Vertex Standard EVX-5300, Руководство по обслуживанию

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EVX-5300/-5400 UHF Service Manual 4
DSUB 15-pin Accessory Connector
Pin 1: AF IN (Analog Input)
External Microphone Input. Nominal input level is 4 mV
(or –47 dBm; programmed via the CE142 programmer) at
600-ohm.
Pin 2: AF OUT (Analog Output)
Low-level receiver output. Peak signal level is –10 dBm
at 600-ohm.
Pin 3: AF GND
Ground for all logic levels and power supply return.
Pin 4: DC OUT (13.6 V DC Output)
Switched 13.6V output for supplying power to an acces-
sory.
Maximum output current is 1 A.
Pin 5: RSSI (Analog Output)
A DC voltage proportional to the strength of the signal
currently being received (Receiver Signal Strength Indica-
tor) is provided on this pin. This low impedance output is
generated by the receiver IF sub-system and buffered by
an internal op-amp. Typical output voltages are 0.1 V (@
No Signal Input) through 2.0 V (@50 dBµ Signal Input).
Pin 6: EXT PTT
Shorting this port to ground causes the transceiver to be
placed in the Transmit mode, while opening the connec-
tion to this port returns the transceiver to the Receive
mode. Opening voltage is 5 V, closed current approx. 5
mA.
Pin 7: TRX
This port is intended for controlling an external TX/RX
switching circuit. When the transceiver is placed in the
Receiver mode, this port is 5 V. When the transceiver is
placed in the Transmit mode, this port reduce to 0 V.
This port is open drain output which can sink approx. 50
mA when active.
Pin 8: IGN (Ignition Sense feature)
The EVX-5300/-5400 may be automatically be switched
to the STND-BY mode when the vehicle’s ignition key is
turned on. Maximum current is 20 mA.
Pin 9-12: ACC1 - ACC4 (Accessory Port)
These port features can be programmed via the CE142
programmer. Each port is open drain output which can
sink approx. 50 mA when active. Max. output 16 V.
When the input is selected, it becomes active between 2 V
and 16 V.
Pin 13: ACC5 (Accessory Port)
The port 5 is available to set only for Output function, and
active logic is opposite side against the Port 1 ~ 4.
Max. output 5 V, closed current approx. 1 mA (CMOS
output).
Pin 14: ACC6 (Accessory Port)
The port 6 is available to set only for Input function, and
active logic is opposite side against the Port 1 ~ 4.
Max. input 5 V (CMOS input).
Pin 15: GND
Chassis ground