Thor CATV RF QAM ATSC Analog NTSC PAL Signal Level Meter and tester 5Mhz-870Mhz

The Thor CATV RF QAM ATSC Analog NTSC PAL Signal Level Meter and Tester, model H-RF-MET, is an essential tool for measuring Cable CATV RF signals or signals from off-air ATSC antennas within the 5-870 MHz frequency range. This device is designed to tackle the challenges of RF losses in coaxial networks, which can occur due to splitters and cable length, affecting different frequencies variably based on cable type and rating.

Using this meter during coaxial RF installations is highly beneficial. It allows you to verify the strength of the CATV RF signal, ensuring it is adequate for detection by the TV’s tuner. This not only saves troubleshooting time but also helps identify any video imperfections, ruling out issues related to RF power levels being too low or too high.

For example, modern TVs have a wide RF tuner sensitivity, capable of receiving signals from 0 to 30 dBmv. Signals outside this range are unreadable, preventing the tuner from locating the program. Typically, modulator outputs are around +40 dBmv, but the coaxial cable’s RF insertion loss varies depending on the RF channel frequency. Factors such as distance and cable type often disrupt seamless installations. Significant losses usually occur with RF splitters and taps, each having specific losses.

If the TV’s measured level is between 0 to 30 dBmv, video will display correctly. If it’s higher, an attenuator is needed; if too low, an RF amplifier is required. Here are some common losses for reference:

• H-SP-1×2: 4.5 dB loss
• H-SP-1×4: 7 dB loss
• H-SP-1×8: 12 dB loss
• H-SP-1×16: 12 dB loss
• H-SP-1×12: 14.5 dB loss
• H-SP-1×24: 18 dB loss

For amplifiers, consider models like H-RF-AMP-40 and H-RF-AMP-40-RM. Ensure your installations are smooth and efficient with the H-RF-MET signal level meter.