Technical data

ManualsBrandsAlpermann+Velte ManualsComputer equipmentTC 30 AS-GPS

Installation & Operation Manual GM-TTT

Page 77

*1 DATA 1: Bit 7 = 1

Bit 6 = 0

Bit 5 = 1 Bits 7..5 = Device type

Bit 4

Bit 3

Bit 2: 1 = Colour lock module installed, 0 = not installed

Bit 1: 1 = Serial interface module installed, 0 = not installed

Bit 0: 1 = VITC generator module installed, 0 = not installed

DATA 2: BCD firmware version

*2 DATA 1 = BCD frames

DATA 2 = BCD seconds

DATA 3 = BCD minutes

DATA 4 = BCD hours

*3 DATA 1 = BG1/2 user bits

DATA 2 = BG3/4 user bits

DATA 3 = BG5/6 user bits

DATA 4 = BG7/8 user bits

*4 DATA 1 = BCD day

DATA 2 = BCD month

DATA 3 = BCD year (units, tens)

DATA 4: is ignored when setting, during return = internal time zone:

$00 = UTC or not defined

$01 = normal time

$02 = Daylight Saving Time

*5 DATA 1...4 = time as for *2, DATA 5-8 = user bits as for *3.

*6 The “flag“ characterises the first/second half of each frame, it is = 0 in the first and = 1

in the second half (corresponding to the VITC field identification). It is sent as bit 7 of

DATA 4, i.e. as the most significant bit of the hours. To ensure optimum usability, the

baud rate should be selected as high as possible. The time at which the command was

completely received defines the value of the “flag“ in the return message.

*7 The ‘Pre-set time of the time code‘ command is only effective, when the start operating

mode is selected. The ‘Pre-set binary groups of the time code‘ command has the same

effect as the SET USER menu function. The time and binary groups of the generated time

code may be set frame by frame. Internally, the LTC generator accepts any set data

within the t1 to t2 range (t1/t2 about 10/13 ms at 25 frames, 9/12 ms at 30 frames),

this corresponds to the line range 160 - 200 (625/50 PAL) or 140 - 190 (525/60 NTSC)

in case of video synchronisation. In this range, the last byte of the command should not

be received, if frame-accurate setting has to be achieved. If the last byte of the

command is received within the range specified in the diagram, the set data are safely

generated to supply frame 3 for example.

Frame 2

Video

LTC

1. Field 2. Field

Frame 1

Data->Frame 3

1. 2. 1. 2.

Frame 3