BAND PASS FILTERS
FOR SOUND
TRANSMISSION ON TV LINKS
It is often desirable for operators of video links to utilise the spare
bandwidth above the video band to carry radio or telephony channels. These channels are
modulated onto sub-carriers, often in pairs. The band pass filters offered in this range are
for the separation of the sub-carrier channels from the video band. They are
designed on centre frequencies of 6.20, 6.80, 7.02, 7.50, 8.065, 8.59 and 10.70 MHz.
The passband and stopband widths in these band pass filters are shown below. The group delay is approximately
parabolic in shape about the centre frequency. Similar filters with other centre
frequencies, bandwidths or impedances may be available on request.
|
Order Code |
Centre Freq. |
Passband Width |
Stopband |
Bandwidth |
|
|
|
MHz |
MHz |
30 dB |
40 dB |
|
|
|
|
|
|
|
|
|
BN0620A |
6.200 |
0.25 |
0.80 |
1.00 |
|
|
BN0680A |
6.800 |
0.25 |
0.80 |
1.00 |
|
|
BN0702A |
7.020 |
0.25 |
0.80 |
1.00 |
|
|
BN0750A |
7.500 |
0.25 |
0.80 |
1.00 |
|
|
BN0807A |
8.065 |
0.25 |
0.80 |
1.00 |
|
|
BN0859A |
8.590 |
0.25 |
0.80 |
1.00 |
|
|
|
|
|
|
|
|
|
BW0620A |
6.200 |
0.50 |
1.50 |
2.00 |
|
|
BW0680A |
6.800 |
0.50 |
1.50 |
2.00 |
|
|
BW0702A |
7.020 |
0.50 |
1.50 |
2.00 |
|
|
BW0750A |
7.500 |
0.50 |
1.50 |
2.00 |
|
|
BW0807A |
8.065 |
0.50 |
1.50 |
2.00 |
|
|
BW0859A |
8.590 |
0.50 |
1.50 |
2.00 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Impedance |
75
ohms |
|
Temperature Range |
0°C to 70°C |
|
Aqueous Washable |
No |
|
Package |
DR00009B |
|
