60C and Cateye Wireless Bike Computer Dont Work Together

On 6 Jun 2004 01:36:24 -0700, [email hidden] (David)

Quoted message said:

As per the the title, I have the Garmin 60C and Cateye
mounted next to each other on my bike handlebar, and
whenever the GPS is switched on the Cateye goes bezerk and
records about half the pulses it should. No idea why this
happens, and I suppose the cycle computer is almost
redundant, but thought you'd like to know... Dave

Every GPS I've ever owned interfered with every wireless
bike computer I've every had. GPS receivers, like most other
radio receivers, emit a weak signal from their internals.

Try moving the devices to opposite sides of the bars. In
many cases 6-8" of separation was all that was needed in my
case. I used to enjoy seeing 88 MPH as a max speed on my
Polar computer. <G>

Barry

[email hidden] (David) wrote in message news:<[email hidden]>...

Quoted message said:

As per the the title, I have the Garmin 60C and Cateye
mounted next to each other on my bike handlebar, and
whenever the GPS is switched on the Cateye goes bezerk and
records about half the pulses it should. No idea why this
happens, and I suppose the cycle computer is almost
redundant, but thought you'd like to know... Dave

I'm sure the GPS is transmitting a bunch of trash that is
being picked up by the wireless receiver. I have the same
problem with my heart rate monitor when I ride under high
voltage power lines or noisy transformers. Try mounting the
GPS further away (I know, handlebars don't lend themselves
to increasing distance). In the winter I use a Minoura Space
Grip to mount the light, GPS and the bike computer at the
same time. It may help (but then there'll be another space
to fill...)

tinyurl.comytnmxOpen ↗

I'm suprised that your GPS is causing that. My e-trex vista
doesn't seem to put out any RFI that I've noticed, and given
Garmin's usual engineering, I would expect more. I guess
making a GPS a commodity item forces some corner cutting...

Eric

(Eric) said:

I'm suprised that your GPS is causing that. My e-trex vista
doesn't seem to put out any RFI that I've noticed, and
given Garmin's usual engineering, I would expect more. I
guess making a GPS a commodity item forces some corner
cutting...

Both my old Garman Etrex and my new Megellan SporTrack Map
put out RF interference that is plainly audible on the A.M.
band when listening to out of city stations on a headphone
radio located in my shirt pocket, particularly during
daytime when the ground-wave is weak. Holding the GPS units
about three feet away from the A.M. reciever ameliorates,
but does not entirely eliminate this.

Ed

I had the 76S and Cateye wireless 7 - mounted on opp. site
of the handle - so far no prob.

(Hmm - maybe I will do test it on flat road and check dist.
recorded...)

"David" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

As per the the title, I have the Garmin 60C and Cateye
mounted next to each other on my bike handlebar, and
whenever the GPS is switched on the Cateye goes bezerk and
records about half the pulses it should. No idea why this
happens, and I suppose the cycle computer is almost
redundant, but thought you'd like to know... Dave

All GPS units put out RFI, but the newer units tend to have
faster ciruit with higher clock rates - which means more
interference in the consumer FR bands (AM/FM/TV/Phone). I
believe all the garmin units carry have an FCC & CE mark.
So, they have been designed to a comply with regulatory
requirments for RFI. But those specs aren't ment to prevent
interference between devices placed within inches of each
other. It gets even more difficult when the devices have an
antennae to aid in picking up and nearby noise (componding
the issue).

Here's a little trick. RF travels in a straight line (&
bounces off objects). If you put a metal barrier between the
2 devices, it may stop the interference. A simple experiment
is to grab a piece of aluminum foil and try using it as a
shield between them. If this works, you can probably rig up
a small metal plate and mount it between the two devices. In
this case, the closer the meta to a device, the better the
plate will shield it.

-Skramblr

Quoted message said:

On 6 Jun 2004 07:39:26 -0700, [email hidden]

(Eric) said:

I'm suprised that your GPS is causing that. My e-trex
vista doesn't seem to put out any RFI that I've noticed,
and given Garmin's usual engineering, I would expect
more. I guess making a GPS a commodity item forces some
corner cutting...

Skramblr [email hidden] opined the following...

Quoted message said:

All GPS units put out RFI, but the newer units tend to
have faster ciruit with higher clock rates - which means
more interference in the consumer FR bands
(AM/FM/TV/Phone). I believe all the garmin units carry
have an FCC & CE mark. So, they have been designed to a
comply with regulatory requirments for RFI. But those
specs aren't ment to prevent interference between devices
placed within inches of each other. It gets even more
difficult when the devices have an antennae to aid in
picking up and nearby noise (componding the issue).

Here's a little trick. RF travels in a straight line (&
bounces off objects). If you put a metal barrier between
the 2 devices, it may stop the interference. A simple
experiment is to grab a piece of aluminum foil and try
using it as a shield between them. If this works, you can
probably rig up a small metal plate and mount it between
the two devices. In this case, the closer the meta to a
device, the better the plate will shield it.

Will be even more effective if earthed... consider leaving a
trailing copper lead attached to it, which will brush the
floor when travelling. ;-)

Jon

I had the same problem with a 60C and a VDO 10+ wireless... This is indeed
something to watch out for as we add more and more gadgets on the handlebar 🙂

David said:

As per the the title, I have the Garmin 60C and Cateye
mounted next to each other on my bike handlebar, and
whenever the GPS is switched on the Cateye goes bezerk and
records about half the pulses it should. No idea why this
happens, and I suppose the cycle computer is almost
redundant, but thought you'd like to know... Dave

David said:

As per the the title, I have the Garmin 60C and Cateye
mounted next to each other on my bike handlebar, and
whenever the GPS is switched on the Cateye goes bezerk and
records about half the pulses it should.

My CatEye white LED front light (backup use only) in
flashing mode interferes with my VDO Cytec C10+ computer,
meaning I can average 30mph+ without moving...

--
Mark,

In article <[email hidden]>,
[email hidden] says...

Quoted message said:

David said:

As per the the title, I have the Garmin 60C and Cateye
mounted next to each other on my bike handlebar, and
whenever the GPS is switched on the Cateye goes bezerk
and records about half the pulses it should.

My CatEye white LED front light (backup use only) in
flashing mode interferes with my VDO Cytec C10+ computer,
meaning I can average 30mph+ without moving...

Does the VDO device have a CE mark? If so, it might be in
violation of certain EMC guidelines.

--Gene