Vega 223C User Manual
Instruction Manual
223C Series Tone-Remote Adapters
098-0347 Rev. B
2 223C Series
Table of Contents
General............................................................................................................................................................................2
Operation......................................................................................................................................................................2-3
Installation .......................................................................................................................................................................3
Tuning..............................................................................................................................................................................3
Level Adjustments........................................................................................................................................................3-4
Theory of Operation.....................................................................................................................................................4-6
Warranty and Claims.......................................................................................................................................................6
Specifications ..................................................................................................................................................................6
Parts List......................................................................................................................................................................6-8
General
The Vega 223C Series tone-remote adapters provide a reliable means of remotely controlling two-wayradio base stations. The adapters can be used in conjunction with Vega Models C-510C/C-511/C-512 (twofrequency), Model C-514B (four-frequency), Model C516 (six-line/two-frequency), Model C-1614 (sixline/four-requency, and Model C-5110/C-5111/C-5112
(ten-line/four-frequency) tone-remote control consoles,
or other manufacturers' (such as Motorola and GE) remote consoles which use the industry-standard sequential tone keying format.
The basic PC board in each adapter is the Model
223C, which provides PTT and monitor functions only,
on one operating frequency. A Model 224B expansion
board is added for every two frequencies. The first
224B plugs into an edge of the 223C, the second 224B
into the first 224B, and so on, in a chain. The 223C Series PC boards and adapters are available in the following models:
MODEL DESCRIPTION
223C/PCB PC board (no case); PTT/monitor only;
two-wire half-duplex) or four-wire (half-
duplex or full-duplex)
224B/PCB Two-frequency expansion PC board
RC-223C Encased single-frequency/PTT/monitor
transmit/receive adapter; includes com-
pact case (1.75 in H, 9.25 in W, 7.25
in D) and Model 223C PTT/monitor PCB
RP-223C Same as RC-223C, but in rack-mounting
case (1.718 in H, 19 in W, 6.5 in D)
RC-223C-2 Encased two-frequency/PTT/monitor
adapter; includes compact case, Model
223C PTT/monitor PCB, and Model 224B
two-frequency expansion PCB
RP-223C-2 Same as RC-223C-2, but in rack-
mounting case
RP-223C-4 Encased four-frequency/PTT/monitor
adapter; includes rack-mounting case,
Model 223C PTT/monitor PCB, and two
Model 224B two-frequency expansion
PCBs
RP-223C-6 Encased six-frequency/PTT/monitor
adapter; includes rack-mounting case,
Model 223C PTT/monitor PCB, and
three Model 224B two-frequency expan
sion PCBs
RP-223C-8 Encased eight-frequency/PTT/monitor
adapter; includes rack-mounting case,
Model 223C PTT/monitor PCB, and four
Model 224B two-frequency expansion
PCBs
Options
LPO-1 Lightning and transient protection on-line
interface
TO-23 Transformer isolation on transceiver
interface
Operation
The 223C Series adapters are interconnected to the
distant remote control console(s) by any voice-grade
transmission medium such as a microwave link, a
leased telephone line, or a twisted-pair 600-ohm line.
All 223C Series adapters are capable of decoding
the PTT (push-to-talk/transmitter-on) tone sequence
and the voice-plus-tone signals during transmission.
The tone portion of the voice-plus-tone signal is removed from the transmitted voice. All models are prepared for jumper-plug conversion from two-wire-line
operation to four-wire-line operation. In the four-wire
mode, the panels also may be jumper-plug converted
to full-duplex operation.
The “monitor” function provided in all 223C Series
adapters decodes the valid tone sequence and provides relay-contact output to turn off the subaudibletone-decoder circuit in the radio receiver, allowing the
console operator to monitor the channel for other users
before he transmits (required by FCC regulations on
stations equipped with continuous-tone-coded-squelch
signaling). On single-user stations not equipped with
subaudible signaling, or where the CTCSS decoders
are disabled, the monitor function relay output may be
used for any purpose such as interrogation of a
status-reporting system at the station site. The monitor
function may be programmed to operate in one of three
modes:
Tone-Remote Station Adapters 3
(1)
Timed mode
monitor function for a timed period (adjustable up to at
least 9 seconds) or until a PTT command is decoded.
Latched mode,
(2)
command until reset by a PTT command.
Refreshable timed mode,
(3)
monitor function for a timed period upon any tone-burst
command. Any command received during the timed period refreshes the timer for another full timer period.
