Service manual

User Manual SD125E
Page 6
SD125E Transmitter Specification
Transmitter specification VHF UHF
Model Series SD-125E V2 SD-125E U2
Carrier Power
(Nom. Max. Min.)
Hi Power
Low Power
5W < 6W > 4.5W
1W<1.5W>0.8W
5W < 6W > 4.5W
1W<1.5W>0.8W
Sustained Transmission
Time 5 10 30Sec
(Nominal Conditions)
Power : >90% >85% >80% Power : >90% >85% >80%
Frequency Error
Nominal condition
Extreme condition
< 0.5 KHz
±5.0 ppm
< 0.75 KHz
±3.0 ppm
Frequency Deviation
25 KHz Channel Spacing
12.5 KHz Channel Spacing
Peak ±5.0, Min. ±3.8KHz
Peak ±2.5, Min. ±1.9KHz
Audio Frequency Response Within +1/-3dB of 6dB octave
@ 300 Hz to 2.55 kHz for 12.5 kHz C.S.
@ 300 Hz to 3.0 kHz for 25 kHz C.S.
Adjacent Channel Power
25 KHz Channel Spacing
12.5 KHz Channel Spacing
< 70 dBc @ Nominal Condition < 65 dBc @ Extreme Condition
< 60 dBc @ Nominal Condition < 55 dBc @ Extreme Condition
Conducted Spurious Emission < -36 dBm < -36 dBm
Modulation Sensitivity 100mV RMS @ 60% Peak Dev.
Hum & Noise :
25 KHz Channel Spacing
12.5 KHz Channel Spacing
> 40 dB (without PSOPH)
> 40 dB (with PSOPH)
Modulation Symmetry < 10% Peak Dev @ 1KHz input for nominal dev. + 20dB
Load Stability No osc at ≥ 10:1 VSWR all phase angles and suitable antenna
No destroy at ≥ 20:1 all phase angle
Peak Deviation Range
Adjustment @ 1 KHz, Nom
Dev + 20dB
25 KHz Channel Spacing
12.5 KHz Channel Spacing
Min. 3.5, Max. 6.0KHz
Min. 1.5, Max. 4.0KHz
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