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NT250 transmitter

 

 

NT 250

Phase Locked Loop Programmable 

250W FM Exciter/Transmitter 87.5 - 108 MHz Range

FCC and Industry Canada Approved

 

   Mono $4160 USD    Stereo $4875 USD

 

 

Includes low pass/harmonic filter and can be used as a stand-alone transmitter

All functions via LCD password protected
Instant front panel programmability in 10 kHz increments
Adjustable power output from 5 to 250 W with automatic power control maintaining the output at any preset level
Remote control features include: power on/off, fwd & ref power metering, RS232 compatible (optional)
FSK ID Keyer optional
FCC and IC certified
Software for monitoring remote control features (optional)

 

TECHNICAL SPECIFICATIONS

Rated Output Power: 2-250 W continuously variable (ALC)
RF Output Connector: "N" type female
RF Output Impedance: 50 ohm
Frequency Range: 87.5 MHz to 108 MHz
Frequency Programmability: direct from front panel in 10 kHz increments
Frequency Stability: better than 5 ppm (± 500 Hz)
Modulation Type: direct carrier frequency modulation
Spurious & Harmonic Suppression: < - 80 dB or better
Stereo Separation 55 dB @ 1 Khz
Distortion < 0.1 % (typ. 0.06 %) @ 1 Khz
Asynchronous AM S/N Ratio: 65 dB below reference carrier with 100% amplitude modulation at 400 Hz without de-emphasis, no FM modulation present
Synchronous AM S/N Ratio: 60 dB or better below reference carrier with 100% amplitude modulation at 400 Hz, without de-emphasis, FM modulation = ±75 kHz at 400 Hz
AC Power Requirement: 117 or 230 V, ±10%, 50-60 Hz, single phase
Power Consumption: approx. 450 W from AC
Panel Size: 483 mm (19") W x 132 mm (3.5") H (2 standard rack spaces high)
Overall Depth: 410 mm (16")
Weight: 10 Kg (22 Lbs)
Ambient Temperature Range: 0° to 50° C (32° to 122° F)
Pre-emphasis: for FCC 75 µsec; for CCIR 50 µsec internally selectable

Composite Operation

Composite Inputs: four total, 1 for MPX and 3 for SCA
MPX Input: 1 unbalanced BNC connector
MPX Input Impedance: 2k ohm
MPX Input Level: 3.5 Vp-p (1.237 Vrms/3.64 dBm)
Composite FM unweighed S/N ratio: >68 dB below ±75 kHz deviation at 400 Hz measured in a 30 Hz to 100 kHz bandwidth with 75 µsec de-emphasis (RMS)
Composite Total Harmonic Distortion: 0.05% typical
Composite Intermodulation Distortion: 0.05%, measured with a 1 kHz and a 1.3 kHz tone, 1:1 ratio, at 100% modulation
Baseband: 30 Hz – 60 Khz within 0.15 dB
Crosstalk: main to stereo subchannel and stereo subchannel to main >55 dB (60 dB typical)
SCA Inputs: 3 unbalanced BNC connectors
SCA Input Impedance: 10k ohm
SCA Input Levels: 0 dBm (775 mVrms/2.2 Vp-p) nominal for ±7.5 kHz deviation, adjustable
SCA Amplitude Response: ±0.8 dB, 40 kHz to 100 kHz
Crosstalk: 67 kHz SCA to main or to stereo subchannel >65 dB
Crosstalk: 92 kHz SCA to main or to stereo subchannel >70 dB

Monaural Operation

Audio Input Impedance: 600 ohm balanced or unbalanced; 50 dB common mode suppression
Audio Input Level: 0 dBm (775 mVrms/2.2 Vp-p) for ±75 kHz, adjustable
FM S/N Ratio: >70 dB below ±75 kHz, deviation at 400 Hz measured in a 30 Hz to 20 kHz bandwidth with 75 µsec de-emphasis (RMS)
Audio Frequency Response: ±0.8 dB, 30 Hz to 15 kHz
lntermodulation Distortion: 0.05% or less, measured with a 1 kHz and a 1.3 kHz tone, 1:1 ratio, at 100% modulation

 

Contact Information:

Telephone

416-243-2260

 
Fax

973-909-8447

 
 
Address
Wavemach Communications
320 Dixon road, Suite 302
Toronto, Ontario, CANADA
M9R-1S8, buzzer code 131
 
E mail
fm@fmamplifiers.com
 

Contacto:

Teléfono

Para español por favor contáctenos por e-mail

Fax

973-909-8447

 
 
Dirección
Wavemach Communications
320 Dixon road, Suite 302
Toronto, Ontario, CANADA
M9R-1S8, buzzer code 131
 
E'mail
fm@fmamplifiers.com