation with Oscilloscope
Hi, Rick. I just joined this group and did a search on Pegasus and found your post. What a coincidence that I was perusing the bands with Multipsk and found you in a QSO with NU4M using MFSK16! I just bought my Peg a couple weeks ago and it has taken over my life. I was looking for software that would let me key the rig via software and I think you gave me the anwer here with the mention of the DX Lab Suite. I looked at Commander but it seemed to be saying that I had to be running other control software like TenTec's or N4PY's to work with it. That's OK I have both of those. So I'll go back to that and see if it will send key down/up commands to the Peg from Multipsk. Anyway thanks for the tips on the software and the ALC. I was using the same method of tuning up with another rig, my FT-767GX and thought the signal sounded clean even tho I was getting the light. Hope to read you on 10.136 agn, maybe you'll be able to hear me too, I'm pretty antenna challenged here on the 5th floor of my apartment building. I went out at midnite and dropped a 35ft length of magnet wire out the window and tied it to a small tree with a piece of plastic fishing line. Works better than anything I had tried inside the apartment. Tunes from 10 to 40 meters. But a good stiff breeze might snap it any time and I'll have to make another midnite run. Oh well I've got 500ft of the magnet wire. 73's Ed - N2JLI --- In digitalradio@yahoogroups.com, KV9U [EMAIL PROTECTED] wrote: I wonder if other hams do what I do in order to roughly determine if you are sending a clean digital signal, with proper settings on the rig and/or the sound card. I use another rig to monitior the modulation here in the shack with no antenna connected on that rig. If you turn everything down and then slowly increase drive levels it seems to me that I can easily hear if things are starting to get more distorted. Usually I run fairly low power where it is just starting to drive the rig and produce some output that I can hear on the monitor rig. On my ICOM 756 Pro II, I have found that even if I have the RF power set to minimum, which is considered to be 5 watts, and with the sliders on the sound card to a fairly low 1 1/2 on the master and wave outputs, I will not see any power output on the LCD bargraph unless I turn up the rig's RF power control. But even with a minimum I can often work stations who say my signal is reasibably strong with good IMD. But at that point it is barely copyable on the monitoring rig so I may only be running a watt or two. If I run the RF power all the way to 100%, the output goes just past 50% so is probably pushing things a bit too much and I keep it well back from there. I do not trigger any ALC under those conditions and have to increase sound card output to make the ALC start to indicate. If I run the ALC beyond the maximum recommendation, you can hear the signal quality change to a distorted pattern quite abruptly. So I normally run things with no ALC indication at all, and that is what I have read is the best procedure. Not all rigs will let you do that. My Ten Tec Pegasus, which works well for digital modes (with the software that supports the Peg such as the DX Lab suite along with MultiPSK that work together), I find that the ALC light always seems to trigger, even with a clean signal. The main thing is to be sure your sound card is set properly, perhaps by monitoring the signal. I am so thankful for the QuickMix applet that lets you nearly instantly switch settings in your sound card for different purposes. Before that I was constantly having to tweak the sound card settings every time I wanted to operate a digital mode. 73, Rick, KV9U Richard wrote: I am interested in verifying that I am not over-driving PSK31. Is there a simple signal conditioning interface to an oscilloscope input? Thanks Rich Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) SPONSORED LINKS Ham radio http://groups.yahoo.com/gads? t=msk=Ham+radiow1=Ham+radiow2=Craft+hobbyw3=Hobby+and+craft+supply w4=Icom+ham+radiow5=Yaesu+ham+radioc=5s=101.sig=NStjWgsFtXmQaGrYd 1LT5w Craft hobby http://groups.yahoo.com/gads? t=msk=Craft+hobbyw1=Ham+radiow2=Craft+hobbyw3=Hobby+and+craft+supp lyw4=Icom+ham+radiow5=Yaesu+ham+radioc=5s=101.sig=RIfve- PXBTtOVJV48uzEVQ Hobby and craft supply http://groups.yahoo.com/gads? t=msk=Hobby+and+craft+supplyw1=Ham+radiow2=Craft+hobbyw3=Hobby+and +craft+supplyw4=Icom+ham+radiow5=Yaesu+ham+radioc=5s=101.sig=Qz1j uq9z5gSL9A5AR8aLNA Icom ham radio http://groups.yahoo.com/gads? t=msk=Icom+ham+radiow1=Ham+radiow2=Craft+hobbyw3=Hobby+and+craft+s
Re: [digitalradio] Re: Viewing Modulation with Oscilloscope
