Abstract:
A circuit arrangement for automatically indicating the alpha-numeric station designation of a received frequency signal in one of a plurality of frequency ranges in a radio or TV receiver. The circuit includes a counter for determining the frequency of the received signal. The counter addresses a first memory containing address information. A second memory connected to the first memory is addressed by the output of the first memory. The second memory stores information corresponding to the station designations of the received frequency signals. A third memory resets the counter to 0 to the lowest frequency within each range of receiving frequency signals.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The invention relates to a circuit arrangement for indicating the names of broadcasting stations in radio or TV receivers. 
     2. Description of the Prior Art 
     In order to tune the receiving oscillator in a radio device, the capacity of a condenser in the frequence determining oscillation range is changed. The condenser is coupled with a scale on which the frequences and/or the broadcasting stations are listed. However, the names of all receiving broadcasting stations cannot be entered on this scale. If only frequency values are listed on this scale, the name of the respective broadcasting stations must be determined by means of a broadcasting station table. The latter is also the case for digital tuning after frequency synthesis. 
     German Application No. 28 13 727 describes a circuit arrangement with a memory arrangement which contains information corresponding with the names of broadcasting stations with their carrier frequencies. A continuous comparison of all broadcasting frequencies with the currently set receiving frequency takes place. A drawback of this approach is that this comparison requires a certain time, particularly if there is a large number of broadcasting stations in the memory so that the indication cannot take place immediately as the respective frequency on the broadcasting station scale is passed. The described principle is applicable only if the number of broadcasting stations stored of the memory is in an order of magnitude which can be set directly by push buttons. Another drawback is that the complete frequency information for every station name to be stored must be retained in a memory. 
     SUMMARY OF THE INVENTION 
     The purpose of this invention is to provide a circuit arrangement for indicating station names in radio or TV receivers which may contain as many station names as desired without incurring a significant time loss in finding and indicating the set station. In particular, the memory expenditure required for retaining the station names should be kept at a lower level. 
     In accordance with this invention the required expenditure for the automatic station indication is greatly reduced by an addressing system derived from the receiving frequency (and/or the corresponding oscillator frequency) by division and/or addition and/or substraction. By addressing the broadcasting station memory--in the simplest case--directly by the divided set receiving frequency and/or the corresponding oscillator frequency, an automatic indication of the set stations is achieved in the simplest manner. 
     In an advantageous further development of the invention, the required memory for the broadcasting station names, addressed by data derived from the receiving frequency--compared with the current state of the art--is greatly reduced even if an additional memory is planned which correlates the received frequencies with the addresses in the memory containing the names of the stations. 
     Compared with known arrangements, it is not necessary to have a complete frequency value in the memory for every received station, but it is only necessary to have information which is sufficient for addressing the memory location containing the station designation. If multiple station or program designations exist, additional memory space can be saved by multiple addressing of the same designation. 
     Frequency tolerances, for example, can be equalized in an advantageous manner by identical addresses in the memory for the station names being contained in an additional memory for individual adjacent frequencies. 
     The memory for the station names can thus be structured essentially free of redundancy. Memories with storage locations of various sizes are planned in which in each case station names with the same or similar length are retained, and the names for the various programs of the broadcasting companies which are reflected by station chains must only exist once as &#34;station names&#34; and can be addressed by various frequencies implemented by the additional memory. This arrangement has the additional advantage that all radio programs which can be heard in a larger geographical area can be retained in the first memory, whereas the correlation of a station which can be heard in a certain region can be implemented by changing the contents of the additional (second) memory. This renders the memory capacity to be altered very much smaller so that locally different &#34;exchange PROMs&#34; can be produced with lower expenditure. An adjustment to local conditions can be achieved advantageously in such a manner that individual correlation stored in the ROM memories can be replaced by random correlations by additional selectively switchable RAM storage means. 
     In accordance with another additional development, receivers for several frequency ranges are equipped with additional converters which adjust the respective frequency ranges by frequency division and differentiation to the addressing range of the additional memory in such a manner that the resultant range of frequency values is superimposed over the available planned addressing range (beginning at the first memory location). The &#34;resolution&#34; determined by the number of planned memory addresses is adjusted to the frequency grid of the required tuning accuracy based on the respective frequency range. 
     The frequency grid resulting from the existing addresses is adjusted preferably to the density of station distributions determined by international agreements concerning wave schedules in such a manner that in each case another memory location for station names is addressed at the border line of a &#34;receiving channel&#34;. This &#34;synchronization&#34; is achieved by the fact that the receiving frequency is divided in a ratio corresponding with the frequency grid of the wave schedule. 
     In order to also guarantee adjustment to local receiving conditions, the memories optionally containing the station names preferably together with the memories effecting the addressing can be produced in a plug-in form (i.e. a PROM memory) so that it is possible to facilitate equipment according to the requirements in the country of delivery and which furthermore enables the user to implement a corresponding change during trips upon moving and similar applications without particular difficulties. In order to facilitate changes by the user, it is advantageous to design the memories in the form of plug-in modules which can be handled without additional tools. 
     In another version of this invention an adjustment to local receiving conditions is achieved in particular by the fact that parallel to the programmed station names additional station names can be programmed in parallel RAM memories by external inputting means a (connectable key pad or similar means) which appear instead of the pre-programmed names if the corresponding frequency is set. In this manner differences can be established concerning the received stations at the receiving locations relative to the larger local area for which the receiver is intended. Instead of individual country names the address in the second memory which facilitates the correlation of receiving frequency and memory location for the broadcasting station name can be designed in a &#34;superscrible&#34; manner by a parallel RAM memory so that--particularly with station chains which broadcast a single program--the correlation of receiving frequency and program designation can be altered with little memory expenditure. The memory content to be altered per receiving program in this version of the invention corresponds with such information which is required in order to definitely identify a program designation within an existing &#34;program table&#34;. This arrangement is helpful also in those cases where regional filler stations exist in addition to high-powered primary stations. 
     As indicated by the above, the invention can be used to advantage even in those cases where a station can be heard in nearly every receiving channel of the frequency grid determined by the wave schedule--preferably in the long, medium and short wave range so that addressing is free of redundancies caused by the additional second memory. The above described situation exists particularly with a dense frequency network as is increasingly the case particularly in densely populated regions. Due to the different expanding conditions, fewer stations can be heard in FM broadcasting networks as far as the respective receiving location is concerned, but this is offset by the number of channels per receiving area due to the broader band transmission so that the additional memory expenditure is low even if there is a possible address for all existing receiving frequencies. The latter problem can be reduced if specific memories are produced for certain receiving areas where frequency areas which are not covered do not require to be taken into consideration in the first as well as in the second memory. Since the coordinations on a preferred basis may be made differently for different frequency ranges combined in individual memory blocks, an optimum adjustment to all conditions is possible. The invention can be advantageously used for combined radio and TV receivers as well as for receivers prepared for the so-called &#34;satellite TV&#34;. 
    
