DB1065 Datasheet, PDF (11/23 Pages) CML Microcircuits – CTCSS Encoder / Decoder Development Kit

Oscilloscope
J6 RXOUT audio from
DB1065
CTCSS tone
generator
CTCSS tone @
67Hz, 100mvrms
Audio signal
generator
1K
1KHz sine wave @
300mvrms
DB1065, J2 RXIN
Variable
Power
Supply
GND, J13 on
DB1065
1K
0 to +6VDC to J1,
B+ on DB1065
GND, J13 on
DB1065
DB1065 +5 and Gnd
connections
Ground J5, PTL on
DB1065
Figure 3: Testing at different supply voltages
Measuring supply current at different supply voltages in the configuration shown in Figure 3
would result in a typical graph as shown in Figure 4.
20480150.001 MX-COM
1996
Page 11