The TPL048 700 MHz LTE Low-Pass Filter (Channel 48) is engineered to combat interference from LTE / 4G / 5G signals above 694 MHz, ensuring cleaner, stable terrestrial TV reception. It is tuned to accept UHF broadcast frequencies up to Channel 48 and block unwanted mobile transmissions that degrade signal quality. With a compact form factor and DC-passthrough capability, the filter integrates seamlessly into both domestic and communal television distribution systems (MATV, SMATV).

Key Features

Low-pass filter tuned to block LTE / mobile signals above Channel 48 (≈ 694 MHz)
High rejection for frequencies above 700 MHz (e.g. > 50 dB at 730 MHz)
Minimal insertion (through) loss within passband (0.8 dB to 3.0 dB)
Return loss performance:
• 5–40 MHz: ~20 dB
• 40–1000 MHz: ≥ 18 dB (–1.5 dB/Octave slope, minimum 10 dB)
Standard 75-Ω impedance (F-connector interface)
DC passthrough support: up to 30 VDC / 1 A (enables powering of mast amplifiers through the filter)
Compact barrel / tube style design — easy inline installation within coax / antenna lines
Rugged and weather-resistant housing for indoor or sheltered outdoor use

Specifications

Parameter	Value
Model / Part No.	TPL048 (Triax)
Frequency passband	5 MHz to ~694 MHz (up to Channel 48)
Stop / block region	Signals above CH48 / 700 MHz (e.g. 730 MHz rejection > 50 dB)
Insertion (through) loss	0.8 dB to 3.0 dB typical
Return loss	5–40 MHz: ~20 dB; 40–1000 MHz: ≥ 18 dB, slope –1.5 dB/Oct, min 10 dB
Impedance	75 Ω
DC Passthrough	Yes, 30 V DC / 1 A
Connector Type	F-male / F-female (1 in / 1 out)
Mechanical Dimensions	~ 85 mm length × 25 mm width × 25 mm depth (approx)
Weight (net)	≈ 0.068 kg (68 g)
Operating environment	Indoor or sheltered external; standard temperature and humidity ranges (per manufacturer)

Applications

Prevent LTE / 4G / 5G interference in terrestrial UHF TV reception systems (antenna + distribution)
Use in MATV / SMATV systems, communal antenna networks
Inline installation before amplifier / masthead amplifier to block unwanted mobile signals
Suitable for both domestic and commercial broadcasting / reception installations
Upgrades to existing coaxial TV distribution to mitigate mobile-band noise
In areas near mobile towers / within urban deployments where mobile RF “pollution” is prevalent

Triax Networking & TV Equipment