Equipment information
Neutrik Cortex Instruments A1 Test Set
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Model:
A1
Date:
1998
Category:
Group:
Description:
Audio Test & Service System
Information
Brief Overview on the A1
The NEUTRIK A1 is a flexible, powerful, accurate and
easy-to-use audio
measurement system. It measures
• Level (absolute) in μV, mV, V, dBV and dBu or dBm
• Level relative in *1, % and dBr
• Total harmonic distortion & noise (THD+N) in % and dB
• Wow and Flutter in %
• Noise (absolute) in μVq, mVq, Vq and dBq
• Noise relative in *1, % and dBr
• Crosstalk (absolute) in μV, mV, V, dBV and dBu or dBm
• Crosstalk (relative) in *1, % and dBr
• Frequency in Hz
• Phase in the range of ±180° degree (available with
installed AO2 option only)
Results are shown on a large, backlit graphics LC-display.
Individual measurement
results are displayed in digits, while sweeps are shown
graphically.
Another, very powerful diagnostic aid of the A1 is the SCOPE
mode, that displays
the waveform of the input signal on the LCD just like on a
conventional Oscilloscope.
In the THD+N function, the original input signal and the
distortion residual are shown
as two traces. In other functions, the measured signal is
shown as a single trace.
The contents of the display can be printed out at any time
to an ordinary dot-matrix
printer to provide hardcopies e.g. of frequency responses or
signal waveforms.
All measurements - except noise - are made after true RMS
conversion of the input
signal. Noise is quasi-peak measured according to CCIR
468-3. Both a 400 Hz high-
pass and a 22Hz-22kHz band-pass Filter are available as a
standard.
The two inputs of the A1 are DC-isolated to ±100V, and
equipped with bothstandard input impedances of 100kΩ and a
Phantom Power supply.
A small, built-in loudspeaker allows acoustical monitoring
of the input signal.
The internal Oscillator may generate sine or square signals
from 20Hz to 40kHz, and
is able to sweep in coarse or fine steps. Its 0Ω output
impedance makes it suitable
for feeding even loudspeakers directly.
Sweep ability is available for Level, THD+N, Noise,
Crosstalk, Phase and Relative
Level functions. Sweeps can be controlled from the built-in
Generator or from
external sources (e.g. test tapes, test CDs, or remote A1s
at other locations).
Manual Type:
User Manual
Pages:
61
Size:
1.20 Mbytes (1262516 Bytes)
Language:
english
Revision:
Manual-ID:
Date:
1998 03 01
Quality:
Electronic document, no scan, very well readable.
Upload date:
2017 12 17
MD5:
942099ec342f431f530a72dad00f82ad
Downloads:
706
Information
INTRODUCTION ...
9
Important User Information
... How
to Use this Manual
... Brief
Overview on the A1
... INSTALLATION
...
11
Inventory
...
11
Options & Accessories
... 11
Power
Connection ...
12
Printer Connection
...
12
INPUT & MONITOR CONNECTORS
...
13
Input Wiring of Phantom Supply
...
13
Selectable Input
Impedances ...
13
Balanced Signals
... 14
Unbalanced Signals
... 14
Monitor Outputs
...
15
THE Generator
...
16
Setting The Generator
...
16
Generator Frequency
... 17
Generator Level
... 17
Channel
Muting ...
18
Generator Overload
...
18
DISPLAY M ODES
...
19
METER Mode
...
19
The Generator Settings
... 19
The Measurement Results
... 19
Unit
Selection ... 20
Analog Bargraph
... 20
Change the Bargraph Sensitivity
... 20
The INPUT
Display ... 21
GRAPH Mode
...
21
Cursor Function in Graph
... 22
Y-Scaling
... 22
X-Scaling ... 23
SCOPE Mode
...
24
THE A NALYZER
...
27
LEVEL Function
...
27
Filters
... 27
LEVEL REL Function
...
28
THD+N Function
...
29
Filters
... 29
External
Synchronization ... 29
NOISE Function
...
30
Noise Weighting Filter
... 30
NOISE REL Function
...
31
CROSSTALK Function
...
32
Crosstalk (Absolute)
... 32
Crosstalk (Relative)
... 32
WOW & FLUTTER
Function ...
33
Setting the W&F
Standards ... 33
Wow & Flutter Measurements (Replay Only)
... 33
Wow & Flutter Measurements (Record to Replay)
... 34
Wow & Flutter Analysis
... 34
PHASE Function
...
35
S WEEPS
...
37
Frequency Response Sweeps
...
37
Y-Scaling &
Units ...
38
Sweeps in Other
Functions ...
39
Cursor
...
39
X-Rescaling
...
39
External Sweeps
...
40
Preparing an External
Sweep ... 40
Tape Sweeps
...
41
P RINTOUTS
...
43
Printer Driver
Selection ...
43
Examples of Printer Settings
... 43
HP Thinkjet
... 43
Epson FX80, IBM Proprinter
XL ... 43
Printer Errors
... 43
FRONTPANEL SETUP
...
45
A PPENDIX
...
47
DIP Switch Settings
...
47
W&F Selection
... 47
Front Panel Setup
... 47
Printer
Settings ... 47
Overview
... 47
Centronics
Interface ...
48
Pin Assignment
... 48
Timing Diagram
... 48
RS232 Interface
...
48
Pin Assignment
... 49
Cables
... 49
MD9 female to MD9 female
... 49
MD9 female to MD25
female ... 49
MD9 Female to MD25
Male ... 50
TECHNICAL SPECIFICATIONS
...
51
Generator ...
51
Sweep Function
...
51
Analyzer ...
51
LEVEL Function
... 51
CROSSTALK and LEVEL SELECTIVE Function
... 51
NOISE Function
... 52
THD + N
Function ... 52
WOW & FLUTTER Function and DRIFT
... 52
Drift
Measurement ... 52
PHASE Function (Option)
... 52
Frequency
Measurement ... 52
SCOPE function
... 53
Filters
... 53
Display
...
53
Display
Modes ... 53
Interfaces
...
53
General Data
...
53
NEUTRIK DISTRIBUTORS
...
55
INDEX
...
59