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Overlap Blocking Filter Pass 21-30
Product Code: PROOBF1A
- Overlap blocking filter Ch.21-30
- Used for blocking unwanted signals
- F-Type
- 1 input 1 output
Product Description
Overlap Blocking Filter Pass 21-30
A range of UHF band-pass 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 band-pass filters can provide a quick, simple and cost effective solution, saving installers frequent call-backs.
Other Applications:
The entire range offers excellent cut-off below 470MHz and will help with problems from TETRA, telemetry and 70cm 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.
Features:
- Optimised pass-bands 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 75O match throughout the pass-band.
- DC blocked, no damage if inadvertently line-powered (24VDC max).
- Optional weatherproof outdoor housing available.
- Equipotential bonding terminal.
Technical Information:
| Product Code | Channels | Freq. | Lower | Upper1 | Insertion loss2 | Stopband Rejection3 | Conn. |
PROOBF1A | 21 - 30 | 470 - 550MHz | DC - 438MHz | 578 - 1600MHz | <3dB | >30dB | F |
PROOBF1B | 39 - 52 | 614 - 726MHz | DC - 578MHz | 762 - 1600MHz | <3dB | >30dB | F |
PROOBF1C | 48 - 62 | 686 - 806MHz | DC - 650MHz | 920 - 1600MHz | <3dB | >27dB | F |
PROOBF1E | 39 - 62 | 614 - 806MHz | DC - 562MHz | 920 - 1600MHz | <3dB | >27dB | F |
PROMHDCASE-S | Case for external installations | ||||||
1. Specified stop-band rejection is typically maintained to above 2GHz (but is not guaranteed above 1.6GHz).
2. Insertion loss may increase slightly at the pass-band edges, but will not exceed 4dB.
3. Typical stop-band rejection is around 35 to 40dB except close to the band edges.
Technical Specification
IEC or F Type
F-Type
Width
20mm
Depth
48mm
Height
80mm
Weight
0.04kg
Frequently Asked Questions
25/02/2025
11/02/2025
Amazingly quick de.ivery. Ordered at the weekend , arrived on Monday !
09/02/2025
Product as described and arrived on time, kept informed on progress throughout
04/02/2025
Somewhat confusing with the emails I received not identifying Blake UK as the sender easily
04/02/2025
Quick service and Quick delivery
Google Company Reviews
08/03/2025
Prompt delivery, hassle free purchase. I would use this company again.
02/03/2025
very good service
27/02/2025
Fantastic customer service - Thanks
17/02/2025
Cheapest on the net and received within in two days
14/02/2025
Great product and good service nice to find what you need
I’m pleased with the ærial overall. I did have to fix two separate issues though… 1. Many of the elements were bent, some quite badly. Happily they all bent straight again without any fatigue fracture. 2. Many of the elements were not seated properly in the booms. In one case, a vertical element was touching one on the other boom. I was able to pull the unseated ones out to seat better but I’m not sure how long they’ll stay like this.