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VX-4000 VHF Low-band Service Manual
Similarly, if you assign “CH SW0,” “CH SW1,”
and “CH SW2” to the Universal Input Port, you
can recall Channels 1~7 as shown below:
The Memory Channel is determined via the CE35
Programmer. (View à Common View à DSUB-
25pin connector à Channel switch Table).
Pin 7: E [GND]
Ground for all logic levels and power supply re-
turn.
Pin 8: AO2 [Universal Output Port]
Open collector output. Output voltage 0 ~ 5 V,
Max. sink current 30 mA.
The possible programming features (use CE35)
are illustrated below.
A KEY/B KEY/C KEY/D KEY/E KEY/HA/Invert
Refer to the “Pins 20, 21, & 22” section for details.
Pin 9: TXD2 [Digital Output for Alignment software]
Connect to the RS232C cable (requires FIF-8 and
CT-88)
Pin 10: RXD2 [Digital Input for Alignment software]
Connect to the RS232C cable (requires FIF-8 and
CT-88)
Pin 11: TXS [EXT PTT]
Shorting this port to ground causes the trans-
ceiver to be placed in the Transmit mode, while
opening the connection to this port returns the
transceiver to the Receive mode.
Pin 12: MCM [MIC Mute]
MIC mute on: Level High (5V)
MIC mute off: Open
LOGIC level (+5V / 0V) output.
When the PTT/EXT PTT switch is pressed, this
pin switches to “open.”
Pin 13: MD/DI [Digital Input for DATA Communications]
m TX Hi-speed Data Input Type (jumper JP2006).
Input level 800 mV/600 Ohms, Max.input 1.2V
m Tx Low-speed Data input Type (Jumper
JP2007). Input level 40 mV/600-Ohms
If the Jumper setting is “Low-speed Data” (JP2007
jumpered), this port is usable in the AUDIO
(300~3000 Hz) range.
If the jumper setting is “HI-speed Data” (JP2006
jumpered), this port is usable for 9600 bps DATA
communications, because the filter and limiter are
not engaged in the Audio line.
Pin 14: SB [13.8 V/5 V DC Output]
m Switched 13.8V output for supplying power
to an accessory (jumper JP2009).
m Switched and regulated DC 5.0V output for
supplying power to an accessory (jumper
JP2008).
Maximum output current is 200 mA
If you need to recall all memory channels (15 CH)
from the External Controller via the Uni-versal
Input Port, you should assign the “All Channel
Recall” Command (CH SW 0 ~ CH SW 3) to the
Universal Input Port.
In this case:
Channel CH SW0 CH SW1 CH SW2
1 1 0 0
2 0 1 0
3 1 1 0
4 0 0 1
5 1 0 1
6 0 1 1
7 1 1 1
Channel CH SW0 CH SW1 CH SW2 CH SW3
1 1 0 0 0
2 0 1 0 0
3 1 1 0 0
4 0 0 1 0
5 1 0 1 0
6 0 1 1 0
7 1 1 1 0
8 0 0 0 1
9 1 0 0 1
10 0 1 0 1
11 1 1 0 1
12 0 0 1 1
13 1 0 1 1
14 0 1 1 1
15 1 1 1 1
Sample Circuit
PINS 2, 3, 4, 6
PIN 5 (Pull Up)
47k
W
DSUB 25-Pin
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