Instruction manual

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VOX

VOX or voice activation, gives you several advantages. Apart from turning the microphones off when you are not speaking,

ensuring no noise is picked up and amplified to the users ears, the VOX can automatically mute the music or make your

transceiver transmit when you speak, giving you hands free and safer operation.

If you are going to be using a passenger headset then you should do

so when setting the VOX, as the passenger typically get far more

helmet noise that the rider.

If you start with the VOX control set to the centre position per the

illustration below and go for a ride to see if the helmet noise at speed

false triggers the VOX. If it does then slightly turn the VOX control

knob clockwise say about

⁄8 of a turn at a time and try it again and

keep doing this until you have set the VOX such that helmet noise

does not accidentally turn it on at speed when you are not speaking.

Top Tip

It is a good idea to set the VOX about 20mph (32kmh) faster than you

would normally travel so that head winds do not cause it to false

trigger. If your helmet has chin bar vents that allow air to blow

straight through onto or near the back of the microphone area then

this should be blocked off from the inside of the chin bar such that (1) you do not get direct wind blast to the back of the

microphone/s and (2) because in most cases this also helps to get more air up into the visor area, which can often help with

demisting problems.

Incorrect VOX setting will cause the music to keep muting and/or bike to bike transceiver to keep transmitting when not

speaking and this would prevent you from being able to receive and this is why a correctly set VOX is very important and why

you must find and use the LOUD SPOT rather than reduce the VOX level to compensate.

A wind/draft excluder is sometimes fitted under the chin bar of some helmets and this can help reduce excessive wind noise

thus allowing for a lower VOX setting.

Although it seems simple, and it can be, there are a few tricks to help you get the most out of you transceivers, which should

be set up as per their instructions including being fully charged and connected properly via the appropriate interface lead.

Ensure that the radios are not in VOX mode. Practice some radio discipline - turn the radios on, plug one of the radios into the

Active-PLUS unit and get someone else to use the second radio as a hand held unit and talk back to you using the push-to-

talk button on the side of the radio. Remember the radio’s are simplex which means only one person can talk at a time. Ideally

having a third transceiver can help by letting you hear any problems and who is causing them.

Autocom’s VOX system is almost instant and between rider and passenger if you said “don’t turn left” you would both hear

“don’t turn left” without clipping, but it should be noted that when communicating between bike-to-bike using a simplex

transceivers you will get a short delay before the transceiver transmits because it has to wake up from standby or receive mode

and only after it has transmitted its anti interference tone code and the other transceiver receives this and verifies the tone

code is correct can it switch on the received speech for you to hear, and this can take typically about

⁄2 a second or so. As such,

if you said “don’t turn left” it may come over as “urn left”. It is therefore good practise to use a trigger word at the beginning

of each conversation such as “ok, don’t turn left” or “ok, when you get to the lights don’t turn left”, so that the important

part of the message is received. It is also good practice to always say “over” at the end of each conversation so that other

people know that you have finished speaking and they can speak back. However, it should also be noted that the VOX is

deliberately designed to hold on for a short period when you stop speaking and this is to allow for any short pauses during

normal speech so that it does not keep tripping off when your are speaking. The delay is a compromise between being too

short and so causing clipping when speaking, and turning off as quickly as possible so that when you have finished speaking

others can speak back with minimum delay time. The amount of your voice energy will slightly effect the delay time after you

finish speaking so if your last work is loud it will hold the VOX on slightly longer than if your last work is soft and you can use

this to your advantage.

SETTING THE VOX CONTROL

USING BIKE-TO-BIKE TRANSCEIVERS