Atec Rohde-Schwarz-UPL - Manual (Page 22)

22 Audio Analyzer UPL
Display of results
Units
Level (analog)
V, dBu, dBV, W, dBm,
difference (
∆ ), deviation ( ∆ %) and
ratio (without dimension, %, dBr)
to reference value
Level (digital) FS, %FS, dBFS, LSBs
deviation (
∆ %) or ratio (dBr)
to reference value
Distortion % or dB, referred to signal amplitude,
THD and THD+N in all available level
units (absolute or relative to selectable
reference value)
Frequency Hz, difference ( ∆ ), deviation ( ∆ %) and
ratio (as quotient f/f
ref
, 1/3 octave,
octave or decade) to reference value
(entered or stored, current generator
frequency)
Phase ° , rad, difference ( ∆ ) to reference value
(entered or stored)
Reference value (level):
Fixed value (entered or stored).
Current value of a channel or generator signal: permits direct measurement of
gain, linearity, channel difference, crosstalk. In sweep mode, traces (other
trace or loaded from file) can be used as a reference too.
Graphical display of results
Monitor (not UPL66)
8.4“ LCD, colour
Display modes – display of any sweep trace
– display of trace groups
– bargraph display with
min./max. values
– spectrum, also as waterfall display
– list of results
– bar charts for THD and
intermodulation measurements
Display functions – autoscale
– X-axis zoom
– full-screen and part-screen mode
– 2 vertical,1 horizontal cursor line
– search function for max. values
– marker for harmonics (spectrum)
– user-labelling for graphs
– change of unit and scale also
possible for loaded traces
Test reports
Functions
– screen copy to printer, plotter or file
(PCX, HPGL, Postscript)
– lists of results
– sweep lists
– tolerance curves
– list of out-of-tolerance values
– equalizer traces
Printer driver supplied for approx. 130 printers
Plotter language HP-GL
Interfaces 2 x RS-232-C, Centronics,
IEC 625 (option UPL-B4)
Storage functions – instrument settings, optionally with
measured values and curves
– spectra
– sweep results
– sweep lists
– tolerance curves
– equalizer traces
Remote control via IEC 625-2 (IEEE 488) and RS-232;
commands largely to SCPI
(option UPL-B4)
Audio monitor (option UPL-B5)
Headphones connector 6.3 mm jack
Output voltage (U
P
) max. 8 V
Output current (I
P
) max. 50 mA
Source impedance 10 Ω , short-circuit-proof
Recommended headphone impedance 600 Ω
Extended analysis functions (option UPL-B6)
Coherence and transfer functions can be displayed simultaneously
Frequency range DC to 21.9 kHz
Frequency resolution from 5.86 Hz
Averaging 2 to 2048
FFT length 256, 512, 1k, 2k, 4k, 8k points
Rub & buzz measurement simultaneous measurement of frequency
response, rub & buzz and polarity
1)
Frequency range 10 Hz to 110 kHz
Tracking highpass filter 2 to 20 times fundamental
Lower/upper frequency limit selectable
Measurement time
(200 Hz to 20 kHz, 200 points log.) 2 s
Multi-sine generator function extended functions
Mode 1 crest factor or phase of each
component selectable
Mode 2 crest factor selectable
Third octave analysis for analyzer ANLG 22 kHz
and digital 48 kHz
Number of third octaves 30
Frequency range 22 Hz to 22 kHz
Level accuracy
Center frequency ± 0.2 dB
22 Hz to 22 kHz ± 1.0 dB (IEC 1260, class 0)
Stereo sine in digital generator only
Frequency range 2 Hz 2) to 21.9 kHz
Frequency adjustable for each channel
Phase 0 to 360° (same frequency in both
channels)
Level adjustable for each channel or
channel ratio 2/1
Sweep parameters frequency and level of channel 1
Other functions under development
Hearing aids test accessories (option UPL-B7)
Consisting of acoustic test chamber, acoustic 2 cm³ coupler, various battery
adapters, connecting cables, software for measurements to IEC60118 and
ANSI S3.22
Additionally required
options UPL-B5 and UPL-B10
Modification UPL-U3
Change of source impedance of analog generator to 150 Ω (instead of 200 Ω
set as standard) at the factory
1) With UPL-B29 only in base rate mode.
2) Fixed frequency independent of clock rate.