Technical Specs VA-16X
INPUT & OUTPUT
RF input: BNC connector
Audio output : L&R two XLR balanced +4 dBu
MPX input: 1Vrms for 100% mod.
MPX output: 1Vrms for 100% mod. Z out = 220 ohm
Headphone: (front panel) 1/8” Stereo , volume control . (32 – 600 ohm)
Peak weighting selector: DIP switch 5 – 2 – 1 – 0,5 msec
RS232 Control : 9 pin D Female Connector
Optional: -Ethernet TCP/IP Control Module , RJ45
-RDS Analyzer: USB connector type B, status led's, aux. Headphone output
-Modulation Calibrator : Test button – preset adjust
FREQUENCY RANGE: 87.5 - 108 MHz
FM CHANNELS: 50 KHz steps
PRESET FM STATIONS: 16 Preset Memories, including Name
FRONT END: Dual Gate Mosfet
IMAGE REJECTION: 50 dB
IF REJECTION: 80 dB
SENSIBILITY: 40 dB/uV for 12 dB SINAD
NOISE: S/N ratio > 60 dBA
THD Distortion: 0,5 % at 1 kHz 100% MOD
IF BANDWIDTH: 270 Khz for audio / 10 KHz Bandwidth and Spectrum modes
FREQ RESPONSE: 20-60 KHz, +/- 0,2 dB
STEREO DECODER ( MPX INPUT):
- Output Level : +4 dBu Balanced
- SNR : > 85 dBA
- THD : < 0,02% Mono & Stereo
- Stereo Separation: 50 dB @1Khz
- Pilot Tone attenuation: 50 dB
- De-emphasis: 75 usec (50 uS on demand)
TEST MEASUREMENTS AND DIGITAL PROCESSING
-MODULATION: FM Modulation from 10 % to 160 %;
Error: less than 2 % at 100% modulation
Optional: 0,1 % precision internal crystal calibrator for 100% modulation
-Fast Peak: measure less than 200 uS or Peak Weighting 5, 2, 1, 0.5 msec
-FM deviation peak from 0 to 120 KHz
-OVERMODULATION: peaks/minute counter of peaks over 105 % modulation
-FIELD INTENSITY: 40 to 99 dB uV with user defined correction
factor for antenna gain. Error less than 2 dB at 100 MHz
-PILOT TONE LEVEL: 19 KHz pilot level, from 0 to 20 % in 0.1 % steps. Error < 0.5 %
-PILOT TONE FREQUENCY: Frequency error from -99 to + 99 Hz +/- 0.5 Hz
-RDS SUBCARRIER LEVEL: 57 KHz pilot level, from 0 to 10 % in 0.1 % steps +/- 0.5 %
-PILOT FREQUENCY: Frequency error from -99 to + 99 Hz +/- 0.5 Hz
-CARRIER DEVIATION: Digital display, + / - 9,9 KHz in 0,1 KHz steps / Error < 0,2 KHz
-STEREO LEVEL: -20 to + 5 dB L/R & L-R Mode,
user selected 2 state VU: Ballistic & Peak
-STEREO PHASE: Phase Correlation from 0 to 180 degrees. It indicates the true
stereo sensation the audience is hearing. Analog Vectorscope and Digital mode.
MONO & INVERSE phase
-RADIATED POWER: Relative radiated power, measured from 0 to 5;
indicates the increase at the RF power due to the 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
-NOISE: L & R noise level; -40 to -90 dBA, +/- 3 dB; 20-10 KHz, «A» weighted.
Automatic measure using brief samples of the 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 music with Pot-Pan effects
or using on-air a short arpeggio with pan-pot
-HARMONIC DISTORTION: 0.02 % to 5 %. It measures 2nd and even harmonic
distortion due to the FM modulation process. 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 (only one spot each hour is
enough).The spots are provided with the VA-16 (WAV files).
-SPECTRUM ANALYZER: Selectable frequency span, from +/- 250 KHz
to +/- 1 mHz in 25, 50 and 100KHz steps.
Bandwidth is 10 KHz. Measure range = 50 dB, +/- 3 dB.
-MODULATION BANDWIDTH: Graph of % MOD from zero to +/- 150 KHz,
BW of measure = 10 KHz
-SCANNER: Frequency scan of all the odd and even FM band channels,
from 87.5 to 108 MHz in 100 kHz or 50 kHz steps
DIMENSIONS: 19" rack mount. Module one (44,4 mm) Weight: 6 Kg
100 V - 240V ( user selectable) 50/60 Hz, Or Ni-Cad battery in models /P
PRINTED RECORDS OF ON-AIR PERFORMANCE
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:
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 over modulation.
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.
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
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.
Idem model RK, PC operated or stand-alone unit. With 2 x 40 back lighted
Portable model, with carrying bag and whip antenna.. Internal Battery;
4 hours 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