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TN855 CI-DSP-223 Telex DSP-223 Tone-Remote Adapter
The Telex DSP-223 tone-remote adapter provides a reliable means of remotely controlling Zetron base stations
and repeaters. The adapters can be used in conjunction with tone-remote control consoles which use the industry-
standard sequential tone keying format. The DSP-223 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 DSP-223 adapters are capable of decoding the PTT 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 four-wire-line operation to two-wire-line operation. In the
four-wire mode, the panels are full duplex capable.
The Telex DSP-223 tone-remote adapter provides the following features:
• PTT Relay and Monitor Relay
• 99 digit front panel display
• PTT, Monitor and Power LED indicators
• F1 and F2 Relays (programmable to any function tone)
• Digital outputs for channel selection of the Zetron Tx and Rx modules (programmable to any function tone)
• CTCSS encode generation (64 frequencies available)
• Hardware and software gain controls
• Local handset port for monitoring activity through the unit and transmission back to the base or to the radio
• Front panel test points and level set pots
• RS-232C port on front panel for software confi guration via Windows application
• Ability to pass through to a second tone adapter
• Single or Dual function tone recognition (16 or 100 function tones)
• Morse code encoder for Automatic station identifi cation
• Voter / Ring Down Tone Generation
All models have been factory tuned to the following frequencies:
Guard Tone / PTT Tone: 2175 Hz
Monitor Function Tone: 2050 Hz
Frequency Select Function Tones (where used)
F1: 1950 Hz
F4: 1650 Hz
F2: 1850 Hz
F5: 1550 Hz
F3: 1750 Hz
F6: 1450 Hz
TECHNICAL NOTE:
TN855, REV 13-0-0, © Jul 2024
CANADA/US
+1 250 382 8268
F7: 1350 Hz
F8: 1250 Hz
F9: 1150 Hz
| TOLL FREE
+1 800 664 4066
TECHNICAL NOTES
MT-4/5 Radio Systems
F10: 1050 Hz
F13: 750 Hz
F11: 950 Hz
F14: 650 Hz
F12: 850 Hz
F15: 550 Hz
F16: 450 Hz
ZETRON.COM
LMRSALES@ZETRON.COM
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Related Manuals for ZETRON TN855
Summary of Contents for ZETRON TN855
- Page 1 • PTT, Monitor and Power LED indicators • F1 and F2 Relays (programmable to any function tone) • Digital outputs for channel selection of the Zetron Tx and Rx modules (programmable to any function tone) • CTCSS encode generation (64 frequencies available) •...
- Page 2 TN855 CI-DSP-223 Telex DSP-223 Tone-Remote Adapter Wiring Diagram for MT-4 SR-39-1 Subrack: On the MT-4 subrack, the optional A-PNL-AUX96-3 auxiliary connector can be used to connect the Telex DSP-223 to a Zetron Base Station, as shown in Figure 1. ZETRON MT-4 SUBRACK A-PNL-AUX96-3 AUX CONNECTOR...
- Page 3 TN855 CI-DSP-223 Telex DSP-223 Tone-Remote Adapter Wiring Diagram for MT-5 MT5-SR-00-01 Subrack: On the MT-5 subrack, the Auxiliary Board terminal Blocks can be used to connect the Telex DSP-223 to a Zetron Base Station, as shown in Figure 2. ZETRON MT-5 SUBRACK...
- Page 4 TECHNICAL NOTES MT-4/5 Radio Systems TN855 CI-DSP-223 Telex DSP-223 Tone-Remote Adapter While the wiring can be connected to the auxiliary terminals on the rear of the MT-4 and MT-5 subracks, both subracks also include a female DB25 connector on the back of the subrack, which can also be used for connecting...
- Page 5 TECHNICAL NOTES MT-4/5 Radio Systems TN855 CI-DSP-223 Telex DSP-223 Tone-Remote Adapter DB25 Connectors for MT-5 MT5-SR-00-01 Subrack: The MT-5 subrack includes two DB25 connectors, J7 (A Side Device) and J8 (B Side Device). These are female DB25 connectors that can be used for basic base connections to TXA/RXA or TXB/RXB.
- Page 6 The software shown in Figure 5 is version 2.8 and is programmed for channels 1 through 9 with CTCSS tones of 100.0 Hz on channel 1, 203.5 Hz on channel 2 and no CTCSS on channels 3 through 9. Zetron radio systems do not require the “Set Gains”...
- Page 7 Receiver and Transmitter Audio/Deviation Level Tuning Step 2 - Disconnect the Telex tone remote from the Zetron radio system. Step 3 - Apply a 1.0 KHz tone @ 0 dBm (775 mV) to the Tx Bal I/P1 and Tx Bal I/P 2 balanced audio input.
- Page 8 R13 (RXA to Aux Out 1) or R56 (RXB to Aux Out 2) for an audio level of 0 dBm (775 mV @ 600 ohms) across Aux O/P 1 and Aux O/P 2 on the Zetron radio system. On the front panel of the Telex, monitor the receive radio level (AC Voltmeter across RADIO RX and GROUND) and adjust the RADIO RX pot for 0 dBm (775 mV).
- Page 9 TECHNICAL NOTES MT-4/5 Radio Systems TN855 CI-DSP-223 Telex DSP-223 Tone-Remote Adapter Schematic for DB25 Connector (J10) on MT-4 SR-39-1 Subrack Figure 7: MT-4 Subrack DB25 Connector Schematic Diagram TECHNICAL NOTE: ZETRON.COM TN855, REV 13-0-0, © Jul 2024 LMRSALES@ZETRON.COM CANADA/US | TOLL FREE...
- Page 10 TECHNICAL NOTES MT-4/5 Radio Systems TN855 CI-DSP-223 Telex DSP-223 Tone-Remote Adapter Schematic for DB25 Connectors (J7 & J8) on MT-5 MT5-SR-00-01 Subrack Figure 8: MT-5 Subrack DB25 Connectors Schematic Diagram TECHNICAL NOTE: ZETRON.COM TN855, REV 13-0-0, © Jul 2024 LMRSALES@ZETRON.COM...