Ed Flaherty wrote: Hi Ed, It is nice to be able to use one basic software package for several rigs. Right now the DX Lab suite seems the best product available for free and probably the best product at any price. The author is amazingly available on the internet unlike the authors of most of the software that you pay money for. PSKMulti works very well with the DX Lab programs, particularly the Commander program and that is true with either the Peg or ICOM rigs. I have an older Kenwood TS440SAT but I never set up any interface for it and consider it mostly a back up rig although I did run AMTOR and later Pactor I with that rig and different hardware interfaces. I only run sound card software now on HF. The one limitation of the Peg is the slow updating of being able to read the frequency in the Commander program. As you probably know, the Peg uses a very crude software register to place and read any data being transferred between the programs. So changing parameters is slow. The ICOM is very rapid and to a human, seems instantaneous. Good luck and hope to see you on the bands sometime. 73, Rick, KV9U Hi, Rick. I just joined this group and did a search on Pegasus and found your post. What a coincidence that I was perusing the bands with Multipsk and found you in a QSO with NU4M using MFSK16! I just bought my Peg a couple weeks ago and it has taken over my life. I was looking for software that would let me key the rig via software and I think you gave me the anwer here with the mention of the DX Lab Suite. I looked at Commander but it seemed to be saying that I had to be running other control software like TenTec's or N4PY's to work with it. That's OK I have both of those. So I'll go back to that and see if it will send key down/up commands to the Peg from Multipsk. Anyway thanks for the tips on the software and the ALC. I was using the same method of tuning up with another rig, my FT-767GX and thought the signal sounded clean even tho I was getting the light. Hope to read you on 10.136 agn, maybe you'll be able to hear me too, I'm pretty antenna challenged here on the 5th floor of my apartment building. I went out at midnite and dropped a 35ft length of magnet wire out the window and tied it to a small tree with a piece of plastic fishing line. Works better than anything I had tried inside the apartment. Tunes from 10 to 40 meters. But a good stiff breeze might snap it any time and I'll have to make another midnite run. Oh well I've got 500ft of the magnet wire. 73's Ed - N2JLI Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) SPONSORED LINKS Ham radio Craft hobby Hobby and craft supply YAHOO! GROUPS LINKS Visit your group "digitalradio" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
RE: [digitalradio] Re: Viewing Modulation with Oscilloscope
I have a metal experimenters case with SO-239 chassis mount connectors on either end. Between the connectors is a solid piece of wire (from coat hanger) soldered in place. Also on the outside of the box is a BNC Connector that has its center terminal going to a 12 length of insulated / flexible wire that is wrapped around the coat-hanger wire and the other end is terminated to the case using a ring terminal. This allows feed-through operation of the unit under test and a pick-up point for frequency, waveform, etc Most of the time, I leave it connected to a wide-range watt meter using a right angle adapter with a double male UHF adapter. You can very the length/wraps of the wire going to the BNC, dependent on what strength signal you want to extract. It may be possible to have a number of BNC connectors, each with a different number wraps for a varied choice of signal strength. David KD4NUE -Original Message- From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Richard Sent: Thursday, January 26, 2006 2:32 AM To: digitalradio@yahoogroups.com Subject: [digitalradio] Re: Viewing Modulation with Oscilloscope Thanks Kev. I happen to have a toroid and some magnet wire. I feed the antenna wire through the torid which has about 30-40 turns on it. It can see the signal fairly well this way. Rich KG6ZTC --- In digitalradio@yahoogroups.com, Kevin der Kinderen [EMAIL PROTECTED] wrote: Rich: I should know the exact answer to this - an RF tap to pull a little power off the transmit sig - but I'm not sure what device to recomment. Have you considered one of the imd meters available? I use the KK7UQ IMD meter but an alternative is the PSKMeter. The KK7UQ IMD meter gives me an LED readout of my IMD while I'm transmitting. Reports I get on the air are almost always within a couple dB of the meter reading. 73, Kev - K4VD On 1/25/06, Richard [EMAIL PROTECTED] wrote: I am interested in verifying that I am not over-driving PSK31. Is there a simple signal conditioning interface to an oscilloscope input? Thanks Rich Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) SPONSORED LINKS Ham radio Craft hobby Hobby and craft supply Icom ham radio Yaesu ham radio YAHOO! GROUPS LINKS Visit your group "digitalradio" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[digitalradio] Re: Viewing Modulation with Oscilloscope
