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Technical Specifications

 

STL 20C - Specifications

Nov 23, 2017

Available Operating Frequencies

150 MHz BandRange from 135 to 185 MHz
230 MHz BandRange from 215 to 250 MHz
250 MHz BandRange from 235 to 265 MHz
330 MHz BandRange from 300 to 350 MHz
450 MHz BandRange from 430 to 480 MHz
950 MHz BandRange from 935 to 965 MHz

RF Specifications

Typical Max RF Output Power:
Power @ 135-140 MHz20 W
Power @ 140-180 MHz30 W
Power @ 180-185 MHz20 W
Power @ 215-250 MHz30 W
Power @ 235-245 MHz25 W
Power @ 245-265 MHz30 W
Power @ 300-315 MHz20 W
Power @ 315-350 MHz30 W
Power @ 430-480 MHz30 W
Power @ 480-520 MHz30 W
Power @ 840-870 MHz20 W
Power @ 900-935 MHz20 W
Power @ 935-960 MHz20 W
Power @ 960-965 MHz18 W
SelectionFrequency agile STL (internal rotary switches)
Deviation± 50 kHz standard; adjustable up to ± 200 kHz max
Stability over Operating Temperature range± 0.0001%
Agility and Accuracy (Models under 935 MHz):
For frequencies divisible by 5 or 6.25 kHz± 0.00004%
For MOST frequencies NOT divisible by 5 or 6.25 kHz± 0.00015%
Agility and Accuracy (Models over 935 MHz):
For frequencies divisible by 10 or 12.5 kHz± 0.00004%
For MOST frequencies NOT divisible by 10 or 12.5 kHz± 0.00015%

Audio Specifications

ModulationDirect FM (synthesized)
Type of technology to produce carrierPhase-locked loop (synthesized)
Spurious EmissionMore than 60 dB below carrier
RF Output Impedance50 Ohm
VSWR1.5:1 at all phase angles into 50 Ohm load
Mono Operation:
Connector Type15-pin D connector or external terminal strip
ImpedanceBalanced 600 Ohms
Level+8 dBm
Audio Bandwidth50 Hz to 15 KHz
Pre-emphasis0, 25, 50, and 75 µsec, user selectable
Signal To Noise≥74 dB, 75 µsec pre-emphasis, ±50 kHz deviation
Frequency Response (50 Hz to 15 kHz)±.05 dB
Distortion≤0.2% from 50 Hz to 190 kHz
Subcarrier Inputs (Select up to two)39 KHz, 67 KHz, 92 KHz, 110 KHz, 152 KHz, 185 KHz
Composite Operation:
Connector TypeBNC connector, unbalanced Female
Impedance75 Ohms
Level3 Vpp for 100% modulation
Audio Bandwidth53 KHz
Signal To Noise≥74 dB, 75 µsec pre-emphasis, ±50 kHz deviation
Frequency Response:
50 Hz to 53 kHz±.05 dB
53 kHz to 100 kHz±.1 dB
100 kHz to 190 kHz±.2 dB
Separation:
100 Hz to 1 kHz50 dB min
1 kHz to 15 kHz55 dB min
Distortion≤0.2% from 50 Hz to 190 kHz
Subcarrier Inputs (Select up to two)92 KHz, 110 KHz, 152 KHz, 185 KHz
Subcarrier Operation3 Vpp for 10% injection, 5K Ohms unbalanced, BNC connectors

Mechanical/Physical

Accessory Connector15 pin D connector or external terminal bus board for external DC power, remote control, balanced mono line level input
RF ConnectorType N female
Cooling RequirementsInstall in well ventilated rack
AirflowInternal flushing fan
Dimensions (Unpacked)3.5"H x 19"W x 15.5"D (8.9cm H x 48.3cm W x 39.4cm D)
Weight (Unpacked)9 lbs (4.1 kg)

Environmental

Operating Temperature-20° C to +50° C
Altitude10,000 ft (3048m) max
Humidity95% maximum, non-condensing

Electrical

Voltage:85-264 VAC; 47-63 Hz
AC Operation85-132 VAC or 176-264 VAC (manually switched internal linear supply), 50/60 Hz
DC Operation12-15 or 15-30 VDC via D connector
PA Current Draw6.5 to 8.5 amps at maximum power output
Power Consumption300 W Max (150 W typical)
Heat Dissipation300 W Max
Fuse2.5 amp slo-blo for 115 VAC operation, 1.25 slo-blo for 230 VAC operation

All Specifications Subject to Change Without Notice


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