Overview
The LA1061M is an antenna switching controller for mobile radio equipment. The LA1061M uses a number of inputs from the receiver circuitry to select the main antenna or sub-antenna according to signal strength and quality. Weak and strong signals are detected with the S-meter DC voltage and F.E. AGC voltage, respectively. Multi-path distortion is detected from the AC component of the IF output, using the same high-sensitivity counter circuit as in Sanyo's earlier LA1060 device. An auxiliary circuit keeps the main antenna selected for a fixed time period when reception conditions outside a moving vehicle are changing rapidly.

FEATUREs
• Uses Sanyo's proprietary AGC amplifier and detector, providing accurate detection of multi-path distortion.
• High-current Main and Sub-antenna switching outputs.
• Antenna switching frequency limiting circuit.
• On-board comparators for F.E AGC (strong signal) and S-meter DC (weak signal) detection.
• Surface-mount 14-pin MFP.