Sadoun Tech Forums

 Save! Satellite Packages

  Latest Satellite Receivers

C & KU  Dishes & Mounts

 

Go Back   Sadoun Tech Forums > Satellite Forums > System Installation > Installation Support
Register
Home Register FAQ Members List Members World Map Calendar Arcade Search Today's Posts Mark Forums Read

Installation Support Post questions about installations issues.

Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 10-20-2006, 07:35 PM
Inverted's Avatar
Inverted Inverted is offline
Junior Member
Newbie
 
Join Date: Sep 2006
Location: Lake Erie
Posts: 21
Rep Power: 0
Inverted is on a distinguished road
232 cable question

I recently purchased a S-1 system from Sadoun and I forgot to click for the free 232 cable. So now I am trying to make one....

My question is this. What is the difference between a 232 straight and a 232 null? I am assuming there is all continuity on a straight wire pins and some wires swapped on some pins on the null.

Thanks ahead for your time and help on this matter.
__________________
Fortec classic NA
80cm Fortec dish
Invacom QPH-031 LNB
SG-2100 motor
Reply With Quote
  #2 (permalink)  
Old 10-20-2006, 11:33 PM
be236's Avatar
be236 be236 is offline
Senior Member
Wiz
 
Join Date: Jan 2004
Posts: 365
Rep Power: 209
be236 is on a distinguished road
I think the null modem cable has pins 2 and 3 swapped. Not sure what other pins may be swapped also.
Reply With Quote
  #3 (permalink)  
Old 10-21-2006, 06:27 AM
rainman's Avatar
rainman rainman is offline
Storm Chaser
Expert
 
Join Date: Oct 2005
Location: Louisa KY
Posts: 4,624
Rep Power: 576
rainman is just really nicerainman is just really nicerainman is just really nicerainman is just really nicerainman is just really nice
Send a message via MSN to rainman Send a message via Yahoo to rainman
Quote:
Originally Posted by Inverted
I recently purchased a S-1 system from Sadoun and I forgot to click for the free 232 cable. So now I am trying to make one....

My question is this. What is the difference between a 232 straight and a 232 null? I am assuming there is all continuity on a straight wire pins and some wires swapped on some pins on the null.

Thanks ahead for your time and help on this matter.
check your receiver manual it should tell you what cable you need. on my ultra manual shows the pinout on both straight and null cables.
__________________
Rainman's Equipment
Undien 4600,DSR 922
Fortec Ultra, Satworks 3618
2 Fortec Mercury II
Fortec Classic NA
8.5' Orbitron polar C Ku dish
8.5' Birdview HH C Ku dish
100cm Fortec dish
90cm Fortec dish
2 DG-240 HH motors
Co Rotor II feed horn
Norsat 8515 C band lnb
Norsat 4506A Ku lnb
BSC-621-2 Lnbf
Invacom QPH-031 Lnbf
Invacom SNH-031 Lnbf
Fortec Fsku-v universal Lnbf
V-Box

I Like To Shop at Sadoun Satellite Sales.www.sadoun.com
Reply With Quote
  #4 (permalink)  
Old 10-21-2006, 10:48 AM
Inverted's Avatar
Inverted Inverted is offline
Junior Member
Newbie
 
Join Date: Sep 2006
Location: Lake Erie
Posts: 21
Rep Power: 0
Inverted is on a distinguished road
Quote:
Originally Posted by rainman
check your receiver manual it should tell you what cable you need. on my ultra manual shows the pinout on both straight and null cables.
Thanks Rainman, I can't find my manual for the classic na recv'r. I'll see if someone has a copy online.
__________________
Fortec classic NA
80cm Fortec dish
Invacom QPH-031 LNB
SG-2100 motor
Reply With Quote
  #5 (permalink)  
Old 10-21-2006, 12:33 PM
pictureon's Avatar
pictureon pictureon is offline
Senior Member
Pro
 
Join Date: Mar 2004
Location: Sacramento CA. Bay Area
Posts: 502
Rep Power: 217
pictureon is on a distinguished road
Fortec Classic uses a null cable for update (PC to receiver).
It's connected as follows

1+6-4,
2-3,
3-2,
4-1+6,
5-5,
7-8,
8-7,
G-G.
Reply With Quote
  #6 (permalink)  
Old 10-21-2006, 04:52 PM
pmb1010's Avatar
pmb1010 pmb1010 is offline
Super Pro
Expert
 
Join Date: Feb 2004
Posts: 1,272
Rep Power: 305
pmb1010 is a splendid one to beholdpmb1010 is a splendid one to beholdpmb1010 is a splendid one to beholdpmb1010 is a splendid one to beholdpmb1010 is a splendid one to beholdpmb1010 is a splendid one to beholdpmb1010 is a splendid one to behold
http://www.uoguelph.ca/~antoon/circ/nulmodem.htm

you can get them at radio shack if you dont feel like making one:
Cables To Go 6-Ft. DB9 F/F Null Modem Cable

