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RADIATED POWER: Relative radiated power, measured from 0 to 5; it indicates the increase at the RF power due to the
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audio processing chain.
A unity value means a standard audio compressor (12 dB peak/average ratio).
A value of "4" indicates a 100 % modulation with continuous sine wave
MULTIPATH DISTORTION: Relative indication from BAD to 5 levels of GOOD
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NOISE: L & R noise level; -40 to -90 dBa, +/- 3 dB; 20-10 KHz, «A» weighted. Automatic measure using brief samples of the
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silences associated with the normal FM program.
STEREO CROSSTALK: L-R and R-L separation, from 0 to 50 dBa, +/- 2 dB. Automatic measurement during brief samples of
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music with panning effects used by recording engineers.
HARMONIC DISTORTION: 0.02 % to 5 %. It measures 2nd and even harmonic distortion due to the FM modulation process.
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Automatic measurement is performed using the speaker voice and measuring the Modulation Transfer Function of the voice.
Then, is processed (DSP), using the Bonello algorithms.
FREQ RESPONSE: 30 Hz to 15 KHz; +/- 1 dB Automatic measurement using 8 spots of 5 sec each, to be aired during night
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(only one spot each hour is enough). The spots are provided with the VA-16X CD-ROM (WAV files).
SPECTRUM ANALYZER: Selectable frequency span, from +/- 250 KHz to +/- 1 MHz in 25, 50 and 100 KHz steps. Bandwidth
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is 10 KHz. Measure range = 50 dB, +/- 3 dB.
MODULATION BANDWIDTH: Graph of % MOD from zero to +/- 150 KHz, BW of measure = 10 KHz
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SCANNER: Frequency scan of all the odd FM band channels, from 87.5 to 108 mHz.
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5.5 Printed records of on-air performance
The VA-16X can store, at the PC computer, record files of the total performance of the FM Radio, 24 hrs a
day, one file each day. Several months can be stored and sent by E-mail to the main Engineering Office to be
audited. The On-Air performance can be seen from the PC screen or can be printed in color. It is updated
every hour and has the following items:
RADIATED POWER: Average of radiated power during each hour. Last hour is shown on screen. It gives information about the
quality of the audio processing chain and the average coverage area of the Radio.
MAX MODULATION: The peak value of modulation is stored each hour. Last hour is shown on screen. It gives valuable
information about the quality of the audio processors and the efforts of your Chief Engineer to avoid overmodulation.
3 SEC SILENCE: If a silence of 3 sec or more is produced (program gap), this event is stored. You can control the number of
gaps/hour. Last hour shown on screen. It allows the manager to know the commitment level of the djs and audio operators.
REVERSE PHASE: Each time a spot, commercial, musical tune, etc, is aired with its stereo phase reversed, the event is stored.
Last hour is shown on screen. It gives information about the care your Engineers take to avoid bad audio connections.
L & R LEVEL: Left & Right average audio level is recorded each hour.
STEREO PHASE: The stereo correlation phase is averaged and recorded each hour. It gives information about the average stereo
quality sensation of the CDs and music sound sources the Radio is using.
24 Hrs printed log includes all the above and: Field Intensity, Channel Separation, L-Noise, R-Noise, Pilot Error, Pilot Level,
Carrier Deviation and THD Distortion.
MODELS & OPTIONS
VA 16X/RK
Model for use in rack or table top, with steel case and vertical whip antenna with magnetic base.
VA 16X/LCD
Idem model RK, PC operated or stand-alone unit. With 2 x 40 backlighted LCD display
VA 16X/P/LCD
Portable model, with carring bag and whip antenna.. Internal Battery; 4 Hs continuous operation for stand-alone or
Laptop use. Internal battery charger, 220 / 117 V 50/60 Hz operation.
/CAL
Crystal calibrator for 0,1 % modulation precision
/IP
Ethernet connection for working with remote control without PC
/AR202
Software for 2 channels recording at the PC Then the sound of the radio station is available from any place using
Internet
/ADA102
This encoder allows for real time MP3 streaming transmission of the tuned radio station
/RDS
Additional internal RDS receiver and decoder for RDS parameters analyzer
DIMENSIONS: 19" rack mount. Module one (44,4 mm) Weight: 6 Kg
POWER: 100 V - 240V (user selectable) 50/60 Hz, or Ni-Cad battery in models /P
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VA 16 Virtual Monitor
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