Telex IP-223 - Manual (Page 30)

Installation and Level Settings
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To adjust the TX monitor, do the following:
1. In the options section of the Per Line Setup window, select the TX Monitor.
NOTE: If this feature is not necessary, or the line is in 2-wire mode, the TX Monitor field in the Options section on
the Per Line Setup window should be cleared.
2. Verify the RX alignment is completed first.
To perform a standard alignment for a 4-wire system, do the following:
1. Transmit a 0dBm test tone on the TX audio pairs pins 13 and 25.
2. Measure the RX level on test point TP13 for line 1 or TP1 for line 2.
3. Adjust potentiometer R390 for line 1 or potentiometer R391 for line 2 until 0dBm is measured between the test
point and GND. (0dBM = 2VPP = .707VRMS).
NOTE: Do not adjust the RX potentiometers.
4. Use the RX alignment tool (VU meter) accessed through the LCD display (press and hold the line button and then
momentarily press the IC button 3 times) to verify the dBm level.
CTCSS Level
The CTCSS level is measured by connecting an oscilloscope or RMS meter to ground and Radio 1 CTCSS test point (TP7) or
Radio 2 CTCSS test point (TP10). With the radio connected to the CTCSS output, have the remote console open to receive
audio so CTCSS is present. Adjust the Radio 1 CTCSS potentiometer (R50) or Radio 2 CTCSS potentiometer (R53) until the
desired level is achieved.
Frequency Decoding
The IP-223 is factory tuned to the frequencies shown below. The detection frequencies cannot be changed as they are coded
into the software. However, any actual function or output can be made to work with any existing programmed frequency.
Please consult the factory for special requirements for frequency selections.
Guard tone/PTT Tone: 2175 Hz
MON Function Tone: 2050 Hz
Frequency Select Function Tones (where used)
F1: 1950 Hz F5: 1550 Hz F9: 1150 Hz F13: 750 Hz
F2: 1850 Hz F6: 1450 Hz F10: 1050 Hz F14: 650 Hz
F3: 1750 Hz F7: 1350 Hz F11: 950 Hz F15: 550 Hz
F4: 1650 Hz F8: 1250 Hz F12: 850 Hz F16: 450 Hz