JVC DLA-HD2K-SYS IR Remote Control for HD2K electronics unit -- specifications - Page 4

13.2.25 Letterbox Button Direct access to select the picture in letterbox aspect ratio 13.3 13.3.1 13.3.2 13.3.3 Remote Control Timing Definitions: The modulated carrier is derived from a 432KHx clock and is 1/12 of the frequency with a 1/3 duty cycle. When data is transmitted repeatedly, the frame cycle is 113.7mS or 256T periods. A frame consists of a two-bit sync code, a one-bit toggling control code, a five-bit system code (address) and a six-bit data code. 1 Frame 256T 256T 256T 256T 1 Frame: S0 S1 TG C0 C1 C2 C3 C4 D0 D1 D2 D3 D4 S0, S1 = Sync (2 bit) TG = Toggle (1 bit) C0-C4 = Custom address code (1 bit, see below) D0-D4 = Data code (5 bit, see table below) Data item Data off time Data on time Data period (0) Data period (1) Frame output cycle Time (sec.) 0.888mS 0.888mS 3.552mS 3.552mS 113.7mS Time (no. of period) 2T 2T 4T 4T 256T 17