TRANSMITTER
Audio Source
Freq 500Hz
Amp 4.0V
ADC (Coder)
Bits 3 bit
TEST INTERNAL:
S
Q
FSK Mod
Mark: 40k
Space: 20k
Hop Mixer
×
PN Gen (LO)
Table
Rate
Power Amp
Gain 1.0x
TP1
TP2
TP3
TP4
TP5
TP12
⇣ RF CHANNEL (AIR GAP) ⇣
RECEIVER
RF Amp
Gain 2.0x
De-Hop
×
PN Gen (RX)
Table
Rate
FSK Demod
Freq → Bin
DAC
Bin → Analog
Audio Amp
Gain 1.0x
TP6
TP7
TP8
TP9
TP10
TP11
TP13