Becker Avionics
General Description
Scope of Functionality
DV17551.03 Issue 03 June 2020
RCU6512
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1.5 Scope of Functionality
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The RCU6512 is a compact and lightweight device.
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All controls and indicators are on the front panel.
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The equipment connector is at the rear side of the device.
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Installation with four screws (rear panel installation).
The dimensions correspond to the standard instrument diameter of 58 mm (2¼ inch).
Figure 2: RCU6512
Illumination
The illumination of LCD and push buttons can be controlled.
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Direct control from the front panel (through the user menu).
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External control through the dimming input lines.
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With external dimming application the illumination curve (brightness to voltage relation)
is adjustable in configuration setup.
Channel Spacing / Frequency Range
The RCU6512 together with RT6512 is for voice communication between aircraft or between an
aircraft and ground stations using the VHF band between 118.000...155.975 MHz (depends on
RT6512 variant).
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8.33 kHz channel spacing: from 118.000...136.990 MHz.
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25 kHz channel spacing: from 118.000...136.975 MHz.
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25 kHz channel spacing in extended frequency from: 118.000... 136.975...155.975 MHz.
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The RCU6512 operates with all frequency band variants of RT6512 transceiver series.
Memory Channels / Frequency Storage
The RCU is capable to store up to 40 frequencies assigned to channel numbers in two banks.
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20 memories reserved for 25 kHz channels spacing mode.
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20 memories reserved for 8.33/25 kHz channel spacing mode.
The word "frequency" also used in the sense of "channel name", as defined in
EUROCAE, document ED-23C chapter 1.3.2.
In this document the word "memory channel" or "channel" means a memory place
identified by a channel number, where a frequency can be stored for later use.
Squelch Operation
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The squelch (muting) circuit suppresses unwanted audio noise.
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RCU6512 can change between ON/ OFF for squelch function of controlled transceiver.
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Squelch threshold is adjustable through the configuration mode.
