| 摘要 |
PURPOSE:To generate plural program signals by storing a data corresponding to a program signal of plural channels to a memory in advance, and reading it secularly. CONSTITUTION:An ROM14 is stored with each data to generate a patch pattern signal for toner density control, test pattern signal, horizontal synchronizing signal for scanning OFT(optical fiber tube), horizontal valid signal representing a period possible for effective recording in the horizontal scanning period, dynamic focus signal and a blank signal or the like. A signal generating circuit 11 consists of the ROM14, counter 13 and a latch circuit 15. An output of a gate 19 which is opened by the patch pattern signal (c) and a patch ON signal (d) inputted from an external control system is inputted to an OR gate 17 by enable interrupt. Similarly, the test pattern signal (e) and the test ON signal (f) are outputted from a gate 20 and the output is inputted to the OR gate 17 by enable interrupt. This applies also to the blank signal (g) and the horizontal synchronizing signal (j) or the like. |
