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C A I R O |
Talk-Through Relays |
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INSTALLATION INSTRUCTIONS FOR MANNING OPERATORS |
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C A I R O |
Talk-Through Relays |
|
INSTALLATION INSTRUCTIONS FOR MANNING OPERATORS |
Hardware:
C8-TTU : the (smaller) modules with one thick tail (DIN-8 plug) and one thin tail (DIN-5 plug).
C-TTU : the (larger) modules with two thin tails (DIN-5 plugs) and a 12V power tail.
Link-Tail : the tail (DIN-5 plug) which emerges close by the CAIRO (DIN-7) socket.
Rig-Tail : the tail which emerges at the opposite side; the thick (DIN-8 plug) tail of a C8-TTU.
Configurations:
£ For Cross-Band Relay (XR), single vehicle (V1) with two rigs, follow £ instructions only £
@ For Cross-Band Relay (XR), two vehicles (V2), one rig in each, follow @ instructions only @
% For In-Band Relay (IR), two separate rigs in each vehicle, follow % instructions only %
$ For In-Band (IR) 'half' Relay with a Dual-Band rig, follow $ instructions only $
Set-up Procedures: |
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-XR- |
-IR- |
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-V1- |
-V2- |
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£ |
@ |
% |
$ |
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£ |
@ |
% |
$ |
Study (enclosed) site-plan, or survey site to determine safe parking place(s) |
@ |
% |
$ |
Meet your fellow operator and ensure that you each have appropriate transceiver(s) | |
@ |
% |
$ |
Read through appropriate instruction sequence(s) together and select equipment | |
£ |
@ |
% |
$ |
If in doubt, also study configuration diagrams in the CAIRO Application Manual - G8CQH |
£ |
Identify your 70cms rig and set to low Tx power | |||
@ |
Set your rig to low Tx power | |||
% |
Identify which rig is to be the Receiver of your 'half' of the Relay; the Rx-Rig | |||
£ |
@ |
% |
$ |
Leave this rig connected to your existing mobile aerial, at this stage |
£ |
@ |
% |
$ |
Select a TTU, either C or C-8 to suit your rig's interface, and plug in Rig-Tail |
£ |
@ |
% |
$ |
If C8-TTU is used (with CAIRO-8 host rig) ignore steps relating to rig adjusting |
£ |
@ |
% |
$ |
(C8-TTU only) Power LED should be ON |
£ |
@ |
% |
$ |
(C-TTU only) Plug the 12V power tail into your 12V supply provision |
£ |
@ |
% |
$ |
(C-TTU only) Tune rig (Rx) to a clear frequency, near designated operations frequency |
£ |
@ |
% |
$ |
(C-TTU only) Turn the rig's Volume and Squelch controls to minimum settings (LED ON) |
£ |
@ |
% |
$ |
(C-TTU only) Slowly increase the rig's Volume control until the LED extinguishes |
£ |
@ |
% |
$ |
Re-tune rig (Rx) to designated operations frequency (and lock VFO if possible) |
% |
Identify the transceiver which is to be your Tx-Rig of the 'half' Relay | |||
% |
Leave this rig connected to your existing mobile aerial, at this stage | |||
£ |
Identify your 2m rig and set it to low Tx power | |||
£ |
Plug in a TTU of appropriate kind (C or C-8) and repeat £-procedures for this rig | |||
% |
$ |
Tune Tx-Rig (Tx section) to designated operations frequency (and lock VFO if possible) | ||
% |
$ |
If Tx-Rig is Relay Output set to high Tx power, else if Link output, set to low Tx power | ||
$ |
Plug TTU Link-Tail directly into the TTU DIN socket - a self-loop connection | |||
% |
Plug TTU Link-Tail into Tx-Rig's CAIRO adaptor | |||
£ |
Plug each TTU Link-Tail into other TTU DIN socket - a cross-coupling - Rig to 'Duplex' | |||
£ |
@ |
% |
$ |
Ensure that Rig(s) is well ventilated; Tx-Rigs may be subject to a high duty cycle |
@ |
% |
$ |
Wait for your fellow operator to finish his set-up procedure | |
@ |
Using two CAIRO Orange-Reels, link your TTU
Link-Tail to the DIN socket of your fellow operator's
TTU, and his Link-Tail to your TTU socket - a cross-coupling |
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£ |
@ |
% |
$ |
Switch TTU(s) from Set to Relay |
@ |
% |
$ |
Check talk-through by working each other on hand-helds, say | |
£ |
Check talk-through by working Control (or a nearby outstation) using a hand-held, say | |||
£ |
@ |
% |
$ |
(C-TTU) If through-audio is 'harsh' reduce Rx volume slightly, if 'thin' raise it slightly |
% |
$ |
Agree an 'engineering' frequency, in same band as the link frequency, NOT the Relay band | ||
% |
$ |
Drive vehicles to separation parking : 1 mile for 2m ; 1/3rd mile for 70cms | ||
£ |
@ |
Set Tx-Rig(s) to high Tx power | ||
£ |
@ |
% |
$ |
Advise Net Control or outstations that the Relay is operational |
% |
(C8-TTU) Plug CAIRO dual-ear headset into TTU DIN socket, for monitoring listening | |||
£ |
@ |
% |
$ |
Monitor and maintain Relay service, erecting portable mast and aerial(s) if necessary |
£ |
@ |
% |
$ |
Run vehicle engine, from time to time, to maintain battery charge |
£ |
@ |
% |
$ |
Do not disable the Talk-Through (without the consent of Net Control) |
£ |
% |
$ |
Advise Net Control if you need to leave your vehicle for some time (e.g. refreshments, "comfort") | |
