Operations Manual

Page 12 RF Technology T50
4 CHANNEL PROGRAMMING AND OPTION SELECTION
Field1: Transmit Frequency (in MHz) if PTT-in is asserted. This is 25.0 MHz in the
example.
Field2: Transmit Frequency (in MHz) if the exciter is keyed up by anything but PTT-in
being asserted. This is 35.0 MHz in the example.
Field3: CTCSS Tone (in Hz) if PTT-in is asserted. This is 100Hz in the example.
Field4: CTCSS Tone (in Hz) if the exciter is keyed up by anything but PTT-in being
asserted. This is 120Hz in the example.
Fields 5,6,7: These define the start-up delay (in hundredths of a second), the transmit
tail (in seconds), and the no tone period (in tenths of a second) if the exciter
keys up from PTT-in being asserted.
Fields 8,9,10: These define the start-up delay (in hundredths of a second), the transmit
tail (in seconds), and the no tone period (in tenths of a second), if the exciter
keys up from anything other than PTT-in being asserted.
Field 11: Selects the line parameter if PTT-in being asserted caused the exciter to key
up. In the example it has disabled the 20dB gain pad, and enabled pre-
emphasis on Line 2 (Line 1 is disabled).
Field 12: Selects the line parameter if anything other than PTT-in being asserted caused
the exciter to key up. In the example it has disabled the 20dB gain pad, and it
would enable pre-emphasis on Line 1 and Line2 (i.e. audio on each input is
mixed).
Field 13: Selects the Tone deviation and the Maximum Line deviation if the exciter
keys up from PTT-in being asserted In the example, it has selected the default
maximum line deviation (5kHz), and the default tone deviation of 750Hz. (See
Tables 7 and 8)
Field 14: Selects the Tone deviation and the Maximum Line deviation if the exciter
keys up from anything other than PTT-in being asserted. In the example, it
has selected a maximum deviation of 2.5kHz, and a maximum tone deviation
of 375Hz. (See Tables 7 and 8)
Least Significant BCD digit of Fields 13 or 14 Maximum Deviation
0 5.0kHz
1 4.0kHz
2 3.0kHz
3 2.5kHz
4 2.0kHz
5 1.5kHz
6 User Specified(default: 4.5kHz)
Table 7: Maximum Deviations