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Refer to the Hand Held Spectrum Analyzer Users Guide, Field Measurement chapter for a detailed explanation of these Adjacent Channel Power Ratio and Channel Power measurement functions and examples.
ACPR stands for Adjacent Channel Power Ratio. This is a Spectrum Analyzer measurement. It is a measure of the amount of adjacent channel power that leaks to within the channel of interest. The Users Guide provides extended information on these functions.
Attenuation, RBW and VBW can all be automatically coupled or manually coupled. When automatically coupled, the attenuation changes as the reference level is changed, the RBW changes as the span is changed and the VBW changes as the RBW is changed. When they are manually coupled they can be changed independently. The "*" after the parameter indicates that it is manually coupled.
More than likely, there is a large signal outside of your measurement span causing the pre-amp to saturate. The pre-amp is a broadband amplifier, with no tuning or filtering before its input. This is why we recommend the pre-filters in the optional accessories.
The connector marked RF Out / Reflection is the only port that requires OSL calibration for Return Loss or / SWR measurements. Some Models like the S251C can make Insertion Gain or Insertion Loss measurements and the second port is included in an OSLIT (Open, Short, Load, Isolation, Through) calibration. Refer to the Users Guide for additional details.
All model "C" units have the external connector for power monitoring, but power monitor is an option (#5) and must be installed at the time of ordering or the unit must be returned for an upgrade. You will also need a power detector, which is an accessory. Check your users guide for a list of Anritsu Power detectors available for your unit.
That depends! How well do you want to know the distance and loss of your system elements? The propagation velocity affects the distance that reflections are reported on the Site Master. Cable manufacturers often spec their prop v +/- 10%. So, the antenna at the end of your cable will have a +/- 10% error in distance. You can minimize this problem by sweeping known lengths of cable in DTF mode. You can 'dial in' the propagation velocity until the reflection at the end reads properly on the Site Master. The cable loss given by the manufacturers, however, is usually quite accurate. Using their published specification is sufficient. The Site Master cable tables offer both propagation velocity and loss values for many standard cables used in cell installations today.
Download your free update via the Internet. The software tools help menu has a direct link to the Anritsu Download site where this can be found. Or go directly to "http://www.us.anritsu.com/sitemastersoftware" Handheld Software Tools. Or call 1-800 ANRITSU and ask for Site Master Support.
There is not a a DX symbol, what you may bear seeing is the error message for Integrator Failure. It kind of looks like a "DX". If this is really what is happening then your Site Master may have been damaged by excessive RF or ESD being applied to the test port (most common cause). There could be other causes for this type of failure too. You should contact our Customer Service Department for more help.
If a battery is allowed to totally discharge, the smart-memory capability of the battery may be lost, resulting in incorrect battery capacity readings or loss of communication with the battery.
The NiMH battery will last longer and perform better if allowed to completely discharge before recharging. For maximum battery life, it is recommended that the NiMH battery be completely discharged and recharged once every three months.
If a flashing LOW BATT indicator is accompanied by an audio beep at the end of each trace, the battery has approximately one minute of useable time remaining.
Yes. If you are testing the line with the antenna attached, there is a good chance that the Site Master could be damaged by ESD. This happens because ESD gets onto the center conductor through the antenna's elements. It is safe to test with a load or short because there is no path for the ESD to get onto the center conductor.
An integrator failure is typically caused by excessive RF power to the input of the Sitemaster. Different Sitemaster models have different damage levels that they can tolerate and newer models have improved immunity to overpower conditions. See the appropriate user manual for the damage level for your particular unit. One common way this overpower condition can be caused is by a high powered interfering carrier when testing with the antenna attached at a co-locate site. If the power level of the interference is too high it could cause damage to the Site Master. To find out if damage has occurred, disconnect the Site Master from the coax under test and if the integrator failure still occurs then there may be damage to the unit. To prevent this type of situation, check the power level on the antenna first using a power meter or power monitor (Options 29 or 5) to see if any power is present on the antenna before sweeping it.
Basically, the maximum distance that can be measured in the DTF mode is controlled by 3 factors, 1) the data point resolution, 2) the frequency span or F2 minus F1 and 3) the propagation velocity entered for the coax under test. Since the propagation velocity cannot be changed, you must change either the frequency span or the data point resolution in order to go further. If using a 'B' or 'C' model, raising the data point resolution will almost double the distance. If you are using an 'A' or earlier model or cannot change the data point resolution then the frequency span will need to be smaller. Be sure to re-calibrate if the frequency span has to be changed.
This is a problem with the database operations. It is caused when more than 2 lines of information have been added into the Plot Description field even if the extra lines are blank. To fix this, select the Record then select Edit. Place the cursor at the end of the 2nd line of the Plot Description field. Left-click and hold down the mouse button and scroll down. The cursor will now be below the 2nd line. Press the Delete key on the keyboard to remove the extra lines. The cursor should now be at the end of the 2nd line. Either select another record or select Done. To prevent this from happening on the initial entry of Plot Descriptions, try to remember not to press the Enter key when done with the 2nd line entry.
The FCC regulates how much output power of any given transmitter. Since this is a fixed quantity, the system designers are forced to squeeze out every bit of performance out of the entire system.
It is normal for the display contrast to change with temperature. Use the contrast adjust to compensate.
Not usually. The cable used is very critical in making accurate, repeatable measurements. The cable must be 'phase stable'. Many are, including all that are sold with the Site Master. This type phase and loss of this type of cable does not change much as it is flexed and therefore produces consistent measurements when used with your Site Master.