Hetronic PA1 Wireless Amplifier Module User Manual PA 1

Hetronic International Inc Wireless Amplifier Module PA 1

Users Manual

Revision Modified Checked Module Name Date By Date By PA-1 Description In-Line, Bi-Directional RF switching module for 420 to 475MHz. PA-1 includes a 120mW RF Power Amplifier for the transmit direction and a SAW filter with LNA for the receive direction. Remarks Item Number 52450041 PA-1 User Manual CONFIDENTIAL
1. TABLE OF CONTENTS 1.TABLE OF CONTENTS ................................................................................................................................ 22.PROJECT DESCRIPTION ............................................................................................................................. 33.TECHNICAL SPECIFICATION .................................................................................................................... 44.FUNCTIONAL DESCRIPTION ..................................................................................................................... 45.PCB .................................................................................................................................................................. 5 TABLE OF FIGURES Figure 1, PA-1 PCB Layers .................................................................................................................................... 5Figure 2, PA-1 Top Components (left); Bottom Components (right) .................................................................... 6 CONFIDENTIAL
2. PROJECT DESCRIPTION PA-1 is an in-line, Bi-Directional RF switching module for 420 to 475MHz. It includes a 120mW RF Power Amplifier for the transmit direction and a SAW filter with LNA for the receive direction. In addition to the item number, check-boxes are provided to indicate power output level. When the Control Input line is low (typically below 1V), the module is in Receive Mode. When the Control Input is high (typically above 1.2V), the module is in Transmit Mode. The PA-1 typically operates from a 5Vdc supply or battery voltage down to 3.5Vdc. Test Pad PD is a Power Detector output that provides an analog voltage that is proportional to the transmit output power. FCC ID: LW9-PA1 IC ID: 2119B-PA1 Note: Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. Note: The user is cautioned that changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. Note: The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20cm from all persons. The antenna(s) used for this transmitter must not transmit simultaneously with any other antenna or transmitter, except in accordance with FCC and IC multi-transmitter product procedures. Note: Under Industry Canada regulations, this radio transmitter may only operate using an antenna of the same type and equal or lesser gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication. Remarque : L'opération est soumis à deux conditions suivantes: (1) ce dispositif ne peut pas causer de brouillage, et (2) ce dispositif doit accepter toute interférence, y compris le brouillage qui peut causer intempestif de fonctionnement du dispositif. Remarque : L'utilisateur est averti que les changements ou modifications non expressément approuvées par la partie responsable de la conformité pouvaient annuler l'autorisation l'utilisateur à faire fonctionner l'équipement. Remarque : L'utilisation utilisée pour cet émetteur doit être installée pour fournir une distance de séparation d'au moins 20 cm de toutes les personnes. L'utilisation utilisée pour cet émetteur ne doit pas transmettre simultanément avec une autre antenne ou émetteur, sauf conformément aux procédures de produits multi-transmitter de FAC et IC. CONFIDENTIAL
3. TECHNICAL SPECIFICATION Parameter Min. Typ. Max. Unit Notes Supply Voltage 3.5 4.0 6.0 Vdc Supply Current TX 120mW 180±10% mA 50 ohm load Supply Current RX 1.0 mA TX Frequency Range 420 475 MHz RX Frequency Range 450 472 MHz Limited by Rx SAW filter. RF Output Power 19 20.8 dBm 10dBm input RF Receive Signal Gain 20±10% dB Switching Time RX to TX 0.5 mS Switching Time TX to RX 0.3 mS Control Input High 1.2 12.0 Vdc TX Mode Control Input Low -2.0 1.0 Vdc RX Mode Operating Temperature -30º 85º C 4. FUNCTIONAL DESCRIPTION 4.1. Operation When the logic level on the Control Input line is low (typically below 1V), the module is in receive mode. The RF switches are configured to route the incoming RF signal from the antenna through a SAW filter and Low Noise Amplifier (LNA) for increased sensitivity. The SAW filter allows only in-band signals to pass, therefore out of band interference is reduced significantly. SAW filters may be changed to accommodate frequencies within the TX frequency range other than 450 to 472 MHz, or omitted in favor of external band pass filters. Aside from boosting the incoming signal, the LNA’s amplification helps to offset the signal loss from the SAW filter and lengths of cable. The amplified signal is connected to the RF module via the onboard SMB connector marked X2. When the logic level on the Control Input line is high (typically above 1.2V), the module is in transmit mode. The RF switches are configured to route the transmitted signal from the RF module to the PA-1 Power Amplifier. The Power Amplifier boosts the transmitted signal power. After the PA, the amplified signal is fed through a Low Pass Filter to suppress harmonics. The amplified signal is then fed to the antenna via the onboard SMB connector marked ANT. Test Pad PD is a Power Detector output that provides an analog voltage proportional to the transmit output power. Solder Jumper UP DOWN Closed 11KΩ pull-up to +3.3Vdc 9KΩ pull-down to Ground Open Default, 100K pull-down CONFIDENTIAL
5. PCB 5.1. PCB Layers Figure 1, PA-1 PCB Layers CONFIDENTIAL
5.2. Component Placement Figure 2, PA-1 Top Components (left); Bottom Components (right) CONFIDENTIAL

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