Very clever! Thanks David --- In digitalradio@yahoogroups.com, [EMAIL PROTECTED] wrote: I have a metal experimenter's case with SO-239 chassis mount connectors on either end. Between the connectors is a solid piece of wire (from coat hanger) soldered in place. Also on the outside of the box is a BNC Connector that has it's center terminal going to a 12 length of insulated / flexible wire that is wrapped around the coat-hanger wire and the other end is terminated to the case using a ring terminal. This allows feed-through operation of the unit under test and a pick-up point for frequency, waveform, etc. Most of the time, I leave it connected to a wide-range watt meter using a right angle adapter with a double male UHF adapter. You can very the length/wraps of the wire going to the BNC, dependent on what strength signal you want to extract. It may be possible to have a number of BNC connectors, each with a different number wraps for a varied choice of signal strength. David KD4NUE -Original Message- From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Richard Sent: Thursday, January 26, 2006 2:32 AM To: digitalradio@yahoogroups.com Subject: [digitalradio] Re: Viewing Modulation with Oscilloscope Thanks Kev. I happen to have a toroid and some magnet wire. I feed the antenna wire through the torid which has about 30-40 turns on it. It can see the signal fairly well this way. Rich KG6ZTC --- In digitalradio@yahoogroups.com, Kevin der Kinderen [EMAIL PROTECTED] wrote: Rich: I should know the exact answer to this - an RF tap to pull a little power off the transmit sig - but I'm not sure what device to recomment. Have you considered one of the imd meters available? I use the KK7UQ IMD meter but an alternative is the PSKMeter. The KK7UQ IMD meter gives me an LED readout of my IMD while I'm transmitting. Reports I get on the air are almost always within a couple dB of the meter reading. 73, Kev - K4VD On 1/25/06, Richard [EMAIL PROTECTED] wrote: I am interested in verifying that I am not over-driving PSK31. Is there a simple signal conditioning interface to an oscilloscope input? Thanks Rich Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) SPONSORED LINKS Ham http://groups.yahoo.com/gads?t=msk=Ham+radiow1=Ham+radiow2=Craft+hob byw3=Hobby+and+craft+supplyw4=Icom+ham+radiow5=Yaesu+ham+radioc=5s= 101.sig=NStjWgsFtXmQaGrYd1LT5w radio Craft http://groups.yahoo.com/gads?t=msk=Craft+hobbyw1=Ham+radiow2=Craft+h obbyw3=Hobby+and+craft+supplyw4=Icom+ham+radiow5=Yaesu+ham+radioc=5 s=101.sig=RIfve-PXBTtOVJV48uzEVQ hobby Hobby http://groups.yahoo.com/gads?t=msk=Hobby+and+craft+supplyw1=Ham+radio w2=Craft+hobbyw3=Hobby+and+craft+supplyw4=Icom+ham+radiow5=Yaesu+ham +radioc=5s=101.sig=Qz1juq9z5gSL9A5AR8aLNA and craft supply Icom http://groups.yahoo.com/gads?t=msk=Icom+ham+radiow1=Ham+radiow2=Craf t+hobbyw3=Hobby+and+craft+supplyw4=Icom+ham+radiow5=Yaesu+ham+radioc =5s=101.sig=_InABMy_m6lCJHFiWobT2w ham radio Yaesu http://groups.yahoo.com/gads?t=msk=Yaesu+ham+radiow1=Ham+radiow2=Cra ft+hobbyw3=Hobby+and+craft+supplyw4=Icom+ham+radiow5=Yaesu+ham+radio c=5s=101.sig=9lSLfMHwXV-vjTYO4qyD8w ham radio _ YAHOO! GROUPS LINKS * Visit your group digitalradio http://groups.yahoo.com/group/digitalradio on the web. * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to the Yahoo! http://docs.yahoo.com/info/terms/ Terms of Service. _ Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[digitalradio] Re: Viewing Modulation with Oscilloscope
Thanks Kev. I happen to have a toroid and some magnet wire. I feed the antenna wire through the torid which has about 30-40 turns on it. It can see the signal fairly well this way. Rich KG6ZTC --- In digitalradio@yahoogroups.com, Kevin der Kinderen [EMAIL PROTECTED] wrote: Rich: I should know the exact answer to this - an RF tap to pull a little power off the transmit sig - but I'm not sure what device to recomment. Have you considered one of the imd meters available? I use the KK7UQ IMD meter but an alternative is the PSKMeter. The KK7UQ IMD meter gives me an LED readout of my IMD while I'm transmitting. Reports I get on the air are almost always within a couple dB of the meter reading. 73, Kev - K4VD On 1/25/06, Richard [EMAIL PROTECTED] wrote: I am interested in verifying that I am not over-driving PSK31. Is there a simple signal conditioning interface to an oscilloscope input? Thanks Rich Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[digitalradio] Re: Viewing Modulation with Oscilloscope
There is a device called the PSK meter: http://www.ssiserver.com/info/pskmeter/ Or if you have access to an older ARRL Handbook look for alignment of SSB transmitters using a two tone generator. Shows how to sample the signal from the transmitter output to view your SSB envelope. PSK is pretty close to the two tone generator method. HTH, Jerry - K0HZI --- In digitalradio@yahoogroups.com, Richard [EMAIL PROTECTED] wrote: I am interested in verifying that I am not over-driving PSK31. Is there a simple signal conditioning interface to an oscilloscope input? Thanks Rich Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[digitalradio] Re: Viewing Modulation with Oscilloscope
I have put a toroid on my antenna cable which has about 30-40 turns on it. Hooking my scope to this allows me to see a fairly good picture of what is happening. Good thing I don't have perfect SWR. Rich --- In digitalradio@yahoogroups.com, Jerry W [EMAIL PROTECTED] wrote: There is a device called the PSK meter: http://www.ssiserver.com/info/pskmeter/ Or if you have access to an older ARRL Handbook look for alignment of SSB transmitters using a two tone generator. Shows how to sample the signal from the transmitter output to view your SSB envelope. PSK is pretty close to the two tone generator method. HTH, Jerry - K0HZI --- In digitalradio@yahoogroups.com, Richard [EMAIL PROTECTED] wrote: I am interested in verifying that I am not over-driving PSK31. Is there a simple signal conditioning interface to an oscilloscope input? Thanks Rich Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
