| 摘要 |
<p>The system contains a memory for permanent storage of coded scanned values derived from oscillations for the call signals. A control circuit synchronous with the channel scanning, recalls the stored code words from the memory. Preferably the call signal oscillations frequency is in a sensible ratio to the channel scanning frequency. For each appearing sign frequency an independent memory may be provided. Each memory may consists of rows of storage elements, each row containing a code word for scanned values transmission.</p> |
