Syn-Tech III P25 Portable Radio
OPERATION MANUAL
680-090-2041
Version 5.0
http://www.midlandradio.com
62
8.2 Transmitter Specifications
TRANSMITTER SPECIFICATIONS
VHF UHF
Frequency Range 136-174 MHz 380-470 MHz
Frequency Separation Full Bandsplit Full Bandsplit
Channel Spacing 12.5 / 20 / 25 / 30 kHz 12.5 / 20 / 25 / 30 kHz
Frequency Step 2.5 / 3.125 kHz 2.5 / 3.125 kHz
Rated RF Output Power * 1-5 W 1-5 W
Frequency Stability *
(-30°C / +60°C; 25°C ref)
± 2.5 ppm ± 1.5 ppm
Modulation Limiting *
Analog 25 kHz channel
Analog 12.5 kHz channel
± 5.0 kHz
± 2.5 kHz
± 5.0 kHz
± 2.5 kHz
C4FM Modulation Fidelity **
RMS Error
C4FM Deviation
≤ 2 %
1800 ±100 Hz
≤ 2 %
1800 ±100 Hz
Spurious Emissions *
(Conducted and Radiated)
≤ -70 dBc ≤ -70 dBc
Audio Frequency Response *
(6 dB/Octave Pre-emphasis
from 300 to 3000 Hz)
+1, -3 dB +1, -3 dB
Hum and Noise Ratio
Analog 25 kHz channel *
Analog 12.5 kHz channel *
≥ 52 dB
≥ 46 dB
≥ 46 dB
≥ 40 dB
Audio Distortion * ≤ 1 % ≤ 1 %
* Measured in the analog mode per EIA-603 under nominal conditions.
** Measured in the digital mode per TIA-102.CAAA under nominal conditions.