    
     BRIEF DESCRIPTION OF THE DRAWING 
     Below, the invention is explained by way of a version shown in the drawings. The drawings are identified as follows: 
     FIGS. 1a and 1b show a block circuit diagram of one version of the present invention; and 
     FIG. 2 shows an additional circuit for the version shown in FIG. 1. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The version shown in FIGS. 1a and 1b comprises the following construction elements: 
     1. IS 1: SN7400 (4 NAND gates with 2 inputs) 
     2. IS 2: SN7490 (decimal counter) 
     3. IS 3: SN7490 (decimal counter) 
     4. IS 4: SN7490 (decimal counter) 
     5. IS 5: SN7474 (D-Flip-Flop) 
     6. IS 6: SN7410 (3 NAND gates with 3 inputs) 
     7. IS 7: SN7404 (six-fold inverter) 
     8. IS 8: SN74161 (synchronous 4-bit binary counter) 
     9. IS 9: SN74161 (synchronous 4-bit binary counter) 
     10. IS 10: SN74161 (synchronous 4-bit binary counter) 
     11. IS 11: SN7475 (D-Flip-Flop) 
     12. IS 12: SN7475 (D-Flip-Flop) 
     13. IS 13: SN7475 (D-Flip-Flop) 
     14. IS 14: SN74161 (synchronous 4-bit binary counter) 
     15. IS 15: HN462716 (2K-byte EPROM memory) 
     16. IS 16: SN74155 (2-bit demultiplexer) 
     17. IS 17: TMS2532 (4K-byte EPROM memory) 
     18. IS 18: DL1414 (4-digit 16-segment LED indicator with decoder) 
     19. IS 19: DL1414 (4-digit 16-segment LED indicator with decoder) 
     20. IS 20: DL1414 (4-digit 16-segment LED indicator with decoder) 
     21. IS 21: DL1414 (4-digit 16-segment LED indicator with decoder) 
     22. G: Oscillator, 1 MHz 
     Oscillator G generates a frequency of 1 MHz, which is directed to the input of counter IS 2 (pin 1) via NAND gates IS 1. The counter divides the frequency in a ratio of 10:1. From the outlet of counter IS 2 (pin 12) the frequency continues to the input of counter IS 3 (pin 1) which also divides the frequency in a ratio of 10:1. From the output of IS 3 (pin 12) the frequency continues to the input of counter IS 4 (pin 1) which also reduces the frequency by 10:1. The entire dividing ratio thus is 1000:1. From the outlet of counter IS 4 (pin 12) the frequency advances to the input of the D-Flip-Flop IS 5 (pin 3). At the outputs of the D-Flip-Flop (pin 6, 2 and 5) pulses are created which have a pulse length of 1 ms. This pulse length is favorable since it enables the binary counters IS 8, 9, 10 to count the oscillator frequency of the receiver in Kilohertz. (By varying the counting time and/or the dividing ratio, an adjustment can be made to the frequency grid provided by the wave schedule.) 
     From the output of the integrated circuit IS 5 (pin 5) the pulses continue to the input of the binary counter IS 10 (pin 10). The counting time is determined by these pulses. The pulses also reach the input of counter IS 14 (pin 2). 
     From the output of the counter IS 4 (pin 11 with a frequency of 2 kHz and pin 12 with a frequency of 1 kHz) as well as from integrated circuit IS 5 (pin 6) the impulses are transported to the inputs of NAND gates IS 6 (pins 1, 4 and 5). At the outputs of integrated circuit IS 6, T-(Takt-) pulses are at pin 6 and S-(Stell-) pulses are produced at pin 8. 
     The T pulse at the output of integrated circuit IS 6 (pin 6) is conveyed to the inputs of flip-flops IS 11, 12, 13 (pin 4, 13) via an inverter IS 7 (pin 10). With this pulse the data from the binary counters IS 8, 9, 10 is transferred to the flip-flops IS 11, 12, 13. 
     The S pulse at the outlet of the NAND gate IS 6 (pin 8) is conveyed to the inlet of binary counters IS 8, 9, 10 (pin 9). With this impulse the data from a matrix M with which the presetting of counters IS 8, 9, 10 is determined is transferred to the binary counters IS 8, 9, 10 (pins 3, 4, 5, 6). 
     The oscillator frequency of the receiver is conveyed to terminals a, b and is conveyed to the Takt [pulse] inputs of binary counters IS 8, 9, 10 (pin 2) via a transistor T1 and an inverter IS 7 (pin 6). 
