15
Remove the two Pozi-Drive screws from the back of the SP-A
hub (A), turn it over with the label side up and carefully lift off
the lid. NOTE you should lightly press down on wires and front
panel while carefully lifting the lid off. This then reveals the
white 9 pin AUX connector on the main circuit board (B).
Carefully break off the blanking tab from inside the lid (C),
which previously covered the slot in the front panel. Then
orientate the interface lead’s white connector so that the
exposed crimp side of the connector faces forward as per picture
(D). Carefully align and press the connector plug into the white
9 pin Aux connector.
Carefully position the interface lead around the back of the
nearby black fixing pillar and push the interface lead into the
front panel slot.
Before replacing the lid, push the wires down so that they will not
be trapped between the black pillar and lid when it is replaced.
With the lid on and in place, check alignment around the front
panel etc before replacing the two Pozi-Drive screws (A).
Connect the interface leads plug to the radio, making sure it is fully
plugged all the way in (fit the retaining clamp if one is provided
with the radio) and turn the radio on to about 50% volume (E).
Count to 20 into your microphone and activate your VOX (your
own side-tone confirms this for you) the other radio should
receive your speech and they can then adjust their hand held
radios volume to a suitable level.
Please use this setting as a
guide to set the volume on the radio connected to your hub,
BEFORE getting the other person to transmit back to you using
their hand held radio, and then when they transmit back to you,
you can readjust your radios volume if required.
You will notice two important things happening
which you
have to understand and get used to working with in order to
perfect using the system.
1) When you speak and activate your VOX it instantly switches
on (as confirmed by your own side-tone) and the VOX
simultaneously switches your bike to bike radio from receive
mode (or standby) into transmit mode. (If your radio has a
transmit LED or indicator you will notice this activates
almost instantly when you speak and operate your VOX)
There is unfortunately a short delay
between when this
happens and when your speech is actually heard through the
other radios speaker. This is because after receiving your
transmission, the other radio has to switch between battery
saving/standby mode into receive mode and then check and
except the anti-interference tone code before allowing the
sound to be amplified through the speaker. The result of this
short delay is that when you say something like “
left at the
lights
” it may be heard as “
at the lights
” to which the reply
is “
what about at the lights
”, which is heard as “
about at
the lights
”, I think you get the message (which is that you
won’t) so to get over this you must get used to always using
a
KEY WORD
, (like you will hear professionals such as the
police use) for example; “
OK… turn left at the lights,
OVER
” this key word and a short pause will ensure that your
intended radio transmissions are heard in full, likewise by
saying the word OVER allows the other person to know you
have ended your communication and after a second or two
your VOX will then switch your radio from transmit back to
receive, so that they can then speak back to you.
2) When you stop speaking there is a (deliberately designed)
short delay before your VOX switches the radio back from
transmit mode to receive mode. This delay is the
best
compromise
between;
staying on as long as possible
to
help prevent any pauses during normal conversations
causing the system to think you have stopped speaking and
returning the radio back to receive mode halfway through
your conversations and;
as short as possible
so that when
you do actually stop speaking, the delay time for your radio
to stop transmitting and return to receive mode is minimal,
so that the other bike/s can then transmit back to you as
quickly as possible.
It is often very beneficial to have an experienced third person
(with radio) about to monitor your first bike to bike use, so that
they can listen for any mistakes either of you make and help
guide you with proper use. They will also be able to hear if
anyone is transmitting any electrical interference and help
identify which bike is the cause, and so help speed up any fault
finding processes.
Please note; that when two metallic objects are struck (or
rubbed) together near to a transmitting radio, it can sometimes
induce a electrical interference that is transmitted to the
receiving radio. If you hear any interference over the bike-to-
bike radios, try removing your tool kit from the bike and make
sure that your bike drive chain is well lubricated to see if the
interference is eliminated. If replacing the tool kit re-introduces
the interference, it is a good idea to individually wrap each tool
in cling film etc. to stop them rattling together while riding.
CONNECTING A BIKE-TO-BIKE RADIO TO YOUR SYSTEM
A
B
D
C
E
Blanking tab on lid
White 9 pin Aux connector
Pozi-drive screws
Super Pro Auto Instructions 8/5/09 2:24 pm Page 15
