PROCEPTION Inline Filter Group C (48-60)
A new range of UHF bandpass filters from Proception, intended for blocking unwanted
reception of transmissions from an adjacent region.
The introduction of high-power digital transmissions has led to problems with some receivers selecting multiplexes from out-of-area transmitters, leaving confused viewers watching the wrong regional services, or even listening to the wrong language!
Although this problem should be solved in the longer term by receiver developments, the use of bandpass filters can provide a quick, simple and cost effective solution, saving installers frequent call-backs.
Key features
- Optimised passbands cover most UK requirements in just four versions
- Good out-of band rejection helps block TETRA and GSM, also LTE (4G), depending on model
- 'F' type connectors for good screening factor, helping prevent leakage around the filter.
- Good 75 Ω match throughout the passband
- DC blocked - no damage if inadvertently linepowered (24 V DC max)
- Equipotential bonding terminal
Other applications: The entire range offers excellent cut-off below 470 MHz and will help with problems from TETRA, telemetry and 70 cm amateur band transmissions. Above channel 62 all versions will help solve GSM mobile phone interference problems, while the 'A' and 'B' models will additionally help suppress the forthcoming LTE (4G) signals.
Passband channels: 48 - 60
Passband frequencies: 614 - 783MHz
Stopband frequencies: Lower: DC - 650MHZ, Upper*: 920 - 1600MHZ
Insertion loss (passband): < 3 dB**
Stopband rejection (relative): > 30 dB*** (> 27 dB for upper stopbands of 'C' and 'E' versions)
Power-pass?: No (DC-blocked)
Connectors: Type-F (IEC 61169-24)
EMC standard: EN 50083-2:2006 (Class B)
*Specified stopband rejection is typically maintained to above 2 GHz (but is not guaranteed above 1.6 GHz).
**Insertion loss may increase slightly at the passband edges, but will not exceed 4 dB.
***Typical stopband rejection is around 35-40 dB except close to the band edges.
