Combiner Tutorial
Contents:
- Look up a frequency combination.
- Check a frequency set.
- Expand a frequency combination.
- Create a frequency combination.
Quick Start:
-> Look up a frequency combination.
- Select 'ALLOCATION'
- Choose the country.
- Select the system [In brackets].
- Select the (for the purpose) smallest possible frequency set and avoid in case of US sets the local TV channel(s).
- Select the test-bench-item to transfer the set into the testbench.
- Hit the startbutton (If not all frequency items turn green contact the AKG project management.)
- and mark/copy/paste the results from the report window into your word processor software.
-> Check a frequency set.
- Down load (with ctrl v) the set from the word processor software into the 'arbitrary frequency' input window.
- Or write it directly into the 'arbitrary frequency' input window.
- press Add.
- Hit the start button.
- If all frequency-items turn green, the set is OK.
-> Expand a frequency combination.
- Select ALLOCATION and down load the combination which should be expanded from the frequency 'allocation' pages by clicking on the test-bench-item,
- or select COMBINATION and down load the sets with the 'combination' chooser.
- or select COMBINATION and down load the sets by means of the 'arbitrary frequency' input window. If the frequency set, does not belong to an AKG device, choose the system: 'COMPETITION'.
- Add standard sets which lie inside the legal frequency range to the test bench.
- Caution! More than three sets with unfavourable combination sizes may slow down the computation.
- Adjust the combination size of each set by clicking on the system-item.
- Hit the start button.
- If all frequency items turn green, the set is OK.
- If all frequency-items turn red, repeat the previous steps and change or swap the combination sizes of the added sets while keeping the over all size of the combination constant.
-> Create a frequency combination.
- Select COMBINATION and down load the sets which should be combined by means of one of the three testbench choosers.
- Adjust the combination size of each set by clicking on the system-item, so that the over all size equals the size of the wanted combination.
- Hit the start button.
- If all frequency-items turn red, repeat the previous steps with changed and/or swapped combination sizes.
- ATTENTION! Computations with Java take their time.
- If you try to combine more than two sets it is recommendable to run the program in the back ground.
The Online Database
-> Frequency ALLOCATION.
The frequency ALLOCATION pages list the compatible frequency combinations in order of country and system.
To retrieve a combination:
- Select the country and the system.
- Select the (for the purpose) smallest possible frequency combination.
- Hit the start button.
- Select the REPORT window to mark and copy/paste the lists of compatible frequencies into your word processor soft ware.
- If all frequency items turn red choose another combination and/or contact the AKG project management.
- ATTENTION: THE FOLLOWING FEATURE HAS NOT BEEN IMPLEMENTED YET!!!!!!!!!!!!!!!!!!!!!!!!!!!!! If some of the frequencies listed in the REPORT window are marked with four symbol words, they may be disturbed by the picture or sound carrier of a local TV station. (EU stands for European TV channels; US stands for the North and South American TV channels. The 2 digits stand for the channel number of the European or American TV channel. (E.g. 175.000 EU05 US06 indicates that the frequency 175 MHz is very close to the carrier of the European TV channel 5 and the American TV channel 6
- Delete the marked frequencies if their marking corresponds with a local TV channel and contact The AKG Product Management, if the report window is not available (E.g.due to a faulty set all frequencies turn red)
-> Hardware-Versions.
The hardware-versions, which are the raw material of the combiner,
are found in the combiner's hardware version set chooser or on the desk top under 'Sets'.
The hardware-version-sets of the WMS61 and WMS81 series are defined by the following symbols:
- The initial number (E.g. '81' ) identifies the system (E.g. WS81).
- The letters following the system identifier are the initials of the country (E.g. 81'EU'-> Europe) where the harware-version set has been introduced.
- In some cases the country initials have an attachment defining the occupied TV channel. (E.g. 81EU'58'-> TV Channel 58)
- The number or alpha numeric symbol following the back slash (E.g. 81EU58'/03') is the switch position assigned to a particular frequency.
- The size of the harware-version set is either limited by the switching range of the system, the bandedges of the licensed frequency range or the front end bandwidth of the receiver. It happens quite frequently that the hardware frequencies of different countries are identical or the frequency ranges overlap.