$14.99
Model: 03044
Catalog #: 55010600
Reply With Quote
  #7 (permalink)  
Old 10-22-2006, 09:45 AM
wejones's Avatar
wejones wejones is offline
Cranky Crumudgeon
Expert
 
Join Date: Aug 2003
Location: MAINE
Posts: 2,755
Rep Power: 471
wejones is a splendid one to beholdwejones is a splendid one to beholdwejones is a splendid one to beholdwejones is a splendid one to beholdwejones is a splendid one to beholdwejones is a splendid one to beholdwejones is a splendid one to behold
I don't have a Classic, but I know that this Classic receiver seems to be strange and different from the earlier Fortec receivers, and I have been wrong before about the way things are done with the Classic. However I really have my doubts that a null modem cable is really needed. I don't doubt that it will work, if that's what the manual calls for, however if someone is trying to make their own cable, I wonder if all those wires are really needed, and perhaps a simple crossover cable might work, ie 2-3,3-2,5-5 ??

All those other wires are often needed if the software uses hardware handshaking, but that is getting more and more rare these days. Almost everything I've wired serial cables for in the last decade have not needed the hardware handshaking wires. I'm just curious whether anyone with a Classic has tried a 3-wire cable. The 3-wire cables work fine for my Lifetime and Ultra, and for several scanners, and other devices I've made cables for. Nice thing about the 3 wire approach is that you can use thin modular telephone line, and radio shack sells modular connectors for telephone wire that you can choose what pin goes where.

Anyway, I haven't seen a device that really needed a null-modem cable for years. Of course it wouldn't surprise me if it was the Classic that broke that string, because Fortec seems to have decided to re-invent the wheel with that receiver, instead of using what works and getting rid of what doesn't work, from past receivers.
__________________
Bill in Maine

Sadoun has censored my signature for no good reason, which is annoying.
Reply With Quote
  #8 (permalink)  
Old 10-23-2006, 12:14 PM
elgemcdlf's Avatar
elgemcdlf elgemcdlf is offline
Super Pro
Expert
 
Join Date: Dec 2005
Location: Carlisle, IN
Posts: 1,973
Rep Power: 306
elgemcdlf is a splendid one to beholdelgemcdlf is a splendid one to beholdelgemcdlf is a splendid one to beholdelgemcdlf is a splendid one to beholdelgemcdlf is a splendid one to beholdelgemcdlf is a splendid one to beholdelgemcdlf is a splendid one to behold
Send a message via MSN to elgemcdlf Send a message via Yahoo to elgemcdlf
I bought a straight through cable at Radio Shack with all the adapters to make it work F2F, F2M in both modes, straight thru and NULL. Total cost was less than $30.00
__________________
8.5' Mesh Dish w/ C & Ku lnb's & 24" actuator
8.5' Mesh Dish w/ BSC621-2 fixed install for circular C Band on 40.5
Fortec Star 90cm Dish w/ FSKUv lnbf & DMSISG2100
Motorola DSR922
Fortec Mercury II
Digital Stream HD1150.
Reply With Quote
  #9 (permalink)  
Old 10-24-2006, 11:42 AM
Inverted's Avatar
Inverted Inverted is offline
Junior Member
Newbie
 
Join Date: Sep 2006
Location: Lake Erie
Posts: 21
Rep Power: 0
Inverted is on a distinguished road
Thanks everyone for your help......I gave up and bought a 6ft cable for .99 cents with $2.99 ship/handle from California. I just got it today.
__________________
Fortec classic NA
80cm Fortec dish
Invacom QPH-031 LNB
SG-2100 motor
Reply With Quote
  #10 (permalink)  
Old 10-24-2006, 06:46 PM
boroda1 boroda1 is offline
Senior Member
Pro
 
Join Date: Mar 2006
Location: San Jose, CA
Posts: 507
Rep Power: 145
boroda1 is on a distinguished road
I got that too - NULL-Modem, worked great with Manhattan receiver
__________________
-----------------------------------------------
:: FS 31" Offset Dish, ::::::::::::::::::::::::::::
:::: Satcontrol SM3D22 motor, ::::::::::::::
:::::: KUL2 Dual Standard LNBf, :::::::::::
:::::::: Fortec Lifetime Ultra, :::::::::::::::::::::
:::::::::: Twinhan Starbox USB - still unused ::
-----------------------------------------------
Reply With Quote
Reply



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

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


All times are GMT -4. The time now is 06:40 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2008, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.0.0 RC6
Copyright , Sadoun.com