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FLT225
Primarily
designed for monitoring of radio services above 225 MHz. Good rejection of
paging and FM signals |
| Specifications
Frequency: 225
MHz High Pass Filter
Type: 5-Section High Pass
Impedance: 50 Ohms
Band Pass Loss: < 1 dB @ 500 MHz
< 2 dB @ 1000 MHz
Connectors: BNC (M/F)
Optional connectors: N-type (F/F), TNC (F/F)
Size: 2 x 2 x 1-1/4 Inches
NOTE: Same enclosure as FLT201A above |
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NOTES
 Receive filters are sometimes
necessary to enhance the performance of broadband radios. The basic FM Notch filter, FLT201A
(FLT201A/N, FLT201A/T),
is a very useful complement to any monitoring site were VHF and UHF signals are monitored
on a regular basis. It is specially important in metropolitan and suburban areas were FM
signals are very strong compared to many other radio signals.
Possible problems with
strong signals, such as those from FM radio transmitters are:
1. RF overload
(reduces receiver sensitivity, increases noise)
2. Image mixing (two strong signals
mix and produce a third undesired signal).
The FLT225 is a High-Pass filter
designed primarily for radio monitoring of the military band (225
MHz to 400 MHz). This filter effectively attenuates signals below about
225 MHz, such as Paging (152/158 MHz), FM Radio and other strong business band radios.
The FLT225 uses the same diecast aluminum enclosure as the FM filter above, with
male/female BNC connectors.
FLT02AM
is designed primarily as a BCB (AM radio) reject
filter in the form of a 7-section High-Pass-Filter. It can be used in any
receiver monitoring platform including as a complement to the Stridsberg
Engineering HF multicouplers, MCA102M, MCA104M and MCA108M.
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