Outputs: Analog variable gain, 2 XLR-M electronically balanced
Output Impedance<150 Ohms
Max. output level:17 dBu on 600 Ohms (5.5V RMS)
Digital / Analog Interface
Amplitude Response:20 Hz - 20 kHz + 0.2 / - 2.5 dB
Signal to Noise Ratio90 dB (A wtg. / 20 Hz-20kHz)
THD+N0.03 % @ 1kHz -6 dB (VU-meter level)
Group Delay700 us
Sampling Frequency46.875 kHz
Conversion1 bit Sigma-Delta
To enter SYSTEM TEST switch ON the device keeping processed the ESC key for some seconds: then
the display will show
System Test: XXXX XX
Press a key to check
The front panel LEDs (except process Overflow) will light in sequence. To check the Process Overflow
LED feed an analog input signal to the device and raise the input volume until saturation happens.
XXXX XX will alternate the following readings:
EEPR OK/NO (OK means the EEPROM works correctly)
MDSP OK/NO (OK means the DSP memory works correctly)
During the test, it is possible to check the keyboard: pressing a key the LCD will show the key name.
MIDI TEST
Connect a 5-pole dual male MIDI cable between MIDI IN and MIDI OUT sockets; the display will show:
System Test : MIDI XX
Keyboard locked
XX will be OK in the case MIDI test is passed, NO if there is a MIDI malfunction.
Test Procedures for
CONTROL30,TERMINATOR,ALTOCOMP
Amplitude response test
On PC:
-Load file: control30_amplitude (AP Win File menu / Open / Test)
Test Connections:
-Output A of Audio Precision System TwoÆ input 1 of the device under test.
-Output B of Audio Precision System TwoÆ input 2 of the device under test.
-Output 1 of the device under test Æ A input of Audio Precision System Two.
-Output 2 of the device under test Æ B input of Audio Pre cision System Two.
On the device under test
-Turn on the power switch.
-Se t IN PUT volume to maximum.
-Se t OUTPUT volum e to maxim um.
-Push BYPASS switch (on the TERMINATOR push the UTIL key then navigate the menu up to
SYSTEM BYPASS and hit t he ENTER key)
Start the sweep (F9) and control the results (Page3-Graph)
Audio Precisi on05/2 1/02 18:35 :56
+20
+17.5
+15
+12.5
d
+10
B
V
+7.5
+5
+2.5
+0
2020k501002005001k2k5k10k
Hz
+20
+17.5
+15
+12.5
+10
+7.5
+5
+2.5
+0
d
B
V
ColorLine S tyle Thick DataAxis
Yellow Solid1Anlr.Level A Left
RedSolid2Anlr.Level B Right
BlueSolid2Anlr.AmplLeft
last.at2c
THD test
On PC:
-Load file: control30_THD (AP Win File menu / Open / Test)
Test Connections:
-Output A of Audio Precision System TwoÆ input 1 of the device under test.
-Output B of Audio Precision System TwoÆ input 2 of the device under test.
On the device under test
-Turn on the power switch.
-Se t IN PUT volume to maximum.
-Se t OUTPUT volum e to maxim um.
-Push BYPASS switch (on the TERMINATOR push the UTIL key then navigate the menu up to
SYSTEM BYPASS and hit t he ENTER key)
Start the sweep (F9) and control the results (Page3-Graph) in the following conditions:
-Output 1 of the device under test Æ A input of Audio Precision System Two.
-Output 2 of the device under test Æ B input of Audio Pre cision System Two.
Audio Precisi on05/2 1/02 18:48 :37
0.06
0.05
0.04
0.03
%
0.02
0.01
2010k501002005001k2k5k
Hz
ColorLine S tyle Thick DataAxis
Yellow Solid1An lr.THD+N Ratio Left
CyanSolid1An lr.THD+N Ratio Left
control30_THD.at2c
S/N test
On PC:
-Load file: control30_SN (APWin File menu / Open / Test)
Test Connections:
-Output A of Audio Precision System TwoÆ input 1 of the device under test.
-Output B of Audio Precision System TwoÆ input 2 of the device under test.
On the device under test
-Turn on the power switch.
-Se t OUTPUT volum e to maxim um.
- Push BYPASS switch (on the TERMINATOR push the UTIL key then navigate the menu up
to SYSTEM BYPASS and hit t he ENTER key)
-increase the INPUT level until the device’s outputs clip, and after reduce the INPUT level itself
until the outputs exit from clipping state.
Start the sweep (F9) and control the results (Page3-Graph) in the following conditions:
-Output 1 of the device under test Æ A input of Audio Precision System Two.
-Output 2 of the device under test Æ B input of Audio Pre cision System Two.
Audio Precision05/21/02 19:08:14
+20
+10
+0
-10
-20
d
-30
B
V
-40
-50
-60
-70
-80
-100+10-90-80-70-60-50-40-30-20-10+0
Color Line Style Thick DataAxis
CyanSolid1Anl r.Ampl Left
Yel low Solid2Anl r.Am pl Left
Green Solid1Anl r.Am p l Left
RedSolid2Anlr.Ampl Left
dBV
control30_SN.at2c
Dynamics test
On PC:
-Load file: control30_dyn (APWin File menu / Open / Test)
Test Connections:
-Output A of Audio Precision System TwoÆ input 1 of the device under test.
-Output B of Audio Precision System TwoÆ input 2 of the device under test.
On the device under test
-Turn on the power switch.
-Se t IN PUT volume to maximum.
-Se t OUTPUT volum e to maxim um.
- Push BYPASS switch (on the TERMINATOR push the UTIL key then navigate the menu up
to SYSTEM BYPASS and hit t he ENTER key)
Start the sweep (F9) and control the results (Page3-Graph) in the following conditions:
-Output 1 of the device under test Æ A input of Audio Precision System Two.
-Output 2 of the device under test Æ B input of Audio Pre cision System Two.
Audio Precisi on05/2 1/02 19:11:11
14
12
10
8
%
6
4
2
-0
-30-16-28-26-24-22-20-18
dBV
+20
+15
+10
+5
+0
-5
-10
d
B
V
Color Line Style Thick DataAxis
CyanSolid1A nlr.THD+N Ratio Left
Green Solid1Anlr.Level AR ight
control30_dyn.at2c
Stability test
On PC:
-Load file: control30_stability (APWin F ile menu / Open / Test)
Test Connections:
-Output A of Audio Precision System TwoÆ input 1 of the device under test.
-Output B of Audio Precision System TwoÆ input 2 of the device under test.
-Output 1 of the device under test Æ A input of Audio Precision System Two.
-Output 2 of the device under test Æ B input of Audio Pre cision System Two.
On the device under test
-Turn on the power switch.
-Turn MIX control counterclockwise (DRY).
-Se t OUTPUT volum e to maxim um.
-Set INPUT volume to zero.
-Push BYPASS switch (on the TERMINATOR push the UTIL key then navigate the menu up to
SYSTEM BYPASS and hit t he ENTER key)
-Load ROOM 1 Preset (Preset #001)
Test:
Move the input level knob from 0 to maximum 3 times and control the output waveforms:NO
PERMANENT SINE WAVEFORMS should be visible. IF PERMANENT WAVEFORMS WITH
FREQUENCY > 20kHz should become visible on whatever output channel, THE UNIT IS TO
BE INSPECTED.