Trident Raider, Инструкция по установке и эксплуатации, Страница: 56 / 94

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Raider Installation and Operation Rev. 1.4.2
APPENDIX E
External RDD and an Auxiliary Receiver
When using the external RDD feature in the Raider controller with an external auxiliary receiver,
certain conditions must be observed for proper operation.
Configuration:
1. The carrier only feature in the system parameters must be programmed with a value of “1”.
2. RDD Act Time in the system parameters must be set to enable RDD.
Connection:
1. The W1 jumper on the Raider board must be set to the “E” (external) position.
2. Construct the interface cable as shown in figure 1.
NOTE:
A logic low must be seen at pin 2 of the DB-25 radio connector to start the RDD Activate
timer. This input is diode isolated and internally pulled up to the 5 volt line, so receivers with open
drain or collector outputs may be used without modification. It is important that the auxiliary
receiver provide a logic low when the co-channel carrier is detected and must remain low until the
carrier goes away. If you wish to detect specific CTCSS or DCS codes, then it is important that the
auxiliary receiver can be programmed with all tones or codes that are to be detected and, only then,
provide the logic low output for the entire time these codes or tones are present. No momentary
or pulsed outputs may be used with the external RDD input.
3. Construct the interface cable as shown in figure 2. ONLY if the following conditions exists:
a. The auxiliary receiver is programmed to detect CTCSS and/or DCS codes from the
co-channel repeater.
b. The Raider has valid CTCSS or DCS users on it.
IMPORTANT!!
If the diode jumper between pin 2 and 20 of the DB-25 radio connector is omitted,
the conventional users will be unable to use the controller even though they have been programmed
as valid in the user database.