Satellite frequency to L-band conversion
Satellite signals (at C-band and Ku-band frequencies) are converted down to L-band in the focal point of many dish antennas by a Low-Noise Block Down-Converter (LNB). In the United States, the receivers for domestic satellites usually use the conversion shown below. The Direct Broadcast Satellite receivers (Dish, Directv) use a different format. [What are the frequency limits of the microwave bands designated with letters such as C, Ku and L?]
| L-band |
C-band |
Ku-band |
| Freq. (MHz) |
Freq. (MHz) |
Channel |
Freq. (MHz) |
| 950 |
4200 |
|
11700 |
| 970 |
4180 |
24 |
11720 |
| 990 |
4160 |
23 |
11740 |
| 1010 |
4140 |
22 |
11760 |
| 1030 |
4120 |
21 |
11780 |
| 1050 |
4100 |
20 |
11800 |
| 1070 |
4080 |
19 |
11820 |
| 1090 |
4060 |
18 |
11840 |
| 1110 |
4040 |
17 |
11860 |
| 1130 |
4020 |
16 |
11880 |
| 1150 |
4000 |
15 |
11900 |
| 1170 |
3980 |
14 |
11920 |
| 1190 |
3960 |
13 |
11940 |
| 1210 |
3940 |
12 |
11960 |
| 1230 |
3920 |
11 |
11980 |
| 1250 |
3900 |
10 |
12000 |
| 1270 |
3880 |
9 |
12020 |
| 1290 |
3860 |
8 |
12040 |
| 1310 |
3840 |
7 |
12060 |
| 1330 |
3820 |
6 |
12080 |
| 1350 |
3800 |
5 |
12100 |
| 1370 |
3780 |
4 |
12120 |
| 1390 |
3760 |
3 |
12140 |
| 1410 |
3740 |
2 |
12160 |
| 1430 |
3720 |
1 |
12180 |
| 1450 |
3700 |
|
12200 |
This conversion is valid when the local oscillator frequency is 5150 MHz for C-band and 10750 MHz for Ku-band.
John Neuhaus
john@jneuhaus.com
Sat, Sep 21, 2002