No Noise Figure or Overload Specs....or Tests. Looking at the Circuit Board, is looks like the GAIN SWITCH simply inserts a 12 dB Attenuator PRIOR to the Amplifier....which would greatly degrade Noise Figure when Lower Gain is enabled. [I would have chosen 6 dB, rather than 12 dB Attenuator....better yet, use Variable Gain, Dual Gate MOSFET.]
FYI: To me it appears that INPUT is on the LEFT, goes through a series of VHF and UHF Full Band Filters to the FM FILTER SWITCH (FM Filter Circuitry just below) and then to the GAIN SWITCH, which Enables or Jumpers Across a Resistor. The signal then goes through an Amplifier (54-700 MHz, NOT separate VHF and UHF Amps) and hence to the OUTPUT on the RIGHT. DC Power from that same connector travels DOWN thru an Inductance Coil to an on-board Voltage Regulator chip and then a series of isolation/voltage reduction Resistors that feed the Amplifier directly above. Note that two of these feeds go through Coils to prevent shorting out the RF signals.
From the Spectrum Analyzer Displays, there is a GAIN SWITCH that selects either 18 dB or 30 dB (consistent with the +/- 2 dB Spec) for BOTH VHF and UHF....that would be VERY useful to prevent Overload. Note that the Preamp does NOT use separate VHF and UHF Sections...which would ALSO have helped to prevent Overload of UHF signals from the more problematic VHF/FM signals.
There ALSO is an FM TRAP SWITCH, which enables an FM Band Filter with about 20 dB Loss (22 dB on 108 MHz Marker Freq), but they have chosen to PASS Ch6, so there is only about 5-6 dB Loss on 88 MHz. Unfortunately not enough resolution to actually SEE the Frequency Response across the FM Band....
LTE Filter is indeed intended for North American TV Band, with only about 1 dB Loss on 700 MHz and about 28 dB Attenuation on 750 MHz with either Gain Selection.
