New Products Flash Sale
Thread Tools
Old Oct 20, 2012, 01:36 AM
Grich is offline
Find More Posts by Grich
Registered User
Grich's Avatar
Jim, the dx18 now has two xmitter antennas one vertical and one horizontal located in the handle. That sounds like a good idea. Whats ur thoughts?
Sign up now
to remove ads between posts
Old Oct 20, 2012, 12:13 PM
JimDrew is offline
Find More Posts by JimDrew
Xtreme Power Systems
Our DivBee module has diversity.
RCG Plus Member
Old Oct 20, 2012, 03:33 PM
fredtrex17 is offline
Find More Posts by fredtrex17
Registered User
Hello Jim,

No delay or news for the first batch ??

A+FRED
Old Oct 20, 2012, 03:34 PM
Grich is offline
Find More Posts by Grich
Registered User
Grich's Avatar
so with the DivBee module, the two antenna's are unnecessary?
Old Oct 20, 2012, 04:08 PM
KB9STD is offline
Find More Posts by KB9STD
Registered User
Quote:
Originally Posted by Grich View Post
Jim, the dx18 now has two xmitter antennas one vertical and one horizontal located in the handle. That sounds like a good idea. Whats ur thoughts?
That sounds almost like they are using "Circular Polarization".I would think it a waste,to have the two antennas perpendicular and NOT use circular polarity!!
Old Oct 20, 2012, 06:42 PM
E_ferret is offline
Find More Posts by E_ferret
Registered User
E_ferret's Avatar
Quote:
Originally Posted by KB9STD View Post
That sounds almost like they are using "Circular Polarization".I would think it a waste,to have the two antennas perpendicular and NOT use circular polarity!!
cant stop progress, next in the works will be a Moebius loop antenna.
BTW you forgot the "big grin" smilies.
Old Oct 21, 2012, 01:02 AM
Grich is offline
Find More Posts by Grich
Registered User
Grich's Avatar
what bug's me about this forum is that when i finally have a decent question for Jim, the peanut gallery has to chime in instead of waiting for Jim to see the actual question and replying instead of him having to read through others reply's.
Old Oct 21, 2012, 02:42 AM
kgfly is offline
Find More Posts by kgfly
Registered User
Quote:
Originally Posted by Grich View Post
so with the DivBee module, the two antenna's are unnecessary?
'diversity' means that it is able to use two antennae and select the one with the strongest signal at any point in time. By having two antennae at right angles one can minimize polarisation losses.
Old Oct 21, 2012, 10:22 AM
Grich is offline
Find More Posts by Grich
Registered User
Grich's Avatar
That reply of diversity brings me back to the question of would two antennas at right angles at the XPS transmitter work better. This of course would have to be in the next version of transmitter after the release of the XPS-3216.
Old Oct 21, 2012, 11:05 AM
KB9STD is offline
Find More Posts by KB9STD
Registered User
Quote:
Originally Posted by Grich View Post
what bug's me about this forum is that when i finally have a decent question for Jim, the peanut gallery has to chime in instead of waiting for Jim to see the actual question and replying instead of him having to read through others reply's.
Sounds to me like SOMEone wishes a Private forum.Wait;That wouldn't BE a FORUM!
Doesn't everyone have access to the "Private Message" feature??? Maybe SKIPE would be better suited to their personal liking??
Old Oct 21, 2012, 01:36 PM
ryan_m is offline
Find More Posts by ryan_m
doh!
ryan_m's Avatar
Or... all the naysayers that have nothing positive to contribute could keep their opinions to themselves. I understand the frustration with waiting for this product to come out. Truly I do, I would love to have it. But either decide to wait, or move on. Hanging around and spouting off negativity helps nobody.
Old Oct 21, 2012, 02:23 PM
tholmes345 is offline
Find More Posts by tholmes345
Fly inverted, it's more fun.
tholmes345's Avatar
Quote:
Originally Posted by ryan_m View Post
Or... all the naysayers that have nothing positive to contribute could keep their opinions to themselves. I understand the frustration with waiting for this product to come out. Truly I do, I would love to have it. But either decide to wait, or move on. Hanging around and spouting off negativity helps nobody.
Amen and AMEN!
Old Oct 21, 2012, 04:41 PM
blade thrasher is offline
Find More Posts by blade thrasher
KJ4IKY Gravity Wins
blade thrasher's Avatar
Are there any more pictures of the Tx that I missed in the last 2 years of threads?

Im not really sure if these are images of the XPS but its all I could find.
Last edited by blade thrasher; Oct 21, 2012 at 04:47 PM.
Old Oct 21, 2012, 06:21 PM
kgfly is offline
Find More Posts by kgfly
Registered User
Quote:
Originally Posted by Grich View Post
That reply of diversity brings me back to the question of would two antennas at right angles at the XPS transmitter work better. This of course would have to be in the next version of transmitter after the release of the XPS-3216.
Probably yes. Remember that the Tx and the Rx are both transceivers. Commands go from the Tx to the Rx and telemetry goes from the Rx to the Tx. Using two antennae reduces polarisation mismatch and hence increases reliability and effective range.
Old Oct 22, 2012, 07:49 PM
JimDrew is offline
Find More Posts by JimDrew
Xtreme Power Systems
You don't need antennas at right angles, but that would be optimal to help eliminate path loss.

The DivBee module automatically selects the best antenna for reception and uses that during the course of receiving a packet. The ACK (and telemetry) are transmitted back on the same antenna that was used for reception as that is likely the best antenna to use at that very moment in time.
RCG Plus Member


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Sold XPS 2.4GHz JR Transmitter Module (9x) az_heliguy Aircraft - General - Radio Equipment (FS/W) 19 Apr 05, 2012 12:07 AM
For Sale Hacker / Spin 170 Controller, XPS Pro Dynamax, 15S 6800 XPS packs in 3S bricks. penceaviation Aircraft - Electric - Jets (FS/W) 9 Oct 13, 2011 08:55 AM
Wanted XPS 6800mah 65c 6s want to trade for xps 5000mah 65c and will pay difference sherlockshah Aircraft - Electric - Batteries & Chargers (FS/W) 3 Oct 12, 2011 09:30 AM
For Sale 3s xps 5000mah 65c $60 shipped with warranty also 2s xps 5000mah 65c $45 shipped with sherlockshah Aircraft - Electric - Batteries & Chargers (FS/W) 2 Sep 24, 2011 01:48 PM
Sold TransMitt transmitter bag / warmer**price drop** aerosheldon Aircraft - General - Radio Equipment (FS/W) 5 Mar 31, 2011 01:40 PM