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-   -   CM-3201 LTE Filter (New) Attenuation (http://forum.tvfool.com/showthread.php?t=16811)

rabbit73 25-Dec-2020 1:39 AM

CM-3201 LTE Filter (New) Attenuation
 
2 Attachment(s)
Code:

Attenuation of Channel Master NEW CM-3201
LTE Filter for the 14-36 UHF TV Band

Channel  Input  Output  Attenuation
  RF*    dBmV    dBmV      dB

  14    12.1    11.5      0.6
  25    10.5    10.3      0.2
  34    10.3    8.2      2.1
  35    10.1    8.0      2.1
  36    10.2    6.9      3.3 
  37    10.2    3.5      6.7
  38      9.8    -6.0    15.8
  39      9.2  -18.3    27.5
  40      8.5  -31.5    40.0
Input level to filter increased 20 dB
because of increased filter attenuation
  50    29.3  -42.3    71.6
  55    27.1  -46.0    73.1 
* Frequency of measurement for each channel
was video frequency if it had been an NTSC
channel; i.e. 1.25 MHz above low end of channel

Equipment used:
CM-3201 LTE Filter
F-81 Adapter
Blonder Tongue HAVM UHF NTSC Agile Modulator
Sadelco DisplayMax 800 Signal Level Meter

For comparison, a measurement of the filter by videobruce:

http://forum.tvfool.com/attachment.p...4&d=1608870187


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