Thursday, April 30, 2009
What is this signal?
Monday, April 27, 2009
Tuscaloosa AM Stations on 75m
AM stations in Tuscaloosa, Alabama broadcasting harmonics splatter across 75m.
Thursday, April 23, 2009
ATT Mystery Tone
We have two ATT lines coming into our house. Line 1 "appears" to be subject to some very strange form of RFI.
When I am operating on 75m (3.968) the person in the house will seem to "lose" the calling party for a short period of time--the line seems to go dead. During this period of silence, the calling party hears a steady tone lasting for no more than 2-3 seconds followed immediate by a chirp (almost like a FAX negotiation tone) and then connectivity is restored. Now the interesting part of the story...this happens several seconds AFTER I go key up...release the PTT.
I have recorded this phenomena for your listening enjoyment. This is the full testing protocol. This recording is just the resulting tone and chirp.
When I am operating on 75m (3.968) the person in the house will seem to "lose" the calling party for a short period of time--the line seems to go dead. During this period of silence, the calling party hears a steady tone lasting for no more than 2-3 seconds followed immediate by a chirp (almost like a FAX negotiation tone) and then connectivity is restored. Now the interesting part of the story...this happens several seconds AFTER I go key up...release the PTT.
I have recorded this phenomena for your listening enjoyment. This is the full testing protocol. This recording is just the resulting tone and chirp.
Wednesday, April 15, 2009
Thursday, April 9, 2009
Palstar AT1500CV Q-Test
An FT-1000mp Mark V was tuned to 7.2MHz. A Palstar AT1500CV was used to create a 1:1 match on a 75m/40m fan dipole. The frequency on the FT-1000 was then incremented in 10KHZ steps up to 7.3MHz. The following video shows the resulting SWR. Compare this to a similar Tentec trial which follows. I did not go down the band as in the Tentec trial.
Wednesday, April 8, 2009
Monday, April 6, 2009
Receiver Metrics--IMD & IP3
I think we really need to turn the IMD/IP3 presentation into a QST article.
Download the PPT presentation.
View the PPT presentation.
Download the PPT presentation.
View the PPT presentation.
Thursday, April 2, 2009
Wednesday, April 1, 2009
Monday, March 30, 2009
Saturday, March 28, 2009
Friday, March 27, 2009
Thursday, March 26, 2009
Tuesday, March 24, 2009
Sunday, March 22, 2009
Palstar Tuner
Tuesday, March 17, 2009
Saturday, March 14, 2009
Tuesday, March 10, 2009
Log at 1622 Alaca Place
All Entries
CURRENT MODEM STATUSDSL Modem Status....... Up
PPP Session Status...... Up
Connection Type......... PPPoE
Time set from............. Local
Time since last boot.... 16 days, 0 hrs: 5 mins: 44 secs
Time last modem self test.. WED AUG 20 20:53:50 2008
Time last modem result.... PASS
EVENTS
**********************************************************************
Events are listed starting from the most recent. **********************************************************************
THU MAR 05 22:47:57 2009 Setting System clock to Local time THU MAR 05 22:47:57 2009
THU MAR 05 22:47:57 2009 Time set from Primary SNTP server: tock.usno.navy.mil
THU MAR 05 22:47:57 2009 PPP CONNECTED on VPI 8 VCI 35
THU MAR 05 22:47:57 2009 Connecting session(0): Auto Registration due to AutoConnect request
THU MAR 05 22:47:57 2009 LAN PC unable to communicate with DNS Server.(error = 'connection refused', count=9)
THU MAR 05 22:47:56 2009 Disconnecting session(0): Auto Registration due to PADT received
THU MAR 05 22:47:56 2009 Received PADT for session id 18188
THU MAR 05 22:47:56 2009 LAN PC unable to communicate with DNS Server.(error = 'connection refused', count=6)
THU MAR 05 22:47:55 2009 LAN PC unable to communicate with DNS Server.(error = 'connection refused', count=3)
