So how do they know?

LighteningCrashes · Post by **LighteningCrashes** » Fri May 06, 2011 9:25 pm

How does the train pick up the up or down line cameras?

Fireguard · Post by **Fireguard** » Fri May 06, 2011 10:01 pm

written_ficton wrote:
Always RX wrote:I had imagined that the cameras would broadcast all the time..but you raise a good point, they may only be triggered as required. I'll keep that in mind.
If they were on all the time, how would they pick up the camera's??? It's not like they have cameras all along the track... or do they?

The DAV cameras are constantly on and recording 24/7

written_ficton · Post by **written_ficton** » Sat May 07, 2011 9:40 am

Fireguard wrote:
written_ficton wrote:
Always RX wrote:I had imagined that the cameras would broadcast all the time..but you raise a good point, they may only be triggered as required. I'll keep that in mind.
If they were on all the time, how would they pick up the camera's??? It's not like they have cameras all along the track... or do they?
The DAV cameras are constantly on and recording 24/7

I know the onboard / station cameras are running 54/7, but the question is, any more camera's

Post by **Infernal** » Thu May 12, 2011 5:56 pm

The DAV Camera's and and in train Station Announcements are triggered by the trains location

Post by **Bonez** » Wed May 25, 2011 7:10 pm

Anyone know a rough frequency for these DAV cameras? I've been searching constantly when trains go by but nothing yet...

It would really help if I could narrow it down to a certain frequency range.

written_ficton · Post by **written_ficton** » Wed May 25, 2011 8:37 pm

Bonez wrote:Anyone know a rough frequency for these DAV cameras? I've been searching constantly when trains go by but nothing yet...

It would really help if I could narrow it down to a certain frequency range.

I am afraid I am unable to help here.

Though on a side note I managed to squeak a peak into an A - Cab this afternoon in Claisebrook. The video they see from the platform is truley amazing.

Anyway, AO11912 can you please take off your lightbar in your signature, it is quite annoying.

Post by **Infernal** » Thu May 26, 2011 5:56 pm

written_ficton wrote:
Anyway, AO11912 can you please take off your lightbar in your signature, it is quite annoying.

No

written_ficton · Post by **written_ficton** » Thu May 26, 2011 6:25 pm

AO11912 wrote:
written_ficton wrote:
Anyway, AO11912 can you please take off your lightbar in your signature, it is quite annoying.
No

Can only ask. With that on your signature, it takes ages to load up when your phone.

gromit · Post by **gromit** » Sat Nov 26, 2011 12:18 pm

They trains use a leaky loop which in essence is a low powered video system using an inefficient antenna (to reduce reception range). The video from the platform cameras are transmitted to the driver and usually fades out just as the train pulls away from the train station.

My mate who is a driver explained it to me and I have been in the driver's cab a number of times and seen it in action. Is it how the driver knows when to close the doors by monitoring passenger movements on the platform.

HTH

doggie015 · Post by **doggie015** » Sun Nov 27, 2011 8:37 am

... Thanks for the necropost there...

Blinky · Post by **Blinky** » Sun Nov 27, 2011 10:10 am

AO11912 wrote:
written_ficton wrote:
Anyway, AO11912 can you please take off your lightbar in your signature, it is quite annoying.
No

If it causes you grief then go to your user control panel and turn off the displaying of signatures.

written_ficton · Post by **written_ficton** » Sun Nov 27, 2011 12:52 pm

Blinky wrote:
AO11912 wrote:
written_ficton wrote:
Anyway, AO11912 can you please take off your lightbar in your signature, it is quite annoying.
No
If it causes you grief then go to your user control panel and turn off the displaying of signatures.

I did not think of that!

Post by **Bonez** » Fri Nov 09, 2012 2:46 pm

Sorry to dig up an old thread, but does anyone know roughly what frequency range I would need to scan around to pick up DAVS?

WA Radio Scanner Users' Group

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