Beyerdynamic SIR 320 operating instructions Technical data

Technical data

Complies with standards IEC 914 and IEC61603-3(in normal operation)

Number of channels:	up to 32 (in dependence of type) regarding IEC 61603-2 and IEC 61603-7
Modulation:	FM
Transmission frequencies:	55 kHz - 1335 kHz in 40 kHz pattern for OR - Ch31
Intermediate frequency:	455 kHz
Operating mode:	Superhet receiver with PLL Synthesizer
Angle of reception:	120° horizontal / 100° vertical
Frequency response:	125 - 8.000 Hz
Distortion factor:	< 2 %
Signal / Noise ratio:	> 55 dB
Headphone socket:	3,5mm (DIN 455838)
Headphone impedance:	32 - 600 Ohm
Operating voltage:	3.6 ... 4.5 Volts
Power supply:	3 x rechargeable batteries NiMH 1.2V / 750 mA/h (AAA)
	or 3 x disposable batteries 1,5V (AAA)
Operating time	up to 75 hours (rechargeable batteries)
	up to 120 hours (disposable batteries)
Display:	seven-segment 2 digit LCD (Liquid Crystal Display) back lighted
	(white text / black ground)
Test functions:	Battery voltage and IR-field strength via LCD
Temperature range:	(operating) +10°C ... +40°C
	(storage) -20°C ... +50°C
Humidity:	< 80%, not condensed
Size:	150 x 50 x 25 mm
Housing:	ABS-plastic, grey
Weight:	approx. 150g (incl. batteries)

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