     The outputs of counters IS 8, 9, 10 (pin 11, 12, 13, 14) are connected with the inputs for flip-flops IS 11, 12, 13 (pins 2, 3, 6, 7) whereas the outputs of the flip-flops IS 11, 12, 13 (pins 9, 10, 15, 16) are connected to the addressing inputs of the 2K-byte ROM memory IS 15 (pins 1, 2, 3, 4, 5, 6, 7, 8, 19, 22, 23). 
     The outputs of memory IS 15 (pins 9, 10, 11, 13, 14, 15, 16, 17) lead to the addressing inputs of the 4K-byte ROM memory IS 17 (pins 4, 3, 2, 1, 23, 22, 19). The first four address inputs of memory IS 17 (pins 5, 6, 7, 8) are connected with the outputs of the binary counter IS 14 (pins 11, 12, 13, 14). 
     Connected to the outputs of memory IS 17 (pins 9, 10, 11, 13, 14, 15, 16) are the address inputs of indicators IS 18, 19, 20, 21 (pins 1, 2, 8, 9, 10, 11, 12). 
     The output pin 11 of the counter IS 14 leads to the input pin 3 of a demultiplexer IS 16, and correspondingly the output of pin 12 leads to the input of pin 13. The outputs of the demultiplexer IS 16 (pins 9, 10, 11, 12) are each connected with pin 3 of the indicators IS 18, 19, 20, 21. The outputs pins 13 and 14 of the counter IS 14 also lead to the inputs pins 4, 5 of the indicators IS 18, 19, 20, 21. 
     The mode of operation of this circuit arrangement is as follows: 
     Via terminals a and b, transistor T1 and the inverter IS 7 (pin 6), the oscillator frequency is led to the binary counters IS 8, 9, 10 which counts the frequency in Kilohertz. 
     For the FM range it is necessary to insert an attenuator of 20:1 between T1 and the inverter IS 7 in order to get a frequency step of 5 kHz between the stations. For television an attenuator of 1000:1 must be used between T1 and the integrated circuit IS 7 in order to obtain a frequency response of 7 and/or 8 kHz. These attenuators are not shown in the drawing. 
     When the output of the inverter IS 7 (pin 2, 6) supplies a high level pulse (a low level pulse is then at pin 5), control pulses T and S will then be generated at the outputs of the NAND gates IS 6 (pins 6 and 8). 
     Pulse T is generated only during the first half of the pulse at the input of the NAND gates IS 6 (pins 5, 9). This timing is determined via the pulses at the inputs of the NAND gates IS 6 (pin 1 and pin 4). 
     During the second half of the pulse at the input of the NAND gates IS 6 (pins 5, 9), an S-pulse is generated at the NAND gates IS 6 (pin 8). 
     By means of the sequence of T- and S-pulses, it is determined that the data will initially be taken from the binary counters IS 8, 9, 10 into the flip-flop IS 11, 12, 13 and subsequently the data will be taken over from the matrix M into the counters IS 8, 9, 10. 
     As long as pulses T and S are effective, counters IS 8, 9, 10 do not count since the counter IS 10 (pin 10) carries an low level pulse. 
     If a pulse with a high level is received at the flip-flop IS 5 (pin 5)--a pulse with a low level is incurred at pin 2, 6--each counter IS 8, 9, 10 counts the frequency which is incurred at its input point pin 2. 
     The binary number of the oscillator frequency of the receiver which is received at outlet pin 9, 10, 15, 16 of flip-flops IS 11, 12, 13 must be equal to zero for the lowest frequency in the wave range. By presetting counters IS 8, 9, 10, this condition is achieved through matrix M. The presetting which is implemented for every wave range is implemented in the following manner: 
     The frequency band in the long-wave, medium-wave and short-wave range runs from 150 kHz to 26 MHz. It was noted above that an attenuator 20:1 must be inserted between T1 and inverter IS 7 in the FM range. This means that a frequency band of 4.375 to 5.4 MHz appears at the outlet of the attenuator. This also means that the upper working frequency is 26 MHz. 
     In order to be able to count the frequency of 26 MHz, four binary 4-bit counters are required. The last output of the counter (32,768 kHz) is not needed since the upper working frequency is lower. Thus, the upper limit frequency of the counter is 32,767 kHz. 
     In order to guarantee that counters IS 8, 9, 10 output generate a binary zero at their outputs, the next condition must be met for the lowest frequency in the wave range: 
     
