Lectrosonics UM250b User Manual download pdf (Page 16)

SPECIFICATIONS AND FEATURES

Operating frequencies: 470 to 608 MHz, 614 to 806 MHz

Frequency selection: 256 frequencies in 100kHz steps

RF Power output: 250 mW

Pilot tone: 32.764 kHz (± 2Hz); 5kHz deviation

Frequency stability: ± 0.002%

Deviation: ± 75 kHz (max)

Spurious radiation: 90 dB below carrier at frequencies less than 1GHz

Equivalent input noise: -126 dBV

Input level: Nominal 2 mV to 300 mV, before limiting.

Mic input greater than 2V, with limiting.

Line input greater than 20V, with limiting (Input to pin 5,

pin 4 tied to ground.)

Input impedance: Taps provided for dynamic, electret and line level.

Mic load impedance greater than 4k.

Line load impedance greater than 10k.

Input compressor: Soft compressor, >30 dB range

Gain control range: 43 dB; semi-log rotary control

Modulation indicators: Dual LEDs indicate modulation level 12 dB below limiting

and at the onset of limiting.

Controls: 2 position “OFF-ON” slide switch for noiseless turn on/turn

off operation. Front panel knob adjusts audio gain. Re

cessed control on side panel adjusts low frequency rolloff.

Rotary switches on side panel adjust transmitter frequency.

Audio Input Jack: Switchcraft 5 pin locking (TA5F)

Antenna: Detachable, flexible bronze cable supplied. 50 Ohm port

allows connection to test equipment.

Battery: Precision compartment auto-adjusts to accept any known

alkaline or lithium 9 Volt battery. (We’ve tried 150

different ones!)

Battery Life: 2 Hours with alkaline 9 Volt, 7 hours with lithium

Weight: 6.6 ozs. including battery

Dimensions: 3.1 x 2.4 x .75 inches

Emission Designator: 160KF3E

Specifications subject to change without notice.

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Lectrosonics UM250b User Manual Page 16