Table 4-1 Description On Option Board Interface - Hytera MD78X Service Manual

Baseband Section
Pin
Signal
No.
16 AF OB TO MB
18 AF MB TO OB
19 DGND
20 3V6 or 5V
Function
AF
AF
DGND
Power

Table 4-1 Description on Option Board Interface

I/O
Relative
Voltage
to
(VDD=3.3V)
Option
Board
80mv
output from
I
option board to the
main board)
80mv
output from
O
main board to the
option board)
/ /
Power
O
5.0V
14
Service Manual
Remarks
(standard
the
MAX: 700mV
(standard
the
MAX: 700mV
/
supply:
/