         f.sub.v =f.sub.gz -f.sub.uo, 
    
     wherein: 
     f v  --is the number of the frequency to which the counter must be preset. 
     f gz  --is the number of the upper limit frequency of the counter (32,767 kHz). 
     f uo  --is the number of the lowest oscillator frequency of the receiver in the wave range. 
     Under the assumption that the ZF (zero frequency) of the receiver is 455 kHz, the following is derived: 
     For the long-wave band f v  =32,767-(150+455)=32,162 kHz. 
     The binary number 32,162 is formed by the outputs of the counter: 
     16,384; 8,192; 4,096; 2,048; 1,024; 256; 32; 2 (with a high level). 
     The following is valid for the AM range: 
     Memory IS 15 is also used for the AM band. For the first address in the AM range address 140 is available. 
     
         f.sub.v =32,767+140-(520+455)kHz=31,932 kHz. 
    
     The binary number 31,932 forms the outputs of the counters: 16,384; 8,192; 4,096; 2,048; 1,024; 128; 32; 16; 8; 4. 
     The following holds true for the FM band: 
     Memory IS 15 is also scheduled for use for the FM band. The first address in the FM range is address 1,229. 
     
         f.sub.v =32,767+1,229-(5,950+455)kHz=27,591 kHZ. 
    
     For memory IS 15 a 2K-byte ROM memory was selected (2,048×8 bit) which has 11 address inputs (A0 through A10). Memory IS 15 can be controlled with three binary 4-bit counters, although the calculation for presetting must be carried out with four binary 4-bit counters. 
     The outputs of the binary counters IS 8, 9, 10 (pins 11, 12, 13, 14) are connected with the address inputs of the 2K-byte ROM memory IS 15 (pins 1, 2, 3, 4, 5, 6, 7, 8, 19, 22, 23) via flip-flops IS 11, 12, 13 (pins 9, 10, 15, 16). The flip-flops IS 11, 12, 13 eliminate flickering of the letters at the indicators IS 18, 19, 20, 21. 
     Memory IS 15 has two purposes: it determines the address of memory IS 17 and eliminates the influence of the frequency variations of the receiver oscillator upon the accurate readouts of the indicator which is due to temperature changes or an inaccurate tuning of a station. The program of memory IS 15 is listed in the following table: 
     Addresses of memory IS 15 (at the output of IS 15): 
     
         ______________________________________LONG-WAVE RANGE______________________________________0    1      2      3    4    5    6    7    8    9   010   11     12     13   14   15   16   17   18       119   20     21     22   23   24   25   26   27       228   29     30     31   32   33   34   35   36       337   38     39     40   41   42   43   44   45       446   47     48     49   50   51   52   53   54       555   56     57     58   59   60   61   62   63       664   65     66     67   68   69   70   71   72       773   74     75     76   77   78   79   80   81       882   83     84     85   86   87   88   89   90       991   92     93     94   95   96   97   98   99       10100  101    102    103  104  105  106  107  108      11109  110    111    112  113  114  115  116  117      12118  119    120    121  122  123  124  125  126      13127  128    129    130  131  132  133  134  135      14______________________________________ 
    
