40
System setting of M17
VCDM0 (default value: 68)
BIT Item
0
System switch: 0 : normal identify mode 1 : weak signal identify mode
1
White peak suppress: 0: on 1: off
2,3
ABL gain
00: -0.74v 01: -0.64v 10: -0.37v 11: -0.12v
4,5
ABL start point
00: -0.01v 01: -0.11v 10: -0.3v 11: -0.45v
6
CW-SW: TB1238N, pin 29 Fsc CW output 0 : AUTO, 1 : 4.43M
7
In force system mode, the status of color killer when weak signal
0: on 1: off
VCDM1 (default value: 00)
BIT
Item
0
Blanking: 0: on 1: off
1,2,3,4,5 V-Mute timing: = 200ms + 8ms ×Data
6
Base band filter in NTSC system: 0: on, 1: off
7
VMOD
VCDM2 (default value: 40 for 38MHz IF, 30 for 38.9MHz IF)
BIT
Item
0
AFT-mute: 0: on 1: off
1
SECAM-ADJ: 0: SECAM correction off 1: SECAM correction on
2
TB1238N_VMOD
3
PIF VCO ADJ 0: follow bit 0 1: manual adjust
6,5,4
IF frequency:
111: 33.9MHz 110: 33.95MHz 101: 34.47MHz 100: 38MHz
011: 38.9MHz 010: 39.5MHz 001: 45.75MHz 000: 58.75MHz
7
No use
MODE0
BIT
Item
0
0: normal AV 1: SCART
1
0: English 1: E Chinese
2
Low Noise Amp. at tuner: 0: off 1: on
3
No use
4, 5, 6,
7
Muting time when power on:
8ms ×16 ×data (max. 1920ms)
