MICROSET ST-30

The new professional ST-30 is a high performance µ-processor controlled FM RADIO broadcast mono/stereo transmitter with very low THD - IMD distorsion and SCA, RDS and MPX facility.

Features

- Frequency 87,5-108 MHz
- Excellent stereo and mono operation
- Extremely low distortion THD-IMD
- Very low noise
- High stereo performances
- µP controlled - RDS facility - digital input audio facility
- Seven memory programs, step frequency 10 kHz
- Easy frequency programming and set-up
- Full broadband BW > 20 MHz
- Remote control and programming RS485
- Full control and protection of output power and deviation
- Very reliable, compact, strong and long service
- Compliance to C.C.I.R. & F.C.C. Standards

RF Characteristics

Power Output	:	30 W adjustable from front panel
RF output impedance	:	50 Ohm unbalanced, VSWR less than 1.5:1
Frequency range	:	87.5 to 108MHz, 7 channels (10 kHz / step µp selected) storable and recalled from panel
Frequency control	:	Synthesizer µ-processor controlled
Off lock attenuation	:	> 80dBc (typical -85 dB)
Type of modulation	:	F3E / F8E direct FM at the carrier frequency
Modulation mode	:	Mono, Stereo, Multiplex, SCA, RDS, AUX (input selected by front panel)
Frequency deviation	:	±75kHz = 100%, ±150 kHz capability
Short term stability	:	± 1ppm from -5 to +45°C, can be synchronized by 1-2-2.5-5-10MHz
Instantaneous BW	:	> 20MHz
RF harmonics	:	Exceeds EBU/CCIR/FCC requirements < -70dBc
RF spurious	:	Exceeds EBU/CCIR/FCC requirements < -100dBc @ ± 1MHz min. (typical -110dB)
Preemphasis	:	Flat/50/75µs selectable via front panel – precision typical 0,4%
Stereo operation	:	CCIR 450/S2 "pilot tone system"

Stereo Operation

Stereo Separation	:	>53 dB (typ. 56 dB) 30 ÷ 80 Hz , >60 dB (typ.70 dB) 80 Hz ÷ 15 kHz
Crosstalk attenuation (M / S)	:	> 40 dB 30 Hz ÷ 15 kHz (typ. 55 dB 100 Hz ÷ 8 kHz)
THD+N on encoded channels	:	< 0.03% 30 Hz ÷ 15 kHz (typ. -74 dB)
IMD - Distortion	:	< 0.03% Typ. IMD D2 < -83 dB D3 < -88 dB
Audio filter attenuation	:	> 55 dB @ 19 kHz ; > 45dB 19 kHz ÷ 100 kHz
Common mode rejection	:	> 45 dB 20 Hz ÷ 15 kHz
Spurious products	:	> 53 kHz > 50 dB
38 Hz suppression	:	> 70 dB (typ. -85 dB)
Sub carrier frequency	:	38 kHz ± 2 Hz
Pilot frequency	:	19 kHz ± 1 Hz
Phase difference	:	19/38 kHz 0°± 2° adjustable
TIM (DIM30)	:	< 0.03 % (square/sinus) Typ. < -77 dB
Nominal pilot deviation	:	± 7 kHz

Mono Operation

Audio response	:	± 0.15 dB 20 Hz ÷ 15 kHz (+0 / -2%)
THD+N on encoded channels	:	30 Hz to 15 kHz < 0.02% ( typ. 0.03% ) typ. -74 dB
IMD	:	D2 < -75 dB , D3 < -80 dB (Typ. D2<-80 dB, D3< -85 dB) (measured with a 1 kHz and 1.3 kHz tones, 1:1 ratio, @ FM 75kHz)
TIM (DIM30)	:	< -70dB (Typ. < -77dB) (measured with square wave 2.96 kHz - sine wave 14 kHz @ 75 kHz FM )

Physical & Electrical

Dimensions	:	Standard 19" chassis rack
Cabinet	:	D 385 mm x W 485 mm
Antenna output	:	N connector female
Weight	:	4.5 kg approx.
Power supply	:	230V single phase AC (+10 / -15%) 50-60 Hz ± 5%
Human interface input device	:	Rotary encoder with pushbutton or USB
Acoustic Noise	:	< 56dBA Leq 3min @ 1m
Cooling	:	Forced air, with internal long life brush-less ball bearing fan

Environmental

Storage temperature	:	- 20°C + 60°C
Operating temperature	:	- 5°C + 45°C
Guaranteed performances temp.	:	0°C + 40 °C
Relative humidity	:	90% max (no condensing)
Max. operating altitude	:	2000 m
Max. extraneous field strength	:	=10V/m ; = 4A/m