User’s Manual ASA-3-460M
1. DESCRIPTION The ASA-3 module is a switched preamplifier and variable power amplifier. It is similar to the ASA-2 module and operates for all intents and purposes, in an identical manner except for yielding higher (and variable) RF output power. The ASA-3-460M contains a SAW filter and LNA in the receive signal path and serves as a switched preamplifier/power amplifier, boosting both transmitted and received signals. The version of the amplifier works with Hetronic RF modules from 450MHz to 470MHz.
. ASSEMBLY DESCRIPTION 3.1. Test / Programming Jumper Configuration N/A – no firmware/software required for operation. 3.2. Operational Jumper Configuration 3.2.1. Default For standard ASA-3-460M modules, only J2 should be shorted. This limits the output power to 100mW, when supplied with a 10dBm input. J3 and J4 should not be shorted. In most common configurations, the switch line is driven by either the module or LFB board. 3.2.2. Possible Jumper Configurations 3.2.2.1.
. Connection Diagram 4.1. Internal Connections The below wiring connections must extend from the bottom side of the board. V+ - Positive power Supply Switch – Rx (LNA)/Tx (PA) select GND – Negative power supply Figure 1, Wire Attachment, bottom view. Wiring must extend from the bottom side. 4.2. External Connector These external, RF connections are shown below in Figure 2. Antenna Connector – TNC, standard polarity.
Figure 2, External RF connector placement, bottom side of PCB shown
