Operations Manual

Page 40 RF Technology T50
7.4.10 Carrier and Modulation Attack Time
7 SPECIFICATIONS
7.4.10 Carrier and Modulation Attack Time
Less than 25ms. Certain models have RF envelope attack and decay times controlled in
the range 200
µ
s<
t
r/f
<2ms according to regulatory requirements.
7.4.11 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, 4,0, or 5.0 kHz. A User Specified Maximum deviation can be preset as well.
(Please request this when ordering the unit).
7.4.12 Distortion
Modulation distortion is less than 3% at 1 kHz and 60% of rated system deviation.
7.4.13 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).
7.4.14 600
Ω
ΩΩ
Ω
Line Input Sensitivity
Adjustable from -32 to +12 dBm for rated deviation on two symmetric, independent,
transformer coupled Line inputs.
7.4.15 Test Microphone Input
200
Ω
dynamic, with PTT
7.4.16 External Tone Input
Compatible with R500 tone output
7.4.17 T/R Relay Driver
An open drain MOSFET output is provided to operate an antenna change over relay or
solid state switch. The transistor can sink up to 250mA. A 1W flywheel diode connects
to the 12V rail to prevent damage to the FET from inductive kick from a relay coil.