Troubleshooting; Specifications - Tecsun S-2000 Owner's Manual

TROUBLESHOOTING

PROBLEM PROBABLE CAUSE
Can't turn on the radio (A) Power connection.
or no display or light. (B) Batteries are discharged
or not installed for portable
operation, no AC power.
The radio auto turns off (A) Batteries are discharged.
while listening. (B) Activate the alarm by radio.
(C) Sleep time is over.
Noises or nothing (A) The signal is too weak.
stored into memory
when ATS. (B) Strong interference nearby.
No reception when The antenna selection switch
using external antenna. is on INT. ANT.
Only noises is heard There is no station stored into
when alarm by radio. TIMER A or TIMER B or the
station is sleep when alarm by
radio.
No stereo when using (A) FM signal is too weak.
earphones. (B) FM ST. is set to MONO.
(C) The broadcast is MONO.
No function. The MCU is in accident.
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SOLUTION
(A) Check power supply cables.
(B) Check/re-install batteries for
portable operation.
(A) Check/re-install batteries.
(B) Turn on the radio again.
(C) Turn on the radio again.
(A) Manually tuning or direct key
in frequency.
(B) Use the ANT.ATT or shorten
the telescope antenna, then
ATS.
Switch it to EXT. ANT. position.
Store a station into TIMER A or
TIMER B.
(A) Try to change the antenna's
direction and its length, or use
an external antenna.
(B) Set the FM ST. to stereo.
Use the RESET button to reboot
the unit.
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SPECIFICATIONS

Frequency range
LW 100-519kHz
MW 522-1620kHz ----------------- system code "09"
520-1710 kHz (America) -- system code "10"
SW 1711-29999kHz
AIR
118-137MHz
FM
87-108MHz
76-108MHz (Japan)
87.5-108MHz (America)
Sensitivity
LW (S/N=26dB) Less than 3mV/m
MW (S/N=26dB) Less than 0.35mV/m
SW (S/N=26dB) Less than 18μV
SSB (S/N=10dB) Less than 1μV
AIR (S/N=10dB) Less than 5μV
FM (S/N=30dB) Less than 3μV
Selectivity
AM Wideband ±10kHz, Greater than 40dB
Narrowband ±5kHz, Greater than 60dB
FM Stereo crosstalk Better than 30dB
Signal to Noise Ratio
MW Greater than 45dB
SW Greater than 50dB
FM Greater than 60dB
IF Frequency SSB, AM: 1st IF : 55.845MHz
2nd IF: 455kHz
FM: 1st IF: 10.7MHz (Single Conversion)
Image Rejection
MW/LW/SW 55.845MHz： Greater than 90dB
455kHz：
AIR Greater than 90dB
FM Greater than 60dB
IF Rejection
AM 55.845MHz： Greater than 60dB
455kHz： Greater than 60dB
FM 10.7MHz： Greater than 100dB
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Greater than 80dB
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