     
         ______________________________________AM RANGE______________________________________136137 138139   140    141  142  143  144  145  15146147 148149   150    151  152  153  154  155  16156157 158159   160    161  162  163  164       17165166 167168   169    170  171  172  173       18174175 176177   178    179  180  181  182       19183184 185186   187    188  189  190  191       20192193 194195   196    197  198  199  200       21201202 203204   205    206  207  208  209       22210211 212213   214    215  216  217  218       23219220 221222   223    224  225  226  227       24228229 230231   232    233  234  235  236       25237238 239240   241    242  243  244  245       26246247 248249   250    251  252  253  254       27255256 257258   259    260  261  262  263       28264265 266267   268    269  270  271  272       29273274 275276   277    278  279  280  281       30282283 284285   286    287  288  289  290       31291292 293294   295    296  297  298  299       32300301 302303   304    305  306  307  308       33309310 311312   313    314  315  316  317       34318319 320321   322    323  324  325  326       35327328 329330   331    332  333  334  335       36336337 338339   340    341  342  343  344       37345346 347348   349    350  351  352  353       38354355 356357   358    359  360  361  362       39363364 365366   367    368  369  370  371       40372373 374375   376    377  378  379  380       41381382 383384   385    386  387  388  389       42390391 392393   394    395  396  397  398       43399400 401402   403    404  405  406  407       44408409 410411   412    413  414  415  416       45417418 419420   421    422  423  424  425       46426427 428429   430    431  432  433  434       47435436 437438   439    440  441  442  443       48444445 446447   448    449  450  451  452       49453454 455456   457    458  459  460  461       50462463 464465   466    467  468  469  470       51471472 473474   475    476  477  478  479       52480481 482483   484    485  486  487  488       53489490 491492   493    494  495  496  497       54498499 500501   502    503  504  505  506       55507508 509510   511    512  513  514  515       56516517 518519   520    521  522  523  524       57525526 527528   529    530  531  532  533       58534535 536537   538    539  540  541  542       59543544 545546   547    548  549  550  551       60552553 554555   556    557  558  559  560       61561562 563564   565    566  567  568  569       62570571 572573   574    575  576  577  578       63579580 581582   583    584  585  586  587       64588589 590591   592    593  594  595  596       65597598 599600   601    602  603  604  605       66606607 608609   610    611  612  613  614       67615616 617618   619    620  621  622  623       68624625 626627   628    629  630  631  632       69633634 635636   637    638  639  640  641       70642643 644645   646    647  648  649  650       71651652 653654   655    656  657  658  659       72660661 662663   664    665  666  667  668       73669670 671672   673    674  675  676  677       74678679 680681   682    683  684  685  686       75687688 689690   691    692  693  694  695       76696697 698699   700    701  702  703  704       77705706 707708   709    710  711  712  713       78714715 716717   718    719  720  721  722       79723724 725726   727    728  729  730  731       80732733 734735   736    737  738  739  740       81741742 743744   745    746  747  748  749       82750751 752753   754    755  756  757  758       83759760 761762   763    764  765  766  767       84768769 770771   772    773  774  775  776       85777778 779780   781    782  783  784  785       86786787 788789   790    791  792  793  794       87795796 797798   799    800  801  802  803       88804805 806807   808    809  810  811  812       89813814 815816   817    818  819  820  821       90822823 824825   826    827  828  829  830       91831832 833834   835    836  837  838  839       92840841 842843   844    845  846  847  848       93849850 851852   853    854  855  856  857       94858859 860861   862    863  864  865  866       95867868 869870   871    872  873  874  875       96876877 878879   880    881  882  883  884       97885886 887888   889    890  891  892  893       98894895 896897   898    899  900  901  902       99903904 905906   907    908  909  910  911       100912913 914915   916    917  918  919  920       101921922 923924   925    926  927  928  929       102930931 932933   934    935  936  937  938       103939940 941942   943    944  945  946  947       104948949 950951   952    953  954  955  956       105957958 959960   961    962  963  964  965       106966967 968969   970    971  972  973  974       107975976 977978   979    980  981  982  983       108984985 986987   988    989  990  991  992       109993994 995996   997    998  999  1000 1001      1101002 1003  1004 1005           1006   1007 1008 1009 1010      1111011 1012  1013 1014           1015   1016 1017 1018 1019      1121020 1021  1022 1023           1024   1025 1026 1027 1028      1131029 1030  1031 1032           1033   1034 1035 1036 1037      1141038 1039  1040 1041           1042   1043 1044 1045 1046      1151047 1048  1049 1050           1051   1052 1053 1054 1055      1161056 1057  1058 1059           1060   1061 1062 1063 1064      1171065 1066  1067 1068           1069   1070 1071 1072 1073      1181074 1075  1076 1077           1078   1079 1080 1081 1082      1191083 1084  1085 1086           1087   1088 1089 1090 1091      1201092 1093  1094 1095           1096   1097 1098 1099 1100      1211101 1102  1103 1104           1105   1106 1107 1108 1109      1221110 1111  1112 1113           1114   1115 1116 1117 1118      1231119 1120  1121 1122           1123   1124 1125 1126 1127      1241128 1129  1130 1131           1132   1133 1134 1135 1136      1251137 1138  1139 1140           1141   1142 1143 1144 1145      1261146 1147  1148 1149           1150   1151 1152 1153 1154      1271155 1156  1157 1158           1159   1160 1161 1162 1163      1281164 1165  1166 1167           1168   1169 1170 1171 1172      1291173 1174  1175 1176           1177   1178 1179 1180 1181      1301182 1183  1184 1185           1186   1187 1188 1189 1190      1311191 1192  1193 1194           1195   1196 1197 1198 1199      1321200 1201  1202 1203           1204   1205 1206 1207 1208      1331209 1210  1211 1212           1213   1214 1215 1216 1217      1341218 1219  1220 1221           1222   1223 1224 1225 1226      135______________________________________ 
    
     
         ______________________________________FM RANGE______________________________________1227   1228      1229   1230     1231 1361232   1233      1234   1235     1236 137______________________________________ 
    
     The program for memory IS 15 is listed for long-wave and AM ranges. It is valid correspondingly for the short-wave and FM range. 
     By way of the program of memory IS 15, the outputs have been determined which must show the same binary numbers for certain address groups. 
     In detail the two purposes for memory IS 15 are as follows: 
     1. The influence of changes of the oscillator frequency of the receiver upon the accurate readout of the indicators IS 18, 19, 20, 21 is to be eliminated. This is facilitated by using the free addresses in memory IS 15. 
     The broadcasting station &#34;Deutschlandfunk&#34; [Radio Germany] in the long-wave range broadcasts at 155 kHz. The lowest frequency in this range is 150 kHz. By way of the presetting it was achieved that the binary counters IS 8, 9, 10 show a binary zero for the lowest frequency at their outputs pins 11, 12, 13, 14. For the broadcasting frequency of 155 kHz counters IS 8, 9, 10 should show a binary 5 at their output. The next broadcasting station &#34;Radio France&#34; broadcasts at 164 kHz. At this frequency the counters IS 8, 9, 10 should output a binary 14. These figures 5 and 14 are simultaneously the address numbers of memory IS 15. Between these two addresses, addresses 6, 7, 8, 9, 10, 11, 12 and 13 remain free. 
     When the frequency of the oscillator of the receiver is lower 1 kHz, the following is valid: counters IS 8, 9, 10 at the broadcasting station &#34;Radio France&#34; now show a binary 13. Using the program of memory IS 15, it was achieved that the output of memory IS 15 contains the same number for address 13 as for address 14. In this manner it was achieved that the indicators IS 18, 19, 20, 21 can still show the same station name with frequency discrepancies of ±4 kHz. 
     2. Memory IS 15 determines the address of memory IS 17 in which are stored the names of the broadcasting stations. 
     The station names consist of several letters. Memory IS 7 was programmed in such a manner that 16 positions are available for every name. The name of the first station is located at addresses 0 through 15. Addresses 16 through 31 are scheduled for the second station and so forth. 
     The programming of memory IS 17 is listed in the following table: 
     