The frequency-select function is provided in all models using the 224B/PCB expansion PC board(s). The
number of commandable frequencies varies from two
to eight, depending upon the model chosen. As
shipped, one of the frequency-select relays is always
latched on, and, upon decoding a frequency-select
command, the latched relay is reset and the relay associated with the command is latched on (1-of-N
mode).
The frequency-select function may also be used for
other purposes. For example, a pair of “frequencyselect” outputs may be used to activate and deactivate
a status or alarm system at the panel site, or may be
used for scan-on/scan-off purposes.
Frequency-select relays may be programmed (in
pairs only) by solder bridges to provide two or more independently interlocked groups. Any pair of frequencyselect relays may also be programmed for momentary
operation.
Installation
Connect an external 10 to 16 volt semiregulated DC
power supply to the terminal board, with negative to
TB1-17 and positive to TB1-18.
Connect the two-wire leased line to TB1-5 and
TB1-6. For four-wire operation, move JP6 to B, connect
the outgoing line to TB1-5 and TB1-6, and connect the
incoming line to TB1-7 and TB1-8. Also move JP4 to B
if full-duplex operation is desired.
Connect TB1-3 to the transmitter mic audio input,
and TB1-4 to the transmitter mic audio return. If the
TO-23 radio-interface isolation transformer option is not
installed, set JP12 and JP13 both to the “A” position. If
the TO-23 option is installed, set JP10 and JP11 both
to the “B” position.
If the mic input is a high-impedance type, shielded
cable is recommended. If the radio has a high-level mic
input, move JP7 to the “B” position.
Connect the radio receiver audio output to TB1-1
and TB1-2. This must be an audio source after the
squelch circuit, to prevent sending continuous noise to
the remote console(s). If the radio receiver audio output
is single-ended and the TO-23 option is not installed,
be sure that the “low” or “grounded” side of the radio
receiver audio output is connected to TB1-2. If the
TO-23 option is not installed, set jumpers JP12 and
JP13 both to the “A” position; if the TO-23 option is installed, set jumpers JP12 and JP13 both to the “B” position.
If a high-impedance point in the receiver is used,
shielded cable is recommended. If the speaker output
is used, move JP5 to B. Note that when the speaker
output is used, the radio volume control will affect the
audio output level at TB1-1.
(as shipped), which provides the
which latches upon a monitor
which provides the
Connect the radio PTT circuit to the PTT relay con-
tact terminals of the panel. Refer to the schematic.
Connect the radio “monitor” circuit to the MON relay
contact terminals. Refer to the schematic.
With all models except 223C/PCB, RC-223C, and
RP-223C, connect the radio-frequency control circuits
to the function-control relay output terminals on the
small (224B/PCB) PC board(s). Usually the common of
each relay contact switch is grounded and the normally
open contact connects to the radio frequency-control
terminals. Refer to the schematic.
A few radios (such as some GE models) have separate transmitter and receiver frequency controls. Use
the above connections for transmitter frequency controls and connect the receiver frequency controls to the
second set of relay contacts available at solder-pad terminals. Refer to the schematic.
Relay/LED defeats and active-low open-collector
logic outputs have been provided for special installations. Refer to the schematics.
Transient protection has been provided near all
audio inputs and outputs. This is adequate for transients up to at least 100 volts, but external transient
protection such as gas-discharge or MOV devices
should be installed to provide some protection from
very high voltage transients such as from lightning.
For additional protection, provisions have been made
on the 223C PC board for installation of the LPO-1 option consisting of Vega #146-0005 gas-discharge-tube
protectors or MOV devices such as GE #V100ZA15
(one gas tube or three MOVs per line). An earth-ground
terminal is also provided.
Vega will not replace units under warranty that have
obvious high-voltage damage such as vaporized PCboard traces or melted components.
The RC/RP-223C line transformers are not designed
to operate on lines carrying direct current. If a DC voltage is on the line, isolate with external capacitors. If the
line termination must conduct direct current, install a
600:600-ohm transformer designed for the current involved.
Tuning
All models have been factory-tuned to the following
frequencies, and for normal applications require no tuning:
Guard tone/PTT Tone: 2175 Hz
MON Function Tone: 2050 Hz
Frequency Select Function Tones (where used)
F1: 1950 Hz F5: 1550 Hz
F2: 1850 Hz F6: 1450 Hz
F3: 1750 Hz F7: 1350 Hz
F4: 1650 Hz F8: 1250 Hz
For special applications using other than standard
frequencies, special order from the factory.
Level Adjustments
Level adjustment normally are required only at the
time of installation or due to base-station changes.
Loading...