Operating instructions

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7.4.2 Frequency Range and Channel Spacing
The T50, as a single model, covers the full band, and all channel spacing.
Frequency 25 kHz 20kHz 15kHz 12.5 kHz 10 kHz 7.5 kHz 6.25 kHz
25 - 50 MHz T50 T50 T50 T50 T50 T50 T50
7.4.3 Frequency Synthesizer Step Size
The specified frequency can be any multiple of 1250Hz.
7.4.4 Frequency Stability
±5 ppm over 0 to +60 C, standard
±12 ppm over -30 to +60 C.
7.4.5 Number of Channels
256, numbered 00 - 255
7.4.6 Output power
The T50 needs an external PA50 power amplifier.
The output power is factory set to 100W by default, the reverse power level is set to
fold back the output power when the PA50 sees a load with VSWR of 3:1 or higher (i.e.
when the reverse power is 25% or more of the forward power).
7.4.7
Transmit Duty Cycle
100%
7.4.8 Spurious and Harmonics
Less than 0.25
µW, when connected to a PA50 operating at an output power level of
100W.
7.4.9 Carrier and Modulation Attack Time
Less than 36ms (Rev 3 and Rev 4).
Less than 20ms (Rev 5 or higher).
7.4.10 Modulation
Type - Two point direct FM with optional pre-emphasis
Frequency Response - ±1 dB of the selected characteristic from 300-3000Hz
Maximum Deviation - Maximum deviation set on a per channel basis to 1.5, 2.0, 2.5,
3.0, 3.5, 4.0, 4.5, or 5.0 kHz.
7.4.11 Distortion
Modulation distortion is less than 3% at 1 kHz and 60% of rated system deviation.
7.4.12 Residual Modulation and Noise
The residual modulation and noise in the range 300 - 3000
Hz is typically less than -
50dB with 5kHz maximum deviation (
i.e. a test level of 3kHz).
7.4.13 600Ω Line Input Sensitivity
Adjustable from -32 to +12
dBm for rated deviation on two symmetric, independent,
transformer coupled Line inputs.