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Technical Specifications
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SRPT 30 - Specifications
The new SRPT 30 is the replacement transmitter for the well-known RPT 30. This model incorporates the proven synthesizer and RF amplifier technology that has been proven in the SRPT 40A and the STL 20C. The features are similar to the RPT 30, but is wide band so there is no minimum separation of the two frequencies as long as they are within the band selected. This two-channel synthesized RPU transmitter is available in bands from 135 MHz to 965 MHz.
Marti SRPT 30 without Rack Ears
Available Operating Frequencies
150 MHz Band: Range from 135 to 185 MHz
230 MHz Band: Range from 215 to 250 MHz
250 MHz Band: Range from 235 to 265 MHz
330 MHz Band: Range from 300 to 350 MHz
450 MHz Band: Range from 430 to 480 MHz
950 MHz Band: Range from 935 to 965 MHz
RF Specifications
Typical Max RF Output Power: 
Power @ 135-185 MHz: 30 W
Power @ 215-250 MHz: 30 W
Power @ 235-265 MHz: 30 W
Power @ 300-315 MHz: 30 W
Power @ 315-350 MHz: 30 W
Power @ 430-480 MHz: 30 W
Power @ 935-960 MHz: 20 W
Power @ 960-965 MHz: 30 W
Selection: Any two frequencies within selected band can be factory set with 5 and 6.25 kHz steps
Deviation: Adjustable, ±20 kHz max
Stability over Operating Temperature range: ± 0.0001%
Agility and Accuracy: 
For frequencies <480 MHz divisible by 5 kHz or 6.25 kHz: ± 0.00004%
For MOST frequencies <480 MHz NOT divisible by 5 kHz or 6.25 kHz: ± 0.00015%
For frequencies >800 MHz divisible by 10 kHz or 12.5 kHz: ± 0.00004%
For MOST frequencies >800 MHz NOT divisible by 10 kHz or 12.5 kHz: ± 0.00015%
Audio Specifications
Modulation Control: Broadcast quality compressor/limiter built-in
Audio Input Level: 
Mic In: -68 dB to -35 dB
Line In: 0 to +10 dBm, 8-600 Ohms
Mono Operation: 
Frequency Response: 
50 Hz to 3 kHz: ± 1.5 dB, 1.5 kHz Dev
50 Hz to 7.5 kHz (Standard): ± 1.5 dB, 5 kHz Dev
50 Hz to 10.5 kHz: ± 1.5 dB, 7.5 kHz Dev
Signal To Noise: ≥ 53 dB, 5 kHz deviation, 75 µsec pre/de-emphasis
Frequency Response: ±1.5 dB from 50 Hz to audio bandwidth, 75 µsec pre-emphasis
Distortion: ≤ 2% from 50 Hz to audio bandwidth, 75 µsec pre-emphasis
Spurious Emission: More than 60 dB below carrier
Encoding: Sub-audible (27 Hz) tone encoder built in
RF Output Impedance: 50 Ohm
Mechanical/Physical
Audio Inputs: 4 balanced microphone (150 Ohm) inputs (XLR-3) with mixing controls, 1 input switchable to balanced line level at no. 4 input and D connector on rear
Accessory Connector: 15-pin D connector for DC power, remote control, encode, line level input
RF Connector: Type N female
Dimensions (Unpacked): 3.5"H x 11.5"W x 14.3"D (8.9cm H x 29.2cm W x 36.8cm D)
Weight (Unpacked): 8.25 lbs (3.74 Kg)
Environmental
Operating Temperature: -10° C to +45° C
Altitude: 10,000 ft (3048m) max
Humidity: 95% maximum, non-condensing
Electrical
Approx PA Current Reading (at max power output): 6.5 A to 7.5 A
Power Requirements: 
AC: 110-120 VAC or 220-240 VAC (manually switched internally on power supply), 50/60 Hz
External DC: 12-15 V to 15-30 V
Power Consumption: 300 W Max (150 W Typical)
Heat Dissipation: 300 W Max
Fuse: 2.5 A Slo-Blo for 115 VAC operation, 1.25 A Slo-Blo for 230 VAC operation