- The initial number (E.g. 300 ) identifies the system.
- The following number (E.g. WMS300'#02') is the number of the frequency set.
- The letters following the set number are the initials of the country where the set has been introduced (E.g. WMS300'AT'-> Austria)
- If a country has more than one harware-version set, the set number is attached to the country initials (E.g. 300#02AT'1').
- Select SETS
- Select the hardware-version set, which you want to assign to a different system.
- Mark/copy all frequencies of this set.
- Call up Excel and select Edit/'Insert Content'.
- Repeat the last two steps until all hardware-version sets which you want to convert are written in to the Excel page.
- Delete the numbers from the Excel page.
- Mark/Copy the frequencies .
- Adjust the 'arbitrary frequency' chooser to the wanted system.
- Transfer the frequencies of the hardware-version frequency set with ctrl v into the the 'arbitrary frequency' input window
- Press ADD to down load the frequency set with its newly assigned system into the test bench
- Repeat the last 4 steps until all frequencies are down loaded in to the testbench
The Combiner Applet
-> Frequency COMBINATION.
The combiner extracts from a frequency set or a group of frequency sets a combination of frequencies with
low mutual side band noise and low intermodulation distortion of the respective carriers.
To find such a combination:
- Down load only as many hardware-version sets or frequency combinations as absolutely necessary. Unnecessary sets may slow down the computation.
- For the input of non hardware-version-sets or combinations choose the system with the 'arbitrary frequency' chooser and write or down load the new frequencies into the 'arbitrary frequency' input window.
- Make sure that all frequencies lie within the nationally licensed frequency bands or coincide with the nationally prescribed spotfrequencies.
- Adjust the size of the combinations in the testbench.
- Hit the start button.
- If the calculation takes more time than you expect, swap the combination sizes of the hardware-version-sets.
- If this does not help either reduce the over all combination size by one and repeat the procedure.
- (E.g. We needed altogether 16 frequencies from the hardware-version-sets 300#16US3 and 300#14US. With a combination size of 7 frequencies for the 300#16US3 set and 9 frequencies the 300#14US set, there was no result even after 30 minutes of computation. Although the computation could have gone on in the worst case for another 3 hours it was stopped by clicking on one of the system-items. Then the size of the 300#16US3 hardware-version-set was changed to 9 frequencies and the size of the 300#14US hardware-version-set was changed to 7 frequencies. With this rearrangement (swapping) we had the wanted result within 4 minutes.)
- Stop the time interval between two percentage read offs
- The total time [hours] = (time between read offs[seconds])/(change[%]x36)
- E.g. If a change of .02% takes 2 seconds, the worst case time is 2/(0.02x36) = 2.8 hours
- Split the complete frequency set in a row of aproximately 3 MHz wide subsets.
- Copy/Paste the subsets by means of the 'arbitrary frequency' input window one after the other into the testbench.
- Click on the system-item and adjust the combination size to 2.
- Repeat the last 3 steps until all subsets are on the testbench.
- Hit the start button.
- If there are no results reduce and/or swap the combination sizes between the sets, while keeping the over all combination size constant
- Down load one of the group of hardware-version-sets which you want to combine.
- Click on the systems item and adjust the combination size.
- Hit the start button.
- If all frequencies turn red repeat the three previous steps with a smaller combination size.
- If you were successful delete all red frequencies so that the remaining set comprises only the green frequencies.
- Add the next set and repeat the previous steps until all sets are combined.
-> How to copy/print results.
To copy results (for instance to your email-system) click the cursor into
the result-window, and press ctrl-a and then ctrl-c. the results are placed
in the systems clip-board.
Printing is not yet possible directly from the applet. Use the same procedure as above to copy the results, and paste them into your word processor software.
General Information/Problems
-> Browser problems.
The check-applet requires a java (>1.1) enabled browser.
It has been successfully testet with:
- netscape navigator 4.0-4.7
- netscape 6
- opera 5.01 (java-version)
- microsoft ie 5.0
-> How to down load the program.
If you want to use the applet offline, you have to down load it via the
down load section. You need a unzip-utility to unpack the zip-archive, like winzip.
Once down loaded, you extract the file into an empty directory. To start, look for
the index.html file, and double click on it.