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Teletest Ltd, 4 Shelley Road, Bournemouth, Dorset, BH1 4HY, UK
Tel: 01202 646100 • Fax: 01202 646101 • Intl: +44 1202 etc sales-uk@teletest.net
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Technical Support: Analogue radio link
99.9% of ALL reported problems are caused by a FLAT BATTERY or the ANTENNA not connected!!!! Problems caused by finger trouble are much rarer as these products are very simple.
We can sort almost all problems out over the phone; try following the Q & A below and if you are having no luck then give us a call.
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POWERING THE TRANSMITTER
Q: Can I power my transmitter from the 4pin Hirose radio-mike transmitter power socket on the back of my camera?
A: Not recommended.
NOTE: Although we supply leads for connecting transmitters to the Hirose socket on a camera, many cameras cannot provide enough power and the fuse will blow in the camera.
This fuse usually costs about £100 ex VAT to replace and your supplier will often make a modification so that it never happens again.
Please see the seoparate FAQ sheets (listed with the transmitter) which explains, as far as e know the options with different types of cameras.
NO IMAGE
Q: Why do I have no picture on my monitor?
A: Ensure the power is on.
A: (OZL7000) You do not have the 2.4GHz receiver option. This LCD monitor can be upgraded.
A: (OZL7007 / OZL7008) Ensure you have selected the correct input on the switch on th front, marked RX.
A: (OZE3100 / OZE3200 / OZE3202) Ensure the power switch on this expansion box is set to the correct position.
A: (OZE3100 / OZE3200 / OZE3202) Ensure the cable is in the Expansion socket and the "B input" selection switch is in the correct place on the rear of the LCD monitor.
Q: Why do I only have interference on my LCD screen?
A: Ensure an antenna is firmly connected and is not broken.
A: Ensure the transmitter is on.
A: Ensure both the transmitter and reciever are on the same channel by checking the piano switches.
Q: I know I am receiving a picture, as I see slight signal break up as I move around, but why don't I have an image?
A: Ensure there is a picture coming down the cable to the transmitter.
A: (OZE3210 / OZE3219) Ensure the PAL/NTSC or SDI slide switch on the transmitter is in the correct position.
Q: Why do I have an image appearing intermittantly?
A: Check that only one channel is selected on the receiver's piano switch, otherwise it is in "channel scan mode".
SIGNAL BREAK UP
Q: Why does the signal break up only slightly when I move around?
A: This is normal as the wavelength of a 2.4Ghz is a microwave signal is very small and is prone to do this.
A: There may be obstructions to the signal's path eg cars and people moving between the transmitter and receiver.
Q: Why does the signal break up noticably when I move around?
A: Ensure the antenna is not being shielded by other equipment (ie blocking the signal path).
A: Ensure the antennas on the transmitter and receiver are in the same plane ie vertically or horizontally, not both.
A: Ensure there are no major obstructions (a big building, thick walls etc).
A: (OZE3210 / OZE3219) If the units are far away from each other, ensure the 17dB attenuator is fitted between the transmitter antenna socket and the antenna as the signal is too powerful.
A: If the units are far away from each other, move the transmitter nearer to the receiver.
A: (OZE3210 / OZE3219) If the units are far away from each other, remove the 17dB attenuator on transmitter*.
A: If the units are far away from each other, use an optional hi-gain antenna*.
*Check the licencing regulations in country of use.
Q: Why does the signal break up a lot, so much so that it is unusauble?
A: If the room is made of a metal structure, the signal will be absorbed and reflected! There is nothing you can do in such a circumstance, sorry!
A: Ensure the correct antenna is firmly connected and is not broken.
NOTE: You must use 2.4GHz antennas supplied by Teletest.
Other antennas such as radio mike antennas will not work and WILL DEFINITELY DAMAGE your transmitter.
NOTE: 2.4GHz signals bounce off surfaces such as walls, ceilings, desks, even people!
So, if the receiver or the transmitter moves there is a chance that a reflected signal will interfere with the transmitted signal and cause the image to break up for a split second. Simply move the unit slightly to get a better signal.
This frequency is really designed for use in static environments eg the transmitter is next to a domestic video recorder and the receiver is next to a TV upstairs in a house.
SUGGESTION: Such signal break up generally only happens when the transmitter is quite far away or in another room. Be realistic about the working environment of these units. Most broadcast applications usually have the director in sight and earshot of the cameraman and as such, get practically no signal break up.
INTERFERENCE
Q: Why does the transmitter and receiver work fine in one room and then not in another?
A: Check to see if the other room has electronic equipment in it and if possible, turn them off.
A: Change to one of the other 4 channels.
NOTE: Computers, faxes, monitors, remote CCTV cameras, wireless broadband hubs etc all give off electromagnetic radiation that can interfere with the signal.
For example, the speed of a Pentium processor is approximately the same frequency as a the 2.4GHz signal!
For example, a wireless broadband link uses exactly the same 2.4GHz frequency.
SDI AND RADIO LINKS
Q: Why won't my OZE3210 display SDI signals?
A: Because only the OZE3219 has an SDI decoder board in it and can accept SDI inputs.
A: If you have an OZE3210, you can easily upgrade it to a OZE3219 - please contact Teletest Tech Support.
WHY USE 2.4GHz AT ALL?!!!!
In 90% of all broadcast applications, the signal is excellent and a perfectly good choice.
However, we are limited by regulations. All governments around the World decided to free up some radio spectrum for licence exempt use by the general public for, eg sending TV pictures or wireless broadband connections to other parts of their house.
There are lower frequencies available for professional use, but these require a separate licence by the user every time they use the equipment.
Also, Teletest as a manufacturer would not be able to design and make products for such a specialised and niche market at the same low cost we do now.
However, by using the equipment realistically (ie not too far away and in the same room) then you will have an excellent broadcast tool that is used by many thousands around the World.