Sennheiser FT-902S15, FT-906B20, FT-905A, FT-902S35, FT-906A20, FT-902S50 manual Technical data

Technical data 5

Frequency range

Bandwidth

Channel spacing, min. Channel grid, min.

1st oscillator frequency (1st LO) 1st intermediate frequency (1st IF) 2nd oscillator frequency (2nd LO) 2nd intermediate frequency (2nd IF) Deemphasis

Nominal deviation/Peak deviation AF outputs

450 - 790 MHz with RX module item no. 03246 760 - 960 MHz with RX module item no. 03247

24MHz

300kHz

5 kHz

71MHz below / above Fe

71MHz 81.7 MHz 10.7 MHz

50∝ s

±40 kHz / ± 56 kHz

3 x XLR connectors with a balanced AF output signal, min. load impedance 600 Ω

Nominal audio level	+ 12 dBm
Peak audio level	+ 18 dBm
THD for peak deviation	≤	1 % (typ. < 0,5 %)
Audio frequency range (+1 dB / -2 dB)	40 Hz - 20 kHz
Compander	HIDYN plus® ( internally defeatable)
Diversity	RF signal-dependent selection of AF outputs
Squelch	adjustable threshold (0-100 ∝ V RF input voltage)
S/N = 52 dB (unweighted, with HIDYN plus®)≤		1.5 ∝ V (typ. 1 ∝ V)
S/N max. (peak deviation, with HIDYN plus®) ≥		112 dBA eff. / ≥	100 dB CCIR peak
Limiter threshold	≤	1 ∝ V *
Intermodulation attenuation	≥	76 dB
Rejection of adjacent channels	≥	66 dB
Suppression of spurious and harmonics	≥	100 dB *
Blocking	≥	85 dB *
Image rejection	≥	100 dB *
Spurious emissions (RF)	≤	- 80 dBm at HF - input
RF inputs	2 x N - sockets
Monitor socket	6.3 mm-ø jack, max. +18 dBu / 600 Ω ,
	short-circuit proof, min. load imp. 50 Ω ,
	gain: +20 dB (adjustable) and +20 dB (switchable)
Indicators	Monitor:		3 LEDs for operating voltages
			2 LEDs for booster supply voltage
			2 LEDs for booster overload
			1 LED for remote operation
	RF input:		2 LEDs for booster supply voltage
	RX modules:		8 digit alphanumeric LED display
			(text or frequency)
			2 diversity LEDs,
			1 monitor LED,
			2 x 16 digit LED bargraph display
			for dev. and RF IN
Operating elements	Monitor:		mains switch, remote switch
			+20 dB switch,
			+20 dB regulator
	RX modules:		6 keys
	RI module:		2 switches for booster voltage
			2 NF-PAD, 20 dB attenuation
Booster supply voltage	2 x 12 V, max. 150 mA, current limiter, switchable
Supply voltage	12 - 16 V / 3 A DC, protective low voltage
Power consumption	max. 30 W
Mains connection	4-pin XLR, for plug-in PSU (different for each country)
Housing	19" rack, 4 height units, 34 BE
Dimensions	approx. 200 mm x 360 mm x 190 mm
Weight	approx. 7 kg (incl. all modules)
Approval number (Germany)	A 102 932C RF (BZT

*with AB 1036 antenna booster connected in series. GZA 1036 antenna recommended.