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TX50 FM transmitter,stereo encoder,audio limiter
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The STL50 is a very robust link transmitter operating in band 1 between 48-68MHz. Further, It has been designed to operate under severe temperature and humidity conditions, without the need of cooling. The unit employs a very sophisticated built in stereo encoder, a very low distortion audio limiter, balance inputs, SCA inputs as well as RS-232 ports for remote control operation. The STL-50 provides a broadband RF power of 50W adjustable, complete monitoring from the LCD display , menu control via the front panel push button. Furthermore, is equipped with a universal mains,mains filter, Automatic Gain Control such as to auto adjust its RF power on the load\'s VSWR.
Band 1 Broadband Operation,
Very Reliable,
Very Affordable,
LCD Monitoring,
Three modes selectable Menu
RS-232 for remote control operation.
Universal Mains
2U
RF Section Power 0-50W (adjustable)
Connector N-Type 50 Ohm
Harmonics <75 dBc Spurious <90 dBc Frequency Range 48-68 MHz usable from 45 to 75 MHz Frequency Lock Range 45-75MHz Frequency selection steps 100kHz,
Frequency selection Internal rotary switches
Frequency control type Phase locked loop
Frequency Stability +/- 2PPM TCXO
Modulation Direct frequency modulation
Frequency Mute time 8 seconds
RF Monitor Output BNC -55dB
Audio Section Left-MPX, Right-MONO input Balanced XLR male
Left-MPX audio input response +/- 0.3 dB 5 Hz to 100 kHz
Left-MPX input level -40dB to +5dB (adjustable)
Right-MONO input Level -40dB to +30dB balanced (adjustable)
Right-MONO audio input response 20 Hz to 15kHz +/- 0.5dB (0us pre- emphasis)
SCA input level BNC -40dB to +5dB (internally adjustable)
SCAs audio input response +/- 0.3 dB 5 Hz to 100 kHz
Output level (BNC) 0 to 5dB (adjustable)
15 kHz filtering >40dB at 19kHz mono Input
Pre emphasis 0, 50 & 75uS selectable
Limiter +18dB Limiter on/off Internal Switch Stereo Encoder Stereo Pilot 19kHz +/- 1 Hz
Output level (BNC) 0dB
15 kHz filtering >40dB at 19kHz
15kHz overshoot filter clipping on or off
Spurious >80 kHz >60dBr
Spurious >160 kHz >80dBr
Stereo separation >60dB (20Hz-15kHz)
Controls Protections Automatic RF Gain Control (AGC) V.S.W.R. Temperature Remote Control 9 way D-Type LCD Monitor LCD Display 16X4 LCD with back light LCD Menu 3 modes Mode1 Monitor Frequency, FWR, REF, DEV Mode2 Monitor FWR, REF, TEMP Mode3 Monitor Audio Left / Right VU meter Other Cooling 2 x 80mm depression fan
Size 400mm x 88mm x 450mm
Weight 7kg Voltage input 85-260 VAC
Power connector IEC,FUSED
Switched mode supplies Approvals UL/TUV/CE
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