Transmitter Specifications

Courtesy of Midwest Spectrum Management Alliance


29mhz
TX center frequency tolerance: <.or. ="+/-150khz"
CW/Digital Voice ID Deviation: +/-2.5khz
CTCSS Deviation: +/-500hz
Voice Deviation Only (No CTCSS): +/-3.0khz (see notes)
Voice + CTCSS Deviation Combined: +/-2.5khz and +/-500hz = +/-3.0khz
Total Maximum NBFM TX Deviation: +/-3.0khz


50mhz - 144mhz - 222mhz - 440mhz - 902mhz - 1240mhz
TX Center Frequency Tolerance: 50mhz: <.or. ="+/-" 250hz 144 & 222mhz: < .or.="+/-750hz" 440mhz: < .or.="+/-900hz" 902 & 1240mhz: < .or.="+/-" 1.25khz
CW/Digital Voice ID Deviation: +/-3.0khz
CTCSS Deviation: +/-500hz
Voice Deviation Only (NO CTCSS): +/-4.0khz (see notes)
Voice + CTCSS Deviation Combined: +/-3.5khz And +/-500hz = +/-4.0khz
DTMF Deviation: +/-3.0khz
Total Maximum NBFM TX Deviation: +/-4.0khz


Transmitter Adjustment Procedures And Notes:
1. Adjust transmitter frequency to suggested tolerance (or better if possible).
2. If your transmitter will NEVER be used to transmit CTCSS tones, inject a 1.0khz audio tone into the microphone audio path (mic disconnected, TX on) at a level that will drive the audio limiter to 'limiting' (usually close to 1-volt P-P, and then adjust the TX peak deviation to +/- 4.0khz.
3. If your transmitter will be used to transmit CTCSS tones, use the following procedures, making sure that no CTCSS tone is being transmitted, inject a 1.0khz audio tone into the microphone audio path (mic disconnected, TX on) at a level that will drive the audio limiter to 'limiting', and then adjust the TX peak deviation to +/-3.5khz.
4. Assuming that the DTMF generator 'twist' is correct, key the TX, push the 'D' key, and adjust the audio level to +/- 3.0khz deviation. (If only a 12-digit DTMF generator is applicable, use the '#' key instead).
5. If applicable, key TX, enable CW or digital voice ID audio, and adjust the audio level to +/- 3.0khz deviation.
6. With all other sources of audio input disconnected, key the TX and adjust the CTCSS encoder to +/- 500hz deviation.


Co-Channel Spacing
For 29mhz, 52mhz, 144mhz, 222mhz: 75-mile minimum spacing between relay-stations.
For 440mhz, 60-mile minimum spacing between relay-stations.
For 902mhz & higher, 50-mile minimum spacing betweenmrelay-stations.


Adjacent Channel Spacing
A 50-mile adjacent-channel minimum will be adhered to on 15Khz spacing for the purposes of frequency coordination.
A 35-mile adjacent-channel minimum will be adhered to on 20 or 25Khz spacing for the purpose of frequency coordination.


Antenna Height Above Ground & Transmitter Effective Radiated Power
0 - 50 feet (AGL): 400 watts ERP (max)
51 - 150 feet (AGL): 350 watts ERP (max)
151 - 250 feet (AGL): 300 watts ERP (max)
251 - 350 feet (AGL): 250 watts ERP (max)
351 - 450 feet (AGL): 150 watts ERP (max)
Over 450 feet (AGL): 100 watts ERP (max)


NOTES:
1. CTCSS protection is required of ALL relay station receivers.
2. Reduction of relay station transmitter peak deviation is required.