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Campbell Manufacturing R410, RF400, RF415 H-7, miles, miles, to ~22, to 30+, Range from ~9, Range from ~14

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Appendix H. Distance vs. Antenna Gain, Terrain, and Other Factors

Use –107 dBm for Pr, solve for Lp: Lp = 135 dB

Use the 3rd to 4th power tables: Range from ~9 (4th power) to ~22 (3rd power)

miles

Example #2

Base has MaxRad BMOY8905 Yagi, with 50’ of LMR195 cable on a 30’ tower, also a lightening protection device with a VSWR of 1:1.75; remote also has a MaxRad BMOY8905 Yagi with 5’ of LMR195 cable on a 4’ pole. Terrain is mostly flat, with sagebrush. How far can I go?

Pt = 20 dBm

Lt = 50’ x (11.1 dB/100 ft) = 5.55 dB Gt = 9 dBd = 11.15 dBi

Lr = 5’ x (11.1 dB/100 ft) = .55 dB Gr = 9 dBd = 11.15 dBi

Need to include the loss from the surge arrestor: VSWR of 1:1.75 = .34 dB loss

Use –107 dBm for Pr, solve for Lp: Lp = 143 dB

Use the 3rd to 4th power tables: Range from ~14 (4th power) to 30+ (3rd power)

miles

Example #3

You need to run 125’ of cable for the transmitter:

How much loss if I use LMR195 cable?	125’ x (11.1 dB/100’) = 13.9 dB
How much loss if I use LMR400 cable?	125’ x (3.9 dB/100’) = 4.9 dB

If I am using path loss from the 2nd power table, and operating fine at 8 miles with LMR195 cable, how much more range could I expect if I use LMR400 cable (assuming similar terrain)?

13.9 dB – 4.9 dB => 9 dB more link margin

Loss at 8 miles: 114 dB; could tolerate 114 + 9 dB = 123 dB loss =>>> 22 miles (14 miles more)

H-7

Contents

RF400/RF410/RF415 Spread Spectrum Data Radio/Modem Warranty and Assistance – CAUTION – Page RF400 Series Table of Contents Introduction Quick Start Software Setup Troubleshooting D. Advanced Setup Standby Modes E. RF400 Series Port Pin Descriptions Short-Haul Modems H. Distance vs. Antenna Gain, Terrain, and Page Page RF400 Series Spread Spectrum Data Radio/Modems 1. Introduction 2. RF400 Series Specifications 3. Quick Start Step 1 – Set Up Base RF400 Step 2 – Set Up Remote RF400 Step 3 – LoggerNet/PC208W Set-up Step 4 – Connect 4. System Components 4.1 RF400 Series Data Radios 4.1.1 Indicator LEDs 4.1.2 Setup Menu 4.1.3 Networking 4.1.4Error Handling and Retries 4.1.4.2 Number of Retries 4.1.4.3 Number of Time Slots for Random Retry 4.1.4.4 Number of Bytes Transmitted before Delay 4.1.4.5 Sync Timer Setting 4.1.5 Received Signal Strength 4.2Power Supplies The RF400 series radio will sustain damage if the DC Pwr jack voltage ever exceeds Volts 4.3 Serial Cables 4.4 Antennas for the RF400 Series FCC OET Bulletin No. 63 (October 1993) approved antennas Page Page 4.5 Antenna Cables and Surge Protection 4.5.1 Antenna Cables 4.5.2 Electro-staticIssues 4.5.3Antenna Surge Protector Kit 5.Software Setup 5.1Point-to-point 5.2 Point-to-multipoint 5.3 Example Setups 5.3.1Direct PC to RF400 Series Base Station Setup Page 5.3.2Remote Station Setup Page 5.3.3 LoggerNet Configuration 5.3.4PC208W Configuration Page 6. Troubleshooting Page Page Appendix A. Part 15 FCC Compliance Warning Page Appendix B. Setup Menu B-2 B-3 B-4 Appendix C. RF400 Series Address and Address Mask Combined Network/ Radio Addresses C-2 C-3 C-4 Appendix D. Advanced Setup Standby Modes D-2 Appendix E. RF400 Series Port Pin Descriptions CS I/O FUNCTION E-2 Appendix F. Datalogger RS-232Port to RF400 Series Radio Page Appendix G. Short-HaulModems G-2 Appendix H. Distance vs. Antenna Gain, Terrain, and Other Factors Overview Link Analysis Transmitter Power Cable Loss Antenna Gain Receiver Sensitivity Path Loss Real World Distance Estimates Examples Range from ~9 to ~22 miles Range from ~14 to 30+ H-8 Appendix I. Phone to RF400 Series Page 2)AT Command Character: “-” Page Appendix J. Monitor CSAT3 via RF400 Series J-2 J-3 Page Appendix K. RF400/RF410 Pass/Fail Tests TESTING SC12 CABLE and PC COM PORT K-2 TESTING RF400/RF410s TESTING ANTENNAS K-5 TABLE K-1.900 MHz Gain Antenna Test Distances Antenna Power Ratio Distance Apart Over ¼ Wave Appendix L. RF400/RF410 Average Current Drain Calculations L-2 EXAMPLE #1 It ≈ 6.1 mA L-3 EXAMPLE #2 It ≈ 6.9 mA L-4 EXAMPLE #3 It ≈ 12.4 mA L-5 EXAMPLE #4 It ≈ 2.4 mA L-6 EXAMPLE #5 It ≈ 4.1 mA L-7 EXAMPLE #6 It ≈ 0.6 mA L-8 EXAMPLE #7 It ≈ 0.43 mA L-9 L-10 Page Campbell Scientific Companies Campbell Scientific, Inc. (CSI) Campbell Scientific Africa Pty. Ltd. (CSAf) Campbell Scientific Australia Pty. Ltd. (CSA) Campbell Scientific do Brazil Ltda. (CSB)