Service manual

Service Manual SD170E Series
Page 11 of 44
Receiver Specification
VHF
UHF
Model Series
SD-171E
SD-174E
Sensitivity (@ 12dB SINAD)
25 KHz Channel Spacing
12.5 KHz Channel Spacing
< 0.28uV
< 0.30uV
< 0.28uV
< 0.30uV
Sensitivity (1/100 Error Rate)
With ACC-513
With ACC-514
< -113dBm
< -110dBm
< -113dBm
< -110dBm
Amplitude Characteristic
> -3dB , < +3dB
> -3dB , < +3dB
Adjacent Channel Selectivity
25 KHz Channel Spacing(Nom.)
(Extreme Condition)
12.5 KHz Channel Spacing(Nom.)
(Extreme Condition)
> 70 dB
> 60 dB
> 65 dB
> 50 dB
> 70 dB
> 60 dB
> 65 dB
> 50 dB
Spurious Rejection(100KHz ~ 4GHz)
> 70 dB
> 70 dB
Image / Half IF Rejection
> 70 dB
> 70 dB
Intermodulation Response Rejection
±25 kHz/ 50 kHz
±50 kHz/ 100 kHz
> 70 dB
> 70 dB
> 70 dB
> 70 dB
Conducted Spurious Emission
9 KHz - 1 GHz
1 GHz – 4 GHz
< - 57 dBm
< - 47 dBm
< - 57 dBm
< - 47 dBm
RX Spurious Emissions (Radiated)
9 KHz - 1 GHz
1 GHz – 4 GHz
< - 57 dBm
< - 47 dBm
< - 57 dBm
< - 47 dBm
AF Distortion :
Nominal condition
Extreme condition
< 3%
< 10%
< 3%
< 10%
RX Hum & Noise (only audio)
25 KHz Channel Spacing
12.5 KHz Channel Spacing
< 40 dB without PSOPH
< 40 dB with PSOPH
Receiver Response Time
< 16 ms
< 16 ms
Squelch (factory pre-set)
Open
Close
-113dBm
-116dBm
Squelch Attack Time :
RF Level at Threshold
RF Level at Threshold + 20dB
< 20 ms (RSSI), < 40 ms (Analog)
< 10 ms (RSSI), < 30 ms (Analog)
Squelch Decay Time
5 ms Min., 20ms Max.
Antenna Socket Input Match
> 10 dB Return Loss
Temperature Stability for
L.O. Frequency
1st < 5 ppm, 2nd < 15 ppm from -30° to + 60° C
L.O. Frequency Aging Rate
±2 ppm/ year
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