Vega DSP-223, Техническое руководство

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Tone Remote 9
The Repeater Mode introduces a 400ms audio delay in the transmit path and removes the Hold tone
notch filter. If the unit detects a valid Guard-Function sequence, it will key up the DSP-223 immediately.
With the 400ms delay, the Guard Function is repeated out the radio interface. If the DSP-223 detects the
Hold tone, it will remain keyed up allowing one radio to serve as the link to another DSP-223.
PTT Tone Only causes the DSP-223 to not respond to a function tone and key up on detection of a valid
Hold tone. This will eliminate all options that are function tone based, but allows the DSP-223 to be used
in a most basic manner. This mode is useful for alignment when only a single tone generator is available
and not a tone remote console
Revert to R1 energizes relay R1 at the end of a PTT sequence. It will either latch it on or energize it for
the time programmed for R1 in the function tone table. For example, if F1 uses R1 and has a timer
setting of zero, the
Revert to R1 option will latch the R1 relay at the end of the PTT sequence. If F1 has
R1 selected and has a timer value set for R1, then at the end of the PTT, R1 will latch on for the timer
value and then turn off. Note that all function tones that utilize R1 must have the same timer value
setting. The setup software enforces this by changing all values for R1 when one is changed.
The operation of auxiliary relays R1 and R2 as a function of PTT is selectable. When selected, R1 or R2
will close at the same time as the PTT relay. Connection to the relay contacts may be made through the
DB25 connector on the rear panel. No auxiliary relay operation may also be selected.
4.2.2.4 Monitor Relay Options
The MONITOR function provided in the DSP-223 decodes the valid tone sequence and provides a relay-
contact closure to turn off the sub-audible-tone-decoder circuit in the radio receiver, allowing the console
operator to monitor the channel for other users before transmitting (required by FCC regulations on
stations equipped with continuous-tone-coded-squelch signaling). Connection to the monitor relay
contacts is provided through the DB25 connector on the rear panel. On single-user stations not equipped
with sub-audible 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.
The DSP-223 provides three options for the MONITOR relay action. Reset on PTT resets the monitor
relay when PTT goes active. Always Except PTT latches the MON relay at all times except when PTT is
active, whether the monitor function tone is received or not. Momentary sets the monitor relay for a
programmed period of time.
4.2.2.5 EE/Error Beeps (Rev 2.0 or higher)
The DSP223 will display “EE” on the front panel LED display and transmit error beeps to the dispatch
console when an un-decodable signal is received on the line RX. To defeat the error beep feature
uncheck the checkbox.
4.2.2.6 Line DTMF Decoder
When checked, the DSP-223 will not respond to DTMF tones sent by the console.
4.2.2.7 Audio Loop Back
When checked, the DSP-223 will route all audio received at the Line RX terminals back to the Line TX
terminals. In addition all functions continue to work within the DSP-223. This allows for a number of
consoles to be bridged together and still monitor traffic of consoles on separate bridge segments. This
function is typically used in 4-wire systems only.