Vega DSP-223, Technical Manual

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2 Vega DSP-223
2 Installation
2.1 DSP-223 Power Supply
The DSP-223 requires a 12 to
16 volt DC, 500 mA, of clean
power. Two connectors are
provided to connect the unit to
power. The first is a 2.5mm
plug receptacle on the rear left
of the unit. The positive
terminal is the center
conductor. The second power
connection option is the DB25
connector. Figure 1 shows the
pin out of this connector.
Connect an external 12 to 16
volt DC supply with the
positive connected to Pin 20
and the Ground connected to
Pin 7.
2.2 DSP-223 to Console Line Connection
The line connector is the right most connector on the rear of the DSP-223. Connect the two-wire leased
line to pins 4 and 5 of the RJ-45 modular
connector, making sure that J20 and J21 are
set to position A. Four-wire operation
requires J20 and J21 be set to position B and
connect the outgoing line to pins 4 and 5, and
the receive pins to 3 and 6.
Note: Pins 4&5 of the Line connector are
the RX audio from the radio. They are
transmitted back down the line to the
console. Pins 3&6 of the Line connector
are inputs from the console and the audio
present on this pair will be sent to the radio.
There are several jumper selections that must be made for the line connection. Set the jumpers
according to your connection requirements.
2 Wire / 4 Wire Selection: J20 J21 RX Termination: J19
2 Wire A A 600 Ohms A
4 Wire B B 10k Ohms B
The RX termination should be placed in position “A” on J19 for a single unit at the end of a line. If
multiple units are connected in parallel, only one unit should have the RX Termination jumper in the “A”
position.
Set J19 to “B” position for 2-wire operation.
2.3 DSP-223 to Radio Connection
2.3.1 TX Audio Connection
The DSP-223 has a number of options when connecting it to the radio. Set the jumpers according to the
method outlined in your radio’s owner manual.
DB25 Rear Panel
Connector
13 12 11 10 9 8 7 6 5 4 3 2 1
25 24 23 22 21 20 19 18 17 16 15 14
1-PTT NC 20-+POWER
14-PTT NO 8-DIG 0
2-PTT COM 21-DIG 1
15-MON NC 9-DIG 2
3-MON NO 22-DIG 3
16-MON COM 10-DIG 4
4-F1 NC 23-DIG 5
17-F1 NO 11-CTCSS
5-F1 COM 24-RX+
18-F2 NC 12-RX-
6-F2 NO 25-TX+
19-F2 COM 13-TX-
7-GROUND
Figure 1 DB25 Rear Connector Pin-out
1 2 3 4 5 6 7 8 1)
2) Voter Input
3) RX +
4) TX +/ (RX + 2W)
5) TX -/ (RX - 2W)
6) RX -
7)
8) Ground
Connector View
Figure 2 Line Connector Pin-out