RigExpert AA-1500 ZOOM Скачать руководство пользователя страница 38

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User’s manual

Amphenol
202109-10
1 Watt
terminator plug

Low SWR

Bird 8201
500 Watt oil-cooled termination

High SWR

50 Ohm dummy loads are not all equal.

For

calibration (see page 32), please use

low-power RF terminators which provide
low SWR over the wide frequency range.

High-power  terminators,  especially
connected  via  long  cables,  are  suitable
neither  for

calibration purposes (page

32), nor for analyzer

self-tests (page 30).

Annex 7

Dummy loads

Содержание AA-1500 ZOOM

Страница 1: ...AA 1500 ZOOM RigExpert User s manual Antenna and cable analyzers...

Страница 2: ...For latest manuals and software updates please visit http rigexpert com...

Страница 3: ...R chart Chart ZOOM Data screen Frequency and range entry Return loss chart R X chart Smith chart Memory operation SWR mode Display all parameters MultiSWR mode Applications Antennas Coaxial lines Meas...

Страница 4: ...locate a fault within the feedline system The analyzer is equipped with a Bluetooth Low Energy module for a wireless connection with your laptop tablet or smartphone The following tasks are easily ac...

Страница 5: ...too long First time use Please insert three AA batteries either alkaline or Ni MH ones into the battery compartment of the analyzer watching the polarity Instead you may power it from a spare USB por...

Страница 6: ...nctional key For the convenience alternative functions are marked with yellow You may press the Help key to open a help screen listing all active hot keys Connecting to your antenna Plug the cable to...

Страница 7: ...nected to the analyzer it is time to measure its characteristics Press the SWR chart key to open the SWR chart screen then press OK to start a new measurement A few moments later the result will be di...

Страница 8: ...range press the Frequency Range key Use cursor keys to navigate or the to keys to enter values Do not forget to press the OK key to apply Press Up or Down cursor keys while holding the Functional key...

Страница 9: ...display R and X for series or parallel models of a load Press Functional key and to switch between these models Smith chart The Smith chart key opens a screen where the reflection coefficient is plott...

Страница 10: ...ss OK SWR mode To watch the SWR at a single frequency press the SWR key Do not forget to press the OK key to start or stop the measurement Change the frequency with Left or Right cursor keys or press...

Страница 11: ...lues of L or C This can be useful for experienced users This screen displays values for series as well as parallel models of impedance of a load 11 In the series model impedance is expressed as resist...

Страница 12: ...e the SWR at up to five different frequencies This mode may be useful for tuning multi band antennas Use Up and Down cursor keys to select a frequency to be set or changed then press the Frequency key...

Страница 13: ...ose The picture on the left shows the SWR chart of a car VHF antenna The operating frequency is 145 5 MHz The SWR at this frequency is about 1 25 which is acceptable The next screen shot shows SWR cha...

Страница 14: ...he results while adjusting various parameters of the antenna For multi band antennas use the MultiSWR mode You can easily see how changing one of the adjustment elements trimming capacitor coil or phy...

Страница 15: ...has different velocity factor for instance for RG 58 it is 0 66 Notice that this parameter may vary depending on the manufacturing process and materials the cable is made of To measure the physical le...

Страница 16: ...49 156 897 4 100 000 1 4 39 58 feet 3 Finally find the velocity factor Just divide the above speed by the electromagnetic constant Example 5 meters 16 4 feet of open circuited cable Resonant frequency...

Страница 17: ...e fault in a cable just use the same method as when measuring its length Watch the behavior of the reactive component X near the zero frequency If the value of X is moving from to 0 the cable is open...

Страница 18: ...m the far end of the cable until the X value falls to zero or changes its sign Do not forget to restore the open circuit if needed 11 cm 0 36 ft were cut off 1 Calculate the physical length Divide the...