THU MAR 05 22:47:53 2009 PPP DISCONNECTED on VPI 8 VCI 35 : PPP commanded down
THU MAR 05 22:47:53 2009 Disconnecting session(0): Auto Registration due to dsl Restart
THU MAR 05 22:47:44 2009 US Atten: 16.0 DS Atten: 22.5
THU MAR 05 22:47:44 2009 US Margin: 12.0 DS Margin: 15.0
THU MAR 05 22:47:44 2009 US Tx Power: 1.2 DS Tx Power: 19.7
THU MAR 05 22:47:44 2009 US DSL Rate: 512 kbits/sec DS DSL Rate: 8128 kbits/sec
THU MAR 05 22:47:44 2009 WanMgr reports DSL is UP
THU MAR 05 22:47:25 2009 WanMgr reports DSL is Down
TUE MAR 03 05:12:25 2009 CWMP: Final Http Return Code = 204
TUE MAR 03 05:12:21 2009 CWMP: Inform (200). The following events are true: 2 PERIODIC
TUE MAR 03 05:12:21 2009 CWMP: TCP Connected, SSL Connection Succeeded, Auth Type = Basic
MON MAR 02 10:51:01 2009 LAN PC unable to communicate with DNS Server.(error = 'connection timed out', count=6)
MON MAR 02 10:50:54 2009 LAN PC unable to communicate with DNS Server.(error = 'connection timed out', count=3)
MON MAR 02 09:40:45 2009 CWMP: Final Http Return Code = 204
MON MAR 02 09:40:45 2009 CWMP: Inform (200). The following events are true: 2 PERIODIC
MON MAR 02 09:40:45 2009 CWMP: TCP Connected, SSL Connection Succeeded, Auth Type = Basic
SUN MAR 01 00:30:48 2009 Auto Calendar Upgrade check performed, no upgrade required (3)
FRI FEB 27 18:19:17 2009 Setting System clock to Local time FRI FEB 27 18:19:11 2009
FRI FEB 27 18:19:17 2009 Time set from Primary SNTP server: tock.usno.navy.mil
FRI FEB 27 18:19:15 2009 PPP CONNECTED on VPI 8 VCI 35
FRI FEB 27 18:19:15 2009 Connecting session(0): Auto Registration due to AutoConnect request
FRI FEB 27 18:19:07 2009 Disconnecting session(-1): due to PADT received
FRI FEB 27 18:19:07 2009 Received PADT for session id 18762
FRI FEB 27 18:19:07 2009 PPP DISCONNECTED on VPI 8 VCI 35 : PPP commanded down
FRI FEB 27 18:19:07 2009 Disconnecting session(0): Auto Registration due to dsl Restart
FRI FEB 27 18:18:58 2009 US Atten: 16.0 DS Atten: 22.5
FRI FEB 27 18:18:58 2009 US Margin: 12.0 DS Margin: 14.0
FRI FEB 27 18:18:58 2009 US Tx Power: 1.5 DS Tx Power: 19.7
FRI FEB 27 18:18:58 2009 US DSL Rate: 512 kbits/sec DS DSL Rate: 8128 kbits/sec
FRI FEB 27 18:18:58 2009 WanMgr reports DSL is UP
FRI FEB 27 18:18:38 2009 WanMgr reports DSL is Down
MON FEB 23 03:52:14 2009 Auto Calendar Upgrade check performed, no upgrade required
SUN FEB 22 08:27:46 2009 CWMP: Final Http Return Code = 204
SUN FEB 22 08:27:44 2009 CWMP: Inform (200). The following events are true: 1 BOOT
SUN FEB 22 08:27:44 2009 CWMP: TCP Connected, SSL Connection Succeeded, Auth Type = Basic
SUN FEB 22 08:27:18 2009 Setting System clock to Local time SUN FEB 22 08:27:06 2009
SUN FEB 22 08:27:18 2009 Time set from Primary SNTP server: tock.usno.navy.mil
SUN FEB 22 08:27:13 2009 PPP CONNECTED on VPI 8 VCI 35
SUN FEB 22 08:27:13 2009 Connecting session(0): Auto Registration due to dsl Restart
SUN FEB 22 08:26:57 2009 US Atten: 16.0 DS Atten: 22.0
SUN FEB 22 08:26:57 2009 US Margin: 12.0 DS Margin: 17.0
SUN FEB 22 08:26:57 2009 US Tx Power: 1.2 DS Tx Power: 19.7
SUN FEB 22 08:26:57 2009 US DSL Rate: 512 kbits/sec DS DSL Rate: 8128 kbits/sec
SUN FEB 22 08:26:57 2009 WanMgr reports DSL is UP
SUN FEB 22 08:26:44 2009 Transceiver Software Version: 5.2.2.0
SUN FEB 22 08:26:43 2009 Model Number: C90-610030-06
SUN FEB 22 08:26:43 2009 Software Version: VER:03.08.02
SUN FEB 22 08:26:43 2009 Product: ProLine Model: NAT Combo
end of diagnostic log file
Monday, March 9, 2009
Saturday, March 7, 2009
Thursday, March 5, 2009
Ground Buss
Receive Antenna -- Dipole Comparison
This is a comparison of the receive antenna and the fan dipole. Notice the "core noise" on the right-most wave form.
Monday, March 2, 2009
Sunday, March 1, 2009
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