Actual measured values may vary from the calculated values based on manufacturing tolerances cable assembly length connector performance actual operating frequency and measurement accuracy. NO guarantee as to the accuracy of these values is given.

Antenna Duplexer Physics Forums

### The calculator will only return data for Frequencies below the Cutoff Frequency or fco of the cable.

**Duplexer Cable Length Calculator**. Cable length in any transmission line between two point will always be larger than the original length between the two points as there will be certain sag involved. Due to the series resonance circuit of C1 and L1 only a small bandwidth can pass to the next stage eg. D525-54 66 minus amount of hi-lift DNS 61 minus amount of hi-lift.

Eland Cables Cable Calculator can help you determine the most appropriate cable size for your installation against British and IEC standards. Easy calculator to size DC cables based on their length current and citcuit voltage. Applications 3dB coupler.

Enter Manufacturers Duplexer Loss in db. Cable Size Calculator Find the size of your WireCable. The cable sizing calculator supports the following conductors.

For example if the measured length at a certain frequency is 75 inches and the free space wavelength is 100 inches the velocity factor will be 075. Cable Length m Calculate Min. The cable lengths from the repeater transmitter and receiver to the duplexer are usually not critical but making them a half wavelength or multiples of a half wavelength in coax with velocity factor is not a bad idea.

So the length tip-to-tip of RG-142 or RG-400 between the cavities based on 14500 MHz is 308 cm or 1213 inches. CABLE LENGTH FORMULA Floor to Shaft Center 180. This calculator helps you to find cable or conductor length based on the cable span and cable sag.

Need to know how thick a cable needs to be for a solar panel fridge battery or motor. Diplexer Calculator Bridged Tee A diplexer presents a broadband termination to eg. Z_c sqrtR_c2 X_c2.

Also included is a length of the cable from the receiver port of the duplexer to the input of the LNAFilter panel. There is no electrical reason but there is an excellent practical reason with feedlines such that if you need a 49 foot cable and a 50 foot cable murphys law is youll inevitably find a way to install the 50 foot cable in place of the 49 foot cable leaving a surprising amount of slack and then try to install the 49 foot cable in place of the 50 footer and end up 12 inches short. The if – amplifier which needs only to present a good match for this frequency range.

And they should be checked with an electrician. Cable current derating calculation The current dearing for the cables has been implemented according to ASNZS 30082017. D400-144 8 183.

The length of coupler line quarter wavelength LVelocity factor V0. How to calculate the length needed. D400-54 63 subtract amount of Hi-Lift.

Then add the jumper cable to the duplexer and the pretuned-to-50-ohms duplexer. The lengths are measured from the ends of the connectors. A variable-length phasing cable for use in determing duplexer cable lengths has been described as an cheaper alternative to a set of phasing cables with a 10mm length increment.

And the length tip-to-tip of RG-142 or RG-400 to the T provided its a real UG-28AU based on 145 MHz is 686 cm or 27 inches. Ive made dozens and dozens of cables to duplexers only making them a short but comfortable length and have never had a problem. You can then calculate the ratio between what the wavelength is in free space and what you read.

Enter Length of Feedline in. This will be the length of 12 wave. Now remove the jumper cable.

A mixer which is connected on the left side. Propagation velocity at vacuum F0. For example lets calculate the length of a radio wave at 285 MHz.

Put the thruline wattmeter AFTER the duplexer and before the dummy load. The impedance is calculated as. Celwave Duplexer Cable Lengths by Product All cables are made from MIL-Spec RG-214 double-shi elded silver-tinned coax unless noted.

Enter Manufacturers cable loss in db per 100 feet. D525-216 10 185186. Enter 0 if you dont have a duplexer.

Ideal for 12V and 24V systems such as campers van conversions and solar projects. Usually you measure tip to tip. This Cable size calculator helps you find the exact size of your cableWire needed along with voltage drop and much more.

The cable uses MF SMA connectors to vary the length. If everything is 50 ohms it should not need ANY tweaking. This is different than what TXRX recommends.

Complete the sections below to calculate your results. All other frequencies. Assembly length shown is in inches measured from ti p-to-tip of male N connector.

Cable Calculator – Cable Sizing. Calculated Duplexer Power Loss in Watts. Use this calculator to find out.

Solid or stranded copper. Caution – for Guidance ONLY. The next post will cover the use of the variable length cables and include screen shots from instruments and photos.

Enter Transmitter Watts Output Power to the Duplexer. D800-384 14 190. Flexible cables are not supported yet.

As cable are not stiff object its natural they have a parabolic shape. A typical crimp-on male N connector adds exa ctly 05 inches to the assembly length. Center frequency Hz Example Velocity factor 63 063 center frequency f01GHz L 4725 mm Required length becomes 4725mm plus lead length.

Required Cable Size mm 2 Voltage Drop volts Percentage Drop Load Amps Reset. This length is a multiple of a half wavelength at 902 MHz and was selected to optimize out-of-band rejection characteristics of the entire receive filtering system. The formula is 300000000 28500000 10526316 meters or directly in MHz it would be 300 285In order to calculate the answer in feet you could use either 984 Frequency in MHz or a more accurate formula the one I use is 9836 Frequency in MHz.

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