Rolls MO2020 Users Manual
DC IN
DC
LOOP
SQR OUT
SINE OUT
MO2020
-
+
12 - 16 VDC
MO2020
TESTOSCILLATOR
SINE/SQUARE WAVE GENERATOR
-10 dB
NORMAL
+7
SQR LEVELSINE LEVEL
+5
10K
3K
1K
500
FREQUENCY
250
+14
dB
-OO
+11
dB
-OO
PWR
Owners Manual
24K
Hz
20
100
TESTOSCILLATOR
1.2 - 5 VDC
VCO INPUT
Signal Generator
TESTOSCILLATOR
LIMITED WARRANTY
be free from defects in materials and workmanship under normal installation, use and service for a period of one (1) year from the date of purchase
as shown on the purchaser’s receipt.
limited to repair or replacement (at our option), during the warranty period
of any part which proves defective in material or workmanship under
normal installation, use and service, provided the product is returned to
Rolls Corporation, TRANSPORTATION CHARGES PREPAID. Products
returned to us or to an authorized Service Center must be accompanied by
a copy of the purchase receipt. In the absence of such purchase receipt, the
warranty period shall be one (1) year from the date of manufacture.
result of defacement, misuse, abuse, neglect, accident, destruction or
alteration of the serial number, improper electrical voltages or currents,
repair, alteration or maintenance by any person or party other than our
own service facility or an authorized Service Center, or any use violative
of instructions furnished by us.
obligations or liabilities. ANY IMPLIED WARRANTIES, OBLIGATIONS, OR LIABILITIES, INCLUDING BUT NOT LIMITED TO THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, SHALL BE LIMITED IN DURATION TO THE ONE YEAR DURATION OF THIS WRITTEN LIMITED
WARRANTY. Some states do not allow limitations on how long an
implied warranty lasts, so the above limitation may not apply to you.
CIAL, INCIDENT AL OR CONSEQUENTIAL DAMAGES FOR
BREACH OF THIS OR ANY OTHER WARRANTY, EXPRESSED OR
IMPLIED, WHATSOEVER. Some states do not allow the exclusion or
limitation of special, incidental or consequential damages so the above
limitation or exclusion may not apply to you. This warranty gives you
specific legal rights, and you may also have other rights which vary from
state to state.
This product is warranted to the original consumer purchaser to
The obligation of Rolls Corporation under this warranty shall be
This warranty shall be invalid if the product is damaged as a
This one-year warranty is in lieu of all expressed warranties,
IN NO EVENT SHALL WE BE LIABLE FOR ANY SPE-
PAD
PAD
OUTPUT
MO2020
MO2020 TEST OSCILLA T OR
The MO2020 is a signal generator for electronic testing in the audio frequency range. It
has a 1/4" unbalanced sine wave output, and a
1/4" unbalanced square wave output. For
external control or sweeping of the frequency
range, a 1/4" VCO input is provided to receive
1.2 to 5 volts dc.
• Freququency range from 20Hz to 24kHz
• 1/4" unbalanced Outputs
• Sine and Square wave outputs
• -10 dB pad for referencing
• Power Loop-Through for connection to additional unit
Salt Lake City, Utah
8/99
INTRODUCTION
Thank you for y our purchase of the MO2020 Testoscillator. The MO2020
is designed to provide a sine wav e, or square w a ve via 1/4" unbalanced
jacks, for testing audio devices. The units frequency output varies from
20Hz to 24kHz.
DESCRIPTION
FRONT PANEL
Output Pad: When depressed, the output level is dropped by 10 dB.
Frequency: V aries the frequency generated b y the MO2020 from 20Hz to
24kHz. PLEASE NOTE: THE FREQUENCY MARKINGS ON THE
MO2020 ARE APPROXIMA TE AND MAY VARY. FOR ACCURA TE FREQUENCY SELECTION, USE A RELIABLE FREQUENCY COUNTER.
Sine Level: Controls the output lev el of the Sine Out jac k.
SQR Level: Controls the output level of the SQR (square) Out jack.
REAR PANEL (Labeling for the rear panel is located on the top of the unit)
VCO Input: 1/4" jac k f or connection to a Voltage Control source which
may vary from 1.2 volts to 5 volts dc. This voltage allows for external
control of the MO2020's frequency. THE FREQUENCY CONTROL MUST
BE SET TO MAXIMUM FOR PROPER OPERATION OF THE VCO
CONTROL.