         ______________________________________RunningNo.    Addresses Name          Country______________________________________LONG-WAVE BAND1.     15-0      Radio Germany --2.     31-16     Radio France  France3.     47-32     Moscow        USSR4.     63-48     Voice of the GDR                          German Democratic                          Republic (GDR)5.     79-64     Motala        Sweden6.     95-80     Warsaw        Poland7.     111-95    Radio Germany --8.     127-112   Monte Carlo   Monaco9.     143-128   Warsaw        Poland10.    159-144   Luxembourg    Luxembourg11.    175-160   Kalundborg    Denmark12.    191-176   Lahti         Finland13.    207-192   Moscow        USSR14.    223-208   Prague        Czechoslovakia15.    239-224   Minsk         USSRAM RANGE16.    255-240   Innsbruck     Austria17.    271-256   Leipzig       GDR18.    287-273   Budapest      Hungary19.    303-288   Radio Germany --20.    319-304   Neubrandenburg21.    335-320   Berlin West22.    351-336   Schwerin      GDR23.    367-352   Vienna        Austria24.    383-368   Frankfurt     Germany25.    399-384   Potsdam       GDR26.    415-400   Sarajevo      Yugoslavia27.    431-416   Brussel       Belgium28.    447-432   Berlin West29.    463-448   Prague        Czechoslovakia30.    479-464   London        Great Britain31.    495-480   Berlin East   GDR32.    511-496   Southwest Radio                          Germany33.    527-496   Marseille     France34.    543-528   Beograd-Berlin35.    559-544   Berlin East   GDR36.    575-560   Andorra37.    591-576   Rennes        France38.    607-592   Langenberg    Germany39.    623-608   Putbus        GDR40.    639-624   Warsaw        Poland41.    655-640   Lopik         Netherlands42.    671-656   Radio Germany --43.    687-672   Sottens       Sweden44.    703-688   Stockholm     Sweden45.    719-794   Burg          GDR46.    735-720   Limoges       France47.    751-736   Munich        Germany48.    767-752   Skopye        Yugoslavia49.    783-768   Warsaw        Poland50.    799-784   Hanover       Germany51.    815-800   Nancy         France52.    831-816   Rome          Italy53.    847-832   Berlin West54.    863-848   Paris         France55.    879-864   Frankfurt     Germany56.    895-880   Wachenbrunn   GDR57.    911-896   Antalya       Turkey58.    927-912   Milan         Italy59.    943-928   Nurenburg     Germany60.    959-944   Ljubljana     Yugoslavia61.    975-960   Wolvertem     Belgium62.    991-976   Bremen        Germany63.    1007-992  Toulouse      France64.    1023-1008 Brunn         Czechoslovakia65.    1039-1024 Nikosia       Cypress66.    1055-1040 Hamburg       Germany67.    1071-1056 Goteborg      Sweden68.    1087-1072 Berlin West69.    1103-1088 Schwerin      GDR70.    1119-1104 Lopik         Netherlands71.    1135-1120 Wolfsheim     Germany72.    1151-1136 Linz          Austria73.    1167-1152 Lisbon        Portugal74.    1183-1168 Dresden       GDR75.    1199-1184 Iasi          Romania76.    1215-1200 Kalundborg    Denmark77.    1231-1216 Lille         France78.    1247-1232 Katowitze     Poland79.    1263-1248 Tirana        Albania80     1279-1264 Pressburg     Czechoslovakia81.    1295-1280 Berlin AFN82.    1311-1296 Bari          Italy83.    1327-1312 Stara Zagora  Bulgaria84.    1343-1328 Zagreb        Yugoslavia85.    1359-1344 AFN86.    1375-1360 Cluj          Romania87.    1391-1376 Strassburg    France88.    1407-1392 Plauen        GDR89.    1423-1408 Stockholm     Sweden90.    1439-1424 Szolnok       Hungary91.    1455-1440 Munich        Germany92.    1471-1456 Wroclaw       Poland93.    1487-1472 Tiran         Albania94.    1503-1488 Sofija        Bulgaria95.    1519-1504 Prague        Czechoslovakia96.    1535-1520 Kiev          USSR97.    1551-1536 Tripolis      Libia98.    1567-1552 Warsaw        Poland99.    1583-1568 Radio Germany --100.   1599-1584 Strassburg    France101.   1615-1600 Prague        Czechoslovakia102.   1631-1616 London        Great Britain103.   1647-1632 Warsaw        Poland104.   1663-1648 Stavanger     Norway105.   1679-1664 Nauen         GDR106.   1695-1680 Rome          Italy107.   1711-1696 Lisnagarvey   Great Britain108.   1727-1712 Nica          France109.   1743-1728 Berlin East   GDR110.   1759-1744 Krakow        USSR111.   1775-1760 Lille         France112.   1791-1776 Kaunas        USSR113.   1807-1792 Lushnye       Albania114.   1823-1808 Ajaccio       France115.   1839-1824 Pristina      Yugoslavia116.   1855-1840 Saarbruecken  Germany117.   1871-1856 Bernburg      GDR118.   1887-1872 Luxembourg    Luxembourg119.   1903-1888 Berlin West120.   1919-1904 Tirana        Albania121.   1935-1920 Monte Carlo   Monaco122.   1951-1936 Vienna        Austria123.   1967-1952 AFN124.   1983-1968 Leningrad     USSR125.   1999-1984 Stargrad      Poland126.   2015-2000 Antwerpen     Belgium127.   2031-2016 Kosice        Czechoslovakia128.   2047-2032 Vatikan       Vatikan129.   2063-2048 Radio Germany --130.   2079-2064 Vinnitza      USSR131.   2095-2080 Nizza         France132.   2111-2096 Sfax          Tunisia133.   2127-2112 Weida         GDR134.   2143-2128 Klagenfurt    Austria135.   2159-2144 Langenberg    Germany136.   2175-2160 Potsdam       GDRSHORT-WAVE RANGE137.   2192-2176 . . .         . . .______________________________________ 
    
