Dual CT 1540 RC Serviceanleitung Seite 29

MUTING TRIGGER
Digital 24 hour — Quartz clock and timer circuitry
The tuner is equipped with a quartz precision digital time dis-
play and a timer circuitry for switching on and off of the tuner
and should they be connected, the remote-controlled amplifier
and cassette deck
When thebutton, marked FM or a STATIONS button program
med with a VHF transmitter is actuated, the unit automatically
Switches back to stereo.
Using the button marked CLOCK, the time can be faded in
even during a radio broadcast. To switch over to frequency or
channel display, the button must be pressed again. Furthermore
the time will always be displayed when the tuner is switched
off by the STAND BY. The clock only operates when the set
is switched on. For this reason, only switch off by pressing the
POWER button, if the unit is to be out of operation for any
length of time.
Order of button operation
Desred | SET | ser | SET MINU-
setting | TIMER | TIMER [CLOCK |HOURS| TES [TIMER | Indicator
START| STOP
Exact . . 9xxh
time 9.30h
. . 9.30h
switch-on | ш D 10.xxh
time10.400 а
. = | 1040h
Switch-off . . 11.xxh
time 11.50h
.
. 1150h
Remote control of tuner
Special accessories
Infrared receiver Dual RE 120
Specification
The Dual CT 1540 RC surpasses all values laid down under
German industrial Standard DIN 45 500 for HiFi stereo home
studio equipment.
FM Section
Waveband 87,5 — 104 MHz
Circuits
10 (6 IF)
Intermediate frequency 10.7 MHz
Antenna 60/75 and 240/300 ohm impedance
(at a deflection of 60 Q, 40 kHz and a signal/noise ratio of 26 dB
Mono <12uV Stereo <3uV
Muting control adjusting range 5 — 200 uV
mid position of the adjuster about 7 u V
Separation at + 300 kHz 250dB
Image rejection (Fe + 2 ZF) >70dB
Spurious signal rejection (Fe + ZF/2) > 100 dB
IF bandwidth 140 kHz (-3 dB)
Limiter operating point 13uV
Signal-to-noise-ratio, weighted
Mono, related to 1 kHz/40 kHz deviation
260dB
Stereo, related to 1 kHz/46 kHz deviation >57 dB
Signal-to-noise ratio, unweighted
Mono, related to 1 kHz/40 kHz deviation >60dB
Stereo, related to 1 kHz/46 kHz deviation >58d8
Harmonic Distortion
Mono, measured 1 kHz/40 kHz deviation «0.596
Stereo, measured 1 kHz/46 kHz deviation <05%
AF frequency response 40 — 12 500 Hz, —3 dB
Deemphasis 50 u
Automatic mono/stereo switchover
adjusting range 10 — 120 uV
mid position of the control about 25 uV
Channel separation at 1,000 Hz > 3048
Pilot tone attenuation 19 kHz > 35 dB
Subcarrier supression 38 kHz
>45 dB
AF output level ca. 800 mv
AFC-Captured RAnge *250/—150 kHz
+390/—200 kHz
AM Section
Waveband LW 150— 340 kHz
MW 510 — 1620 kHz
Intermediate frequency 460 kHz
Antenna high impedance (inductive)
(measured via dummy antenna according to German Industry
Standard DIN 45 300 for 6 dB S/N ratio
MW=15uV LW= 20 uv
Line voltages 115 and 230 V
Fuses at 110V 025 A medium-blow
at 220 V 0.125 A medium-blow
2612065 2/1079
Printed in Germany by Dual