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[[Category:Hardware]]
[[Category:Hardware]]
This page discusses interfacing the Motorola Quantar to the RTCM/VOTER interface, for use with AllStar.
{{Infobox PTTLink
| image = Quantar.jpg
| caption = Motorola Quantar Radio
| category = How to
}}
This page discusses interfacing the Motorola Quantar to the [[RTCM Client|RTCM]]/[[VOTER]] interface, for use with AllStar.
=Background=
=Background=
The following links are useful for reference:
The following links are useful for reference:
*[https://wiki.w9cr.net/index.php/Quantar W9CR Quantar Site] Bryan has a LOT of useful and relevant info on his page including manuals and firmware
*[https://wiki.w9cr.net/index.php/Quantar W9CR Quantar Site]<ref name="W9CRWiki">[https://wiki.w9cr.net/index.php/Quantar W9CR Quantar Site]</ref> Bryan has a LOT of useful and relevant info on his page including manuals and firmware
*[http://www.repeater-builder.com/motorola/quantar/quantar-index.html Repeater Builder Quantar Site] Go here for additional documentation
*[http://www.repeater-builder.com/motorola/quantar/quantar-index.html Repeater Builder Quantar Site]<ref name="RepeaterBuilderQuantar1">[http://www.repeater-builder.com/motorola/quantar/quantar-index.html Repeater Builder Quantar Site]</ref> Go here for additional documentation
*[[RTCM_Client | RTCM]] The RTCM page on this site
*[[RTCM_Client | RTCM]] The RTCM page on this site
*[[Radio_Connections#Quantar | Quantar Connections]] The Quantar section on this site
*[[Radio_Connections#Quantar | Quantar Connections]] The Quantar section on this site
The RTCM needs the "smt" version files, the VOTER uses the non-smt version files.
The RTCM needs the "smt" version files, the VOTER uses the non-smt version files.
Firmware is available at [https://github.com/AllStarLink/voter/tree/master/board-firmware Github]. Instructions and the other utility needed are all listed on the [[RTCM_Client | RTCM]] page.
Firmware is available at [https://github.com/PTTLink/voter/tree/master/board-firmware PTTLink Github Repository]<ref name="PTTLink Github Repository">[https://github.com/PTTLink/voter/tree/master/board-firmware PTTLink Github Repository]</ref>. Instructions and the other utility needed are all listed on the [[RTCM_Client | RTCM]] page.
=Wiring/Connections=
=Wiring/Connections=
A good primer on the connections available on the backplane can be found over on [http://www.repeater-builder.com/motorola/quantar/q-interfacing/quantar-interfacing.html Repeater Builder], or dig through the various manuals.
A good primer on the connections available on the backplane can be found over on [http://www.repeater-builder.com/motorola/quantar/q-interfacing/quantar-interfacing.html Repeater Builder]<ref name="RepeaterBuilderQuantar2>[http://www.repeater-builder.com/motorola/quantar/q-interfacing/quantar-interfacing.html Repeater Builder]</ref> , or dig through the various manuals.
It is best to use the "Telco" connector, J17, to make the interface cable. This requires a 50-pin MALE Amphenol connector and 90 degree hood. Carefully solder the connections if you have to, or find your local communications installer buddy with an Amphenol "butterfly" tool to crimp one for you.
It is best to use the "Telco" connector, J17, to make the interface cable. This requires a 50-pin MALE Amphenol connector and 90 degree hood. Carefully solder the connections if you have to, or find your local communications installer buddy with an Amphenol "butterfly" tool to crimp one for you.
As mentioned above, you don't get "true" discriminator audio out of the shelf, but you do get a reasonable facsimile.
As mentioned above, you don't get "true" discriminator audio out of the shelf, but you do get a reasonable facsimile.
If you go dig DEEP in the Quantar Digital-Capable Station Instruction manual, p/n 6881095E05, (on [http://www.repeater-builder.com/motorola/quantar/quantar-index.html Repeater Builder]), and dive in to [http://www.repeater-builder.com/motorola/quantar/qim/part-14-station-configuration.pdf Part 14 - Station Configuration], you will find a section called "Fast Keyup Feature".
If you go dig DEEP in the Quantar Digital-Capable Station Instruction manual, p/n 6881095E05, (on [http://www.repeater-builder.com/motorola/quantar/quantar-index.html Repeater Builder]<ref name="RepeaterBuilderQuantar1"/>), and dive in to [http://www.repeater-builder.com/motorola/quantar/qim/part-14-station-configuration.pdf Part 14 - Station Configuration], you will find a section called "Fast Keyup Feature".
This is where it talks about using Pins 5 and 30 on J17 to get audio in and out of the station, using the "Splatter Filter Connection Configuration". It also talks about using Pin 23 on the MRTI connector for PTT, but ignore that, we'll use the EXT PTT input on J17 instead.
This is where it talks about using Pins 5 and 30 on J17 to get audio in and out of the station, using the "Splatter Filter Connection Configuration". It also talks about using Pin 23 on the MRTI connector for PTT, but ignore that, we'll use the EXT PTT input on J17 instead.
==Prerequisites==
==Prerequisites==
With the configuration above, you should have GPS lock, and the RTCM should be connected to the AllStar Host.
With the configuration above, you should have GPS lock, and the RTCM should be connected to the AllStar/PTTLink Host.
You should have already tuned the pre-selector on the receiver in the station. If not, follow the instructions in the manuals. Pro tip, with the station powered on, look in to the receive port with your return loss bridge, and tune for a null (best match).
You should have already tuned the pre-selector on the receiver in the station. If not, follow the instructions in the manuals. Pro tip, with the station powered on, look in to the receive port with your return loss bridge, and tune for a null (best match).
==AllStar (Asterisk) Alignment==
==AllStar (Asterisk) Alignment==
As mentioned above, we are starting by sending audio through the AllStar host.
As mentioned above, we are starting by sending audio through the AllStar/PTTLink host.
*Send 1kHz @ 3kHz on-channel in to the receiver
*Send 1kHz @ 3kHz on-channel in to the receiver
=Further reading=
=Further reading=
For further reading on the Motorola Quantar visit [https://wiki.w9cr.net/index.php/Quantar W9CR's Motorola Quantar Page]
For further reading on the Motorola Quantar visit [https://wiki.w9cr.net/index.php/Quantar W9CR's Motorola Quantar Page]<ref name="W9CRWiki"/>
=References=
<references />