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LMT1-173-10 Datasheet(PDF) 9 Page - Radiometrix Ltd |
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LMT1-173-10 Datasheet(HTML) 9 Page - Radiometrix Ltd |
9 / 10 page Radiometrix Ltd LMT1/LMR1 Data Sheet page 9 The antenna choice and position directly controls the system range. Keep it clear of other metal in the system, particularly the 'hot' end. The best position by far, is sticking out the top of the product. This is often not desirable for practical/ergonomic reasons thus a compromise may need to be reached. If an internal antenna must be used, try to keep it away from other metal components, particularly large ones like transformers, batteries and PCB tracks/earth plane. The space around the antenna is as important as the antenna itself. Helical antenna R F Loop antenna RF GND RF C tune C match capacitors may be variable or fixed (values depend on loop dimensions) track width = 1mm min. area 500mm 2 Whip antenna 410mm @ 173MHz R F wire, rod, PCB track or a combination of these length(mm) = 71250 / freq(MHz) trim wire length or expand coil for best results 35-40 turns wire spring length 120mm, dia 10mm Ordering Information: Ordering Information: Ordering Information: Ordering Information: Part No. Part No. Part No. Part No. Description Description Description Description Frequency band Frequency band Frequency band Frequency band (MHz) (MHz) (MHz) (MHz) RF power RF power RF power RF power (mW) (mW) (mW) (mW) Channel spacing Channel spacing Channel spacing Channel spacing (kHz) (kHz) (kHz) (kHz) Data rate Data rate Data rate Data rate kbps kbps kbps kbps LMT1-173-5 Transmitter 173.225 - 173.325 10 25 5 LMR1-173-5 Receiver 173.225 - 173.325 25 5 LMT1-151-5 Transmitter 150.825 - 152.450 100 25 5 LMR1-151-5 Receiver 150.825 - 152.450 25 5 LMT1-173-5-12k5 Transmitter 173.225 - 173.325 10 12.5 5 LMR1-173-5-12k5 Receiver 173.225 - 173.325 12.5 5 LMT1-151-5-12k5 Transmitter 150.825 - 152.450 100 12.5 5 LMR1-151-5-12k5 Receiver 150.825 - 152.450 12.5 5 LMT1-173-10 Transmitter 173.225 - 173.325 10 25 10 LMR1-173-10 Receiver 173.225 - 173.325 25 10 LMT1-xxx-5 10/100 25 5 LMR1-xxx-5 Where xxx is any 2MHz band from 130MHz to-180MHz 25 5 Figure 7: Antenna types |
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