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NT20 transmitter

 

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NT 20

Phase Locked Loop Programmable 

20W FM Exciter/Transmitter 87.5 - 108 MHz Range

FCC and Industry Canada Approved

 

Mono $1460 USD   Stereo $2260 USD

 

 

 

bullet

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

bulletInstant front panel programmability in 10 kHz increments
bulletAll functions via LCD meter (password protected)
bulletAdjustable power output from 2 to 20 W with automatic power control maintaining the output at any pre-set level
bulletFSK ID Keyer optional
bulletMeets or exceeds all FCC and CCIR requirements
bulletHigh reliability provided by conservatively rated component

 

TECHNICAL SPECIFICATIONS

Rated Output Power: 2-20 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 rotary switch in 10 kHz increments
Frequency Stability: better than 5 ppm (± 500Hz)
Modulation Type: direct carrier frequency modulation
Emission class: F3E
Spurious & Harmonic Suppression: < - 80 dB or better
Stereo Separation: 50 dB @ 1 Khz
Distortion: < 0.1 % (typ. 0.08 %)
Asynchronous AM S/N Ratio: 60 dB below reference carrier with 100% amplitude modulation at 400 Hz without de-emphasis, no FM modulation present
Synchronous AM S/N Ratio: 55 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 internally switchable
Power Consumption:    approx. 60 W from AC
Panel Size:  483 mm (19") W x 88 mm (3.5") H (2 standard rack spaces high)
Overall Depth: 327 mm (13")     
weight: 5 Kg (11 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: 1 for MPX
MPX Input:   1 unbalanced BNC connector
MPX Input Impedance: 2k ohm
MPX Input Level: 0 dBm (775 mVrms/2.2 Vp-p) for ±75 kHz, adjustable
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: 0.08% 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 >50 dB (55 dB typical)
Monaural Operation   
Audio Input Impedance:  2k ohm
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: 0.08% 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

 
 
Postal address
Wavemach Communications
320 Dixon road, Suite 302
Toronto, Ontario, CANADA
M9R-1S8, entry code 131
 
Electronic mail
fm@fmamplifiers.com