Go Back   Cruiser Log World Cruising & Sailing Forums > Cruising Forums > The Bosun's Locker > Power & Electronics
Cruiser Wiki

Join Cruiser Log Today

Reply
 
Thread Tools Search this Thread Display Modes
 
Old 12-03-2008, 11:20 PM   #1
Ensign
 
Join Date: Apr 2008
Posts: 3
Default

Hi,

I started trying to get Weatherfaxes through my SSB receiver last week. The receiver is a portable Eton E5. It doesn't have a USB/LSB switch. I am able to hear the time signals and the Chubasco Cruising Net on it (I am in San Diego, California).

I think I am actually getting the fax signals into my computer but the image is messed up.

From looking at the resulting image (please see my attachment) it looks like there is some lack of synchronisation somewhere.

Also, the two frequency peaks of the signal seem to be slightly over 800 Hz appart, so I can never overlay both peaks with the vertical red lines...

I have set up (I think) the sampling frequency of my sound card at 11025 Hz (see my second screen print)

I am trying to receive from NOAA in Point Reyes at 8682 KHz, setting 120LPM, 576 IOC just like the NOAA website says.

Any ideas anybody? Please help!!
Attached Images
File Type: jpg SeaTTY_screenshot.jpg (115.9 KB, 62 views)
__________________

__________________
desierto is offline   Reply With Quote
Old 12-05-2008, 11:43 PM   #2
Ensign
 
Auspicious's Avatar
 
Join Date: Sep 2007
Posts: 37
Default

You need an SSB receiver - the difference between the received signal and the local BFO results in the audio signal that your software uses to generate the fax image.
__________________

__________________
sail fast, dave

S/V Auspicious
Auspicious is offline   Reply With Quote
Old 12-14-2008, 12:37 AM   #3
Moderator
 
redbopeep's Avatar
 
Join Date: Jun 2007
Home Port: Washington DC
Vessel Name: SV Mahdee
Posts: 3,186
Default

Quote:
Originally Posted by Auspicious View Post
You need an SSB receiver - the difference between the received signal and the local BFO results in the audio signal that your software uses to generate the fax image.
I just looked up his radio (cool little thing, btw) here's a link to the product spec .pdf

So, this little radio is an SSB reciever.

The owner's manual, here, on page 8 talks about SSB and using for weather fax. Not much info but does say that for best SSB place the DX/Local switch in the Local setting.

Can't help further than that. Hope you've figured it out by now...look forward to hearing about your success.

Brenda
__________________
"Do or do not. There is no try." - Yoda

What we're doing - The sailing life aboard and the Schooner Chandlery.

redbopeep is offline   Reply With Quote
Old 12-14-2008, 11:18 AM   #4
Moderator
 
JeanneP's Avatar
 
Join Date: Jul 2004
Posts: 2,098
Default

It is too long since I've used SSB to receive WFAX, but the published frequency is not the frequency that you tune into to receive fax. It is 2 mhz higher or lower than the published frequency (or is it .2 mhz? - darn, these skills leave us really quickly when we're not using them daily). Try that tuning and see what happens.
__________________
In 1986 we went cruising for a few years. After 20 years and 50+ countries and several oceans, we are STILL "cruising for a few years".

SY WATERMELON |
MV WATERMELON (New) | Cruiser's Dictionary, free ebook

= Cruiser's Dictionary, North America,
JeanneP is offline   Reply With Quote
Old 12-14-2008, 05:03 PM   #5
Moderator
 
redbopeep's Avatar
 
Join Date: Jun 2007
Home Port: Washington DC
Vessel Name: SV Mahdee
Posts: 3,186
Default

Quote:
Originally Posted by JeanneP View Post
It is too long since I've used SSB to receive WFAX, but the published frequency is not the frequency that you tune into to receive fax. It is 2 mhz higher or lower than the published frequency (or is it .2 mhz? - darn, these skills leave us really quickly when we're not using them daily). Try that tuning and see what happens.
Never having done it, we can't say, but David thinks that if its a true SSB receiver, you tune into the actual frequency and make sure that the radio automatically moves to either the upper or lower sideband. That's the shift. Some of the radios have a switch that you use to select upper or lower sideband. If not using a true SSB radio--like many marine radios--then you have to manually tune in the sideband.

That's our knowledge, not much, but there it is
__________________
"Do or do not. There is no try." - Yoda

What we're doing - The sailing life aboard and the Schooner Chandlery.

redbopeep is offline   Reply With Quote
Old 12-14-2008, 07:27 PM   #6
Admiral
 
Nausikaa's Avatar
 
Join Date: Sep 2005
Posts: 1,619
Default

I am sure MMNSETSEA will be along soon to offer clarity on this issue but, until he does, I wonder what one does with a DSB receiver? Is the above post confusing a DSB with a SSB with the choice of upper or lower SSB, which makes it a DSB in my books? I don't know. I am not a radio technocrat but I am sure MMNETSEA can give us the answer.

Aye // Stephen
__________________
Yacht NAUSIKAA | Call Sign: 2AJH2




WHEN WAS THE LAST TIME YOU DID SOMETHING FOR THE FIRST TIME?

www.nausikaa.org.uk

= Sweden, Norway, Denmark, Lithuania
Nausikaa is offline   Reply With Quote
Old 12-14-2008, 09:19 PM   #7
Moderator
 
redbopeep's Avatar
 
Join Date: Jun 2007
Home Port: Washington DC
Vessel Name: SV Mahdee
Posts: 3,186
Default

Quote:
Originally Posted by Nausikaa View Post
I am sure MMNSETSEA will be along soon to offer clarity on this issue but, until he does, I wonder what one does with a DSB receiver? Is the above post confusing a DSB with a SSB with the choice of upper or lower SSB, which makes it a DSB in my books? I don't know. I am not a radio technocrat but I am sure MMNETSEA can give us the answer.

Aye // Stephen
dunno...not a radio technocrat either. However, what I do know is that the original poster desierto should have been able to use his radio to get weatherfaxes without problems. Nifty little back up SSB radio that one is. List price something like $170 US which means street price of around $100 US. Good deal for back up SSB or someone who just wants weatherfax capability.
__________________
"Do or do not. There is no try." - Yoda

What we're doing - The sailing life aboard and the Schooner Chandlery.

redbopeep is offline   Reply With Quote
Old 12-14-2008, 10:21 PM   #8
Admiral
 
MMNETSEA's Avatar
 
Join Date: Oct 2004
Posts: 3,067
Default

Hello Desierto,

The Eton E5 now discontinued is a SSB receiver covering both upper and lower side bands

(USB & LS

Noted that you are trying to tune on 8682 KHz (8,682 MHz) which is on the USB. Therefore set yours to USB.

The manual does not mention an additional antenna - other than the telescopic - which is probably no longer than a metre, when extended. If there is a female jack plug for an antenna on the rear of the set, get around 9 yards of single plastic covered 1 mm wire - plug that into the jack plug orifice and the other end string up to a spreader.

IF there is no antenna receptacle provided, then attach the wire to the telescopic by twisting a bared couple of inches of wire around the telescopic - then hoist the other end to the spreader. That will improve reception.

If you are still having problems speak to Eton - here is their Email : CustomerSvc#etoncorp.com

Good luck

Richard
__________________

__________________
MMNETSEA is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Weatherfax For Macs greexc General Cruising Forum 0 03-11-2009 04:44 PM

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

RV & Travel Trailer Communities

Our RV & Travel Trailer sites encompasses virtually all types of Recreational Vehicles, from brand-specific to general RV communities.

» More about our RV Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


All times are GMT. The time now is 08:18 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.0