     Together with a program for memory IS 17, the station names and the abbreviation for the country in which the station is located were inputted into memory IS 17. 
     The letters of the station name were listed in reverse sequence since indicators IS 18, 19, 20, 21 show the letters in reverse order as will be illustrated by way of an example: 
     
         ______________________________________Addresses: 15-14-13-12-11-10--9--8--7--6--5--4--3--2--1--0Name:      DEUTSCHLANDFUNK      (Radio Germany)______________________________________ 
    
     Described below is the control of the memory IS 17 and the indicators IS 18, 19, 20, 21 by way of the binary counter IS 14 and the demultiplexer IS 16. 
     In order to be able to indicate these 16 positions for every name of a station, the first four addresses of memory IS 17 (pins 8, 7, 6, 5) are connected with the outputs of counter IS 14 (pins 14, 13, 12, 11). The outputs of memory IS 15 are connected with the address inputs of memory IS 17 as follows: output pin 9(Do) with the input pin 4(a4), output pin 10(d1) with input pin 3(a5), and so forth. 
     Binary counter IS 14 and the 2-bit demultiplexer IS 16 control the multiplex operation of memory IS 17 and the indicators IS 18, 19, 20, 21. Binary counter IS 14 simultaneously controls the address of memory IS 17 (pins 8, 7, 6, 5). At the outputs of memory IS 17 the letters are generated in ASCII-Code which are decoded and shown by indicators IS 18, 19, 20, 21. 
     It was already mentioned that the counters IS 8, 9, 10 should issue a binary zero at their outputs for the lowest frequency in the wave range. In this case, the memory IS 15 must also show a zero at its outputs which is achieved by the program of memory IS 15. 
     If a binary zero is present at the outputs of memory IS 15, the 4-bit binary counter IS 14 triggers the first 16 addresses of memory IS 17 in sequence. With these 16 addresses the first station name is shown. 
     The following is valid for the case that a binary zero is at the outputs of memory IS 15: 
     If a zero is also at the outputs of binary counter IS 14, the first address of memory IS 17 is triggered. The output of the integrated circuit IS 16 (pin 9) and at a low level is triggered simultaneously since the outputs of counter IS 14 (pins 12, 11) are connected with the inputs of IS 16 (pins 13, 3). The low level signal at the output of the demultiplexer IS 16 (pin 9) turns on the indicator IS 21. The outputs of counter IS 14 (pins 14, 13) trigger the first address of the indicator IS 21, since the outputs of counter IS 14 (pins 14, 13) are connected with the address inputs of the indicators IS 21, 20, 19, 18 (pin 5 and pin 4). 
     With the next pulse a binary one will appear at the output of counter IS 14 (pin 14=high level). At this point the second address of memory IS 17 and the second position of indicator IS 21 are triggered. The output of the demultiplexer IS 16 (pin 9) remains unchanged, since the outputs of counter IS 14 (pin 12, 11) carry low level signal. 
     When the output of counter IS 14 shows a binary 2, the third address of memory IS 17 and the third position of indicator IS 21 are triggered. The output of the demultiplexer IS 16 (pin 9) further remains at a low level. 
     When a binary 3 appears at the output of the counter IS 14, the fourth address of memory IS 17 and the fourth position of indicator IS 21 are triggered. The output pin 9 of the demultiplexer IS 16 continues to remain at a low level. 
     When the output the counter IS 14 is set to a binary 4, the fifth address of memory IS 17 and the input of the demultiplexer IS 16 (pin 13) are triggered. At the output of the demultiplexer IS 16 (pin 10) the level is changed from high to low whereby the second indicator IS 20 is activated. The outputs of the counter IS 14 (pin 14, 13) were switched to a low level at this instant whereby the first position of the indicator IS 20 is triggered. Furthermore, the address of memory IS 17 is triggered in sequence to 15. After number 15, the counter IS 14 again counts from 0 to 15. 
     If a binary 2 is at the output of the memory IS 15, the counter now triggers the addresses from 32 through 47 in sequence. The third station name is stored at addresses 32 to 47 of memory IS 17. The program of the memory IS 17 is listed above. 
     It may be seen from the program of memory IS 15 that the addresses from 0 to 135 were occupied by the long-wave range. For the medium-wave or AM range, the addresses from 136 to 1226 are occupied. 
     For the short-wave range, the addresses from 1227 to 2048 are available. 
     The capacity of the memory IS 17 (4K-byte) suffices for 256 station names with 16 letters each. With a different choice for memory IS 17, greater storage capacities can be achieved if so desired. 
     The arrangement according to this invention facilitates the inputting and automatic indication of all station names with the abbreviation of the country in which the station is located as a function of the oscillator frequency of the receiver. 
     The solution is listed for a 16-digit 16-segment LED indicator. Advantageously, the indicator may also be constructed with four 5×7 grid LED indicators. 
