Platinum Information
ATV FM Receiver Sensitivity Table
CW
RF Input Level
13cm COP
Receiver
13cm Receiver
(2340 MHZ)
23cm Receiver (1252 MHZ)
Unmodified with ground
on pin 13
with 10K
on pin 14
with 8.2K
on pin 14
Notes dBm Noise
Volts
Signal
Volts
Noise
Volts
Signal
Volts
Noise
Volts
Signal
Volts
Noise
Volts
Signal
Volts
Noise
Volts
Signal
Volts
Noise
Volts
  -130 .016 0.813 .180 1.005 .190 1.099 .150 1.290 .130 1.436 .092
-120 .016 0.814 .180 1.000 .200 1.096 .155 1.290 .120 1.433 .090
-115 .016 0.817 .175 1.009 .190 1.102 .143 1.293 .115 1.434 .095
-110 .020 0.824 .160 1.017 .160 1.111 .128 1.296 .110 1.436 .098
-105 .040 0.849 .110 1.042 .110 1.138 .095 1.325 .080 1.457 .075
0.1V
noise
level
-103           1.459 .100
-102.5   .860 .100        
-101.3         1.330 .100  
-100 .250 0.890 .085 1.081 .075 1.174 .069 1.360 .061 1.499 .052
-99       1.159 .100    
-98     1.075 .100      
-95 .250 0.967 .061 1.160 .460 1.256 .044 1.442 .040 1.577 .036
-90 .110 1.070 .040 1.256 .030 1.356 .029 1.545 .027 1.684 .028
-89 .100          
  -85 .050 1.214 .024 1.410 .017 1.515 .017 1.707 .016 1.845 .014
-80 .026 1.376 .014 1.570 .015 1.680 .015 1.871 .010 2.013 .0098
P5 -76.5           2.171 .0070
-76         2.055 .0070  
-75 .017 1.555 .0079 1.774 .0070 1.881 .0070 2.073 .0066 3.440 .0062
-74   1.600 .0070        
  -70 .012 1.744 .0051 1.974 .0049 2.080 .0049 3.600 .0047 3.740 .0050
-65 .0094 1.939 .0039 3.110 .0039 3.370 .0039 3.770 .0041 3.810 .0044
P5 -62.5 .0070          
  -60 .0056 3.150 .0029 3.720 .0036 3.820 .0036 3.830 .0039 3.860 .0042
-55 .0038 3.580 .0027 3.800 .0034 3.900 .0034 3.860 .0038 3.900 .0042
-50 .0026 3.680 .0026 3.850 .0034 3.950 .0034 3.920 .0037 4.160 .0040
AGC
saturation
-48           4.300 .0040
-45 .0022 3.730 .0025 3.890 .0034 3.990 .0034 4.300 .0037  
-40 .0019 3.990 .0025 4.110 .0034 4.300 .0034    
-37 .0017   4.300 .0034    
-35 .0016 4.140 .0025    
-31 .0016 4.270 .0025

Signal Volts = Tuner "S" Meter Signal Strength Output Voltage.
Noise Volts = RMS value of noise at the receiver demodulated video output jack.

P5 is un-modulated CW level required to produce a Noise Free Black Screen.
Noise Free was found to be a noise voltage of .007 volt or less.

AGC is fully saturated when signal voltage reaches 4.30 volts and there is no further increase with signal strength.