Service manual

Service Manual SD170E Series
Page 10 of 44
Transmitter Specification
VHF
UHF
Model Series
SD-171E
SD-174E
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 30 Sec
(Nominal Conditions)
Power : >90% >85% >80%
Power : >90% >85% >80%
Frequency Error
Nominal condition
Extreme condition
< 0.5 KHz ±2.5 ppm
< 0.75 KHz ±2.5 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. 6.0
Min. 1.5, Max. 4.0
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