Sine Out: 1/4" unbalanced jac k containing the sine wave signal.
SQR Out: 1/4" unbalanced jac k containing the square wave signal.
DC Loop: Paralleled pow er jack f or connection to another MO2020.
DC In: For connection to the included Rolls power supply.
VCO INPUT
1.2 - 5 VDC
SINE OUT
SQR OUT
DC
LOOP
12 - 16 VDC
DC IN
+
-
MO2020
TESTOSCILLATOR
SINE/SQUARE WAVE GENERATOR
PAD
-10 dB
NORMAL
OUTPUT
PAD
MO2020
FREQUENCY
500
250
100
20
TESTOSCILLATOR
1K
3K
10K
Hz
24K
PWR
-OO
SQR LEVELSINE LEVEL
+11
+7
dB
+14
-OO
+5
dB
SPECIFICATIONS
Output Lev el: +11 dB Sine
+14 dB Square
Output Impedance: 100 Ω
THD (Sine): <1%
Size: 4.25" x 3.75" x 1.75"
P o w er: 12 - 16 Volts DC 50 mA
SCHEMATIC
S I N E O U T
P 5
P 1 0 0 K
S I N E L E V E L
R 1 2
4 . 7 K
R 1 4
1 0 0 K
9
10
15
U 4 B
14
13
L M 1 3 6 0 0
R 1 3
1 0 0 K
1 0 0 K
R 1 5
8
7
2
11
U 4 A
VCC
3
4
L M 1 3 6 0 0
R 1 9
1 0 0 K
R 1 8
1 0 0 K
9
10
15
U 1 B
14
13
L M 1 3 6 0 0
R 2 2
1 0 K
VCC
8
7
L M 1 3 6 0 0
2
11
U 1 A
3
4
C 6
C 3
R 1 1
1 0 K
R 1 0
1 0 K
6 8 U F T A N T
8 2 0 P F
12
16
6
C 2
5
1
C 1
12
16
6
5
1
R 2
R 3 2
3 . 3 K
R 7
3 3 0
3 3 0
R R 8
8 2 0 P F
R 2 1
3 . 3 K
R 6
3 3 0
R 5
8 2 0 P F
R 9
3 . 3 K
R 3
3 0
3 3 0
R 2 0
1 2 K
VCC
R 1
3 3 0
3 3 0
5 0 P F
C 4
R 2 5 4 . 7 K
C 2 1
1 U
P 3
5 0 K
J 2
P H O N E 1 / 4
J 4
P H O N E 1 / 4
0 / - 1 0
S W 1 A
D P D T
123
4 7 0
R 2 9
C 2 3
4 7 U
1
4 5 6 0
1 0 K
U 3 A
R 2 4
2
3
R 2 7
1 0 0 K
P 2
W 1 0 0 K
F R E Q U E N C YL O T R I M
VCC
D 2
R 3 1
1 K
1 . 2 - 5 V C O N T R O L
1 K
R 3 0
R 2 6
3 . 3 K
VCC
1 N 7 5 1 A
R 2 8
6 . 8 K
R 2 6 B
C 7
1 0 U
4
R 3 3
4 5 6 0
8
VCC
4 5 6 0
8
VCC
6
D 3
L D R G
1 0 K
A
1
Rev.
122-Apr-1999
S Q U A R E O U T
J 3
P H O N E 1 / 4
1 2 0 P F
C 5
ROLLS CORPORATION
R 2 3
1 K
1 0 0 K
7
U 5 B
6
5
P 4
S Q U A R E L E V E L
P 1 0 0 K
7
U 3 B
5
1
4 5 6 0
4
U 5 A
2
3
C 8
1 U
U 2
7 8 1 2
D 1
1 N 4 0 0 1
J 1
1 2 T O 1 8 V D C
3
O
I
1
231
C 1 0
R 1 7
4 7 K
R 1 6
4 7 K
G
2
C 9
1 K U F
231
J A P D C
J 5
M O 2 0 2 0 .S C H
5143 South Main Street
Salt Lake City, UT 84107
Document Number:
Ba
Testoscillator MO2020
Size
4 7 U
J A P D C
Date: Sheet of
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