Страница 19: ...n To measure the characteristic impedance of a cable 1 Connect a non inductive resistor to the far end of the cable The exact value of this resistor is not important However it is recommended to use 5...

Страница 20: ...e 2 41 00 MHz max 88 40 MHz min 4 Switch to the Data at cursor screen by pressing the Data key and find values of R at previously found frequencies Example 1 33 0 Ohm min 78 5 Ohm max Example 2 99 2 O...

Страница 21: ...m a few pF to about 0 1 F as well as inductance from a few nH to about 100 H Since measuring of capacitance and inductance is not a main purpose of RigExpert analyzers the user will have to gain some...

Страница 22: ...X is 25 100 Ohm for capacitors or 25 100 Ohm for inductors Change the scanning range and perform additional scans if needed Transformers RigExpert analyzers can also be used for checking RF transforme...

Страница 23: ...ency of a trap may be measured Example A coaxial trap constructed of 5 turns of TV cable coil diameter is 6 cm was measured A one turn coil about 10 cm in diameter connected to the analyzer was placed...

Страница 24: ...r length velocity factor cable loss and characteristic impedance measurement Optional open short load calibration RF output Connector type N Output signal shape square Output power 10 dBm at 50 Ohm lo...

Страница 25: ...ector of the analyzer Do not connect it to your antenna if you have active transmitters nearby Avoid static discharge while connecting a cable to the analyzer It is recommended to ground the cable bef...

Страница 26: ...de is designed to help making or checking 1 4 or 1 2 coaxial stubs Connect either open or short circuited cable to the analyzer and press OK to start The analyzer will immediately show resonant freque...

Страница 27: ...button and edit the value of the velocity factor then press OK to start measurement To find the velocity factor of an unknown cable press the Down key and enter the physical length then press OK The...

Страница 28: ...circuited Press OK to start Next short circuit the far end of the cable and press OK to continue Once the analyzer finishes the measurement you will see the Loss versus frequency chart Use Left and Ri...

Страница 29: ...to start Next the far end of the cable should be short circuited Press OK to continue There are several reasons why the resulting chart does not look smooth so we need to use Left and Right cursor ke...

Страница 30: ...disconnected from the antenna connector of your analyzer then press OK to start the first test Detector test You should see the Passed message in case of success Continue with two more tests the seco...

Страница 31: ...pedance 25 50 75 or 100 Ohm which affects SWR and return loss readings Units select metric meters or imperial feet units Bands select region for highlighting of radio amateur bands Cable vel factor ch...

Страница 32: ...e line and then a reflected pulse is observed By knowing the delay between two pulses the speed of light and the cable velocity factor the DTF distance to fault is calculated The amplitude and the sha...

Страница 33: ...ncy Domain Reflectometry but the TDR term is used in this document since all calculations are made internally and the user can only see the final result The vertical axis of the resulting chart displa...

Страница 34: ...User s manual 34...

Страница 35: ...asurement which will take some time Use the arrow keys to move the cursor or to change the display range Watch the navigation bar at the top right corner of the screen to see the current position of t...

Страница 36: ...y important for high frequencies 100 MHz and upper Three different calibration standards should be used an open a short and a load usually a 50 Ohm resistor A place where these standards are connected...

Страница 37: ...nstructions on the screen connect open short and load calibration standards to the antenna connector of the analyzer You may connect calibration standards to the far end of a cable so the cable will b...

Страница 38: ...Ohm dummy loads are not all equal For calibration see page 32 please use low power RF terminators which provide low SWR over the wide frequency range High power terminators especially connected via l...

Страница 39: ...icable essential requirements of directive 2004 108 EC the EMC Directive Ashot Andrieiev Director Equipment Brand name Model number Antenna and cable analyser RigExpert AA 1500 ZOOM Reference No IEC 6...

Страница 40: ...ent new product Disposing of this product correctly will help save valuable resources and prevent any potential negative effects on human health and the environment which could otherwise arise from in...

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