     FIG. 2 shows an added circuit which facilitates inputting of other station names in addition to the station names retained in the EPROM memory IS 17 which can be shown on the indicator on an alternative basis. With this it is possible to determine other station names instead of stations which are indicated with a given set frequency instead of the originally scheduled frequency. This means that if a station becomes audible upon tuning which does not correspond with the station, the name or identification of which is indicated, it is possible to program a name into the system which is to appear instead of the undesired designation. The additional station name is retained in a read/write memory which can be switched on instead of the corresponding permanent memory. 
     The illustrated arrangement shown in FIG. 2 comprises the counter IS 14, the memory IS 15, the demultiplexer IS 16 and the memory IS 17. The external wiring corresponds with that shown in this figure with the address lines always being shown combined to one (greatly expanded) line. Also included is a RAM memory IS 22 (128×1 bit), a latch IS 23, as well as a 2K-byte RAM memory IS 24. 
     For every memory range for a station name in the memory IS 17, the memory IS 22 has a correlated memory bit which can be individually set or reset for every memory position addressed together with the memory IS 17 via memory IS 15 and on external switching device (arrow I). In this manner the memory positions of those stations can be &#34;marked&#34; where the chosen station name does not concur with the permanently inputted name. If a bit is &#34;set&#34; at a memory position, a signal is passed to the RAM memory IS 24 via the latch IS 23 which activates the memory IS 24, whereas EPROM memory IS 17 is maintained in an inactive state. In this case the lines leading to the indicator units IS 18 to IS 21 (which are also shown combined in FIG. 2) carry the signals triggering the indication of an alternative station name. If the corresponding bit is not set in the memory IS 22, the permanently stored name which is contained in the EPROM memory IS 17 will be indicated. The alternative station names are inputted into the RAM memory IS 24 by the user himself via a nonillustrated alphanumeric inputting means symbolized by arrow II when the memory is addressed by setting the corresponding station. 
     The arrangement shown in FIG. 2 consisting of constructing elements IS 22 through 24 can, in a corresponding manner, also be applied to the memory IS 15 instead of the EPROM memory IS 17. In the case of this configuration, not the station names directly but their correlation with indicated frequencies for individual stations are altered so that the alternative memory space in a RAM memory does not have to be changed for the entire station name but only for its address in the EPROM memory IS 17. This facilitates use of a smaller RAM memory IS 24. In the case of the last configuration a listing of all radio and/or television programs audible within a large area is maintained preferably in memory IS 17 wherein the accurate correlation for regional requirements is either implemented by complete exchange of memory IS 15 or by reprogramming of individual correlation addresses by way of a correspondingly wired RAM memory IS 22. 
     With a second version of the invention various correlations between set frequencies and indicated station names can be realized as a function of the local installation of the receiver. If the receiver, for instance, is to be operated at two different locations, memory IS 24 in FIG. 2 functions as a second EPROM memory in which the station names for a second location are stored. In a preferred version of this invention, multiples of those memory ranges are scheduled in this manner which are correlated with frequency ranges subjected to pronounced changes in case of a change in location, that is, particularly referring to the FM and TV areas. Instead of the latch IS 23, a converter must be used in these cases which can be operated mamually and which corresponding with the receiver location either activates a memory IS 17 or IS 24 with the station names to be received at the respective frequencies as a function of its wiring status. This conversion may be implemented corresponding with a code correlated with the respective receiving area, such as Zip Codes. 
     With the last version of this invention mentioned above, it is also particularly advantageous if--depending upon the location of the receiver--changes are made in memory IS 15 which cause the addressing correlation instead of making alterations in the memory containing these station names. 
     In the last described functioning mode, the arrangement shown from memory IS 17 in FIG. 2 would be correlated with memory IS 15. Thus, memory IS 17 would contain the names of all radio programs to be received within an extended area whereas the correlation of the receiving station frequencies with the respective station names would then be carried out via convertible memory IS 15. In this manner it may be achieved that the memories which can be converted as a function of the regional location of the receiver can be designed as small as possible. 
     The invention can thus be realized in the most diverse versions which are adjusted to the respective purpose of application in the planned receiver type.