Aus TV History | Technical

Ch	Frequency (MHz)
1	49-56
2	63-70
3	85-92
4	132-139
5	139-146
6	174-181
7	181-188
8	188-195
9	195-202
10	209-216

1956-1962

When Australian television first started in 1956, Australia used a 10 channel system on the Very High Frequency (VHF) band. In 1959 Ultra High Frequency (UHF) was planned between 500 - 855MHz in 7MHz channels, although it took 21 years for the first UHF television station to start.

Ch	Frequency (MHz)
0	45-52
1	56-63
2	63-70
3	85-92
4	94-101
5	101-108
5a	137-144
6	174-181
7	181-188
8	188-195
9	195-202
10	208-215
11	215-222
12	222-229

1962-1980

In 1962 the Goverment ended FM radio tests and announced a new channel plan. The old 10 channel system was replaced with a new 13 channel plan.
Notice that channels 2, 3, 6, 7, 8, 9 and 10 (the only channels in use at the time) used the same frequency as the previous plan, so as to not interfere with older television sets.
Ch. 12 was added in the 80's and the gap between 9 & 10 is now called 9a.

Analogue Colour Television Broadcast Standards

Channel Width	7MHz vestigal sideband trans.
Vision Carrier	1.25MHz above lower frequency edge of channel
Primary Sound Carrier	5.5Mhz above lower carrier
Secondary Sound Carrier	242.1875kHz above primary sound carrier
Vision Modulation	Negative amplitude modulation
Lines per Picture	625 Lines, interlaced 2:1
Line Frequency	15625Hz
Field Frequency	50Hz
Colour Subcarrier Frequency	4.43361875Mhz
Aspect Ratio	4:3
Horizontal Sync Pulse	100% carrier amplitude
Front Porch	1.3 - 1.8us
Back Porch	Line blanking interval - (front porch + sync pulse)
Line Blanking Interval	11.8-12.3us
Black & Blanking Level	76% peak carrier level
White Level	20% peak carrier level
Pre-equalisation Pulse Interval	2.5H (H=line period, 64 us)
Post-equalisation Pulse Interval	2.5H
Field Sync Pulse Interval	2.5H
Field Blanking Interval	2.5 + 12us
Ratio peak vision to peak Sound carrier	Single sound carrier systems: 10dB Dual Sound carrier systems: Ch1: 13dB, Ch2:20dB
Sound Modulation	FM
Sound Devation	+/-50kHz
Audio Pre-emphasis	50us

Australian Television Channels

Ch	Vision Carrier (MHz)	Primary Sound Carrier (MHz)	Ch	Vision Carrier (MHz)	Primary Sound Carrier (MHz)
0	42.25	51.75	44	639.25	644.75
1	57.25	62.75	45	646.25	651.75
2	64.25	69.75	46	653.25	658.75
3	86.25	91.75	47	660.25	665.75
4	95.25	100.75	48	667.25	672.75
5	102.25	107.75	49	674.25	679.75
5a	138.25	143.75	50	681.25	686.75
6	175.25	180.75	51	688.25	693.75
7	182.25	187.75	52	695.25	700.75
8	189.25	194.75	53	702.25	707.75
9	196.25	201.75	54	709.25	714.75
10	209.25	214.75	55	716.25	721.75
11	216.25	221.75	56	723.25	728.75
28	527.25	532.75	57	730.25	735.75
29	534.25	539.75	58	737.25	742.75
30	541.25	546.75	59	744.25	749.75
31	548.25	553.75	60	751.25	756.75
32	555.25	560.75	61	758.25	763.75
33	562.25	567.75	62	765.25	770.75
34	569.25	574.75	63	772.25	777.75
35	576.25	581.75	64	779.25	784.75
39	604.25	609.75	65	786.25	791.75
40	611.25	616.75	66	793.25	798.75
41	618.25	623.75	67	800.25	805.75
42	625.25	630.75	68	807.25	812.75
43	632.25	637.75	69	814.25	819.75

Purple = VHF Band I or VL
Blue = VHF Band II (FM Radio)
Light Purple = VHF Band III or VH
Green = UHF Band IV
Red = UHF Band V

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