RESEARCH CONCEPTS RC3000 Especificações descarregar pdf (Página 6)

The range of analog voltages accepted by the RC3000 is –15 VDC to + 15 VDC. The analog voltages can be generated

either by a beacon receiver or by an AGC (Automatic Gain Control) circuit in a modem or analog receiver. The RC3000 can

accept signal strength inputs of either polarity. In this context positive polarity means that the output voltage increases as

the received satellite signal increases. Negative polarity refers to the case where the output voltage decreases as the

satellite signal increases.

To minimize noise pickup, a shielded cable (with two conductors) such as Alpha 1292C should be used to connect the

source of the signal strength output to the RC3000. Note that the cable shield should be open at either the RC3000 or at the

source of the signal.

Associated with each analog input is a gain and offset potentiometer. These pots level shift and either expand or reduce the

analog input’s dynamic range to match the controller’s A/D conversion range (0 to 5 volts). The offset potentiometers

generate a pair of offset voltages that determines the level shift applied to each of the signal strength inputs. These offset

voltages are available on connector J2 to facilitate adjustment of the gain and offset potentiometers.

Accessory Connector

Connector J8 (9 conductor – Amphenol 126-221 type) provides access to the following circuits …

1. HPA (High Power Amplifier) Disable is a form C contact arrangement with normally open, common, and normally closed

contacts. When the antenna is below the down elevation limit or the antenna is performing any large-scale auto-moves

such as deploy, locate, or stow, the normally-open and common pins will be connected. For antenna’s that employ

electro-mechanical brakes the HPA disable feature is not enabled. Please contact the factory for details.

2. Alarm Out is a normally closed relay. These contacts will be closed whenever the controller is powered down or an

alarm condition has been detected. For antenna’s that employ electro-mechanical brakes the Alarm Out feature is

disabled. Please contact the factory for details.

3. GPS 1 Pulse per Second Output is a TTL square wave output (referenced to the chassis ground connection). This

output is only available if the controller is equipped with a Garmin model 36 GPS receiver. Note that the RC3000GPS

option does not include the Garmin model 36 receiver. Contact the factory for availability of the model 36 receiver.

4. GPS Instant On Feature – The GPS Instant On feature is realized by powering the GPS receiver while the vehicle is in

motion. This allows the receiver to lock to the GPS satellite signals while it is in transit. The vehicle latitude/longitude

(lat/lon) will be available as soon as the vehicle reaches the uplink location. Without the Instant On feature, after power

up the GPS requires 2 to 4 minutes to determine vehicle lat/lon. With the Instant On feature, the controller applies

vehicle power to the GPS whenever the vehicle ignition system is energized and for approximately 30 minutes after the

vehicle’s ignition system is de-energized.

The GPS Instant On feature requires a direct connection to the vehicle +12V battery, a connection to the +12V vehicle

accessory voltage (+12V on while the vehicle ignition system is on), and a connection to the vehicle’s chassis ground.

When the GPS Instant On feature is active, power is routed to ports 1, 3, and 4 of the navigation sensor connector, J9.

To enable the Instant On feature, diodes D31 and D29 must be installed on the RC3000 feature board.

Support for electro-mechanical brakes on the azimuth and elevation axis can be provided via the J8 connector. This port can

also provide access to an unregulated power supply or other user specified features. Please contact the factory for more

information.

The following table shows the pin connections for J8 on the RC3000.

J8 Pin # Description

A HPA Disable, normally-open, 3A @ 30VDC max or 3A @ 250VAC max

B +12 - +14V Vehicle Battery input (OR +Vunreg. for auxiliary output models, 2A max)

C Ground, Vehicle chassis ground input.

D HPA Disable, common, 3A @ 30VDC max or 3A @ 250VAC max

E HPA Disable, normally-closed, 3A @ 30VDC max or 3A @ 250VAC max

F Alarm common, 3A @ 30VDC max or 3A @ 250VAC max

G Alarm normally-closed, 3A @ 30VDC max or 3A @ 250VAC max

H +12 to +14V Vehicle accessory input (Vunreg. Return for auxiliary output models)

1 2 3 4 5 6 7 8 9 10 11 ... 16 17

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RESEARCH CONCEPTS RC3000 Especificações Página 6

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