Jameco BenchPro JE2206 User manual

Jameco Part Number 20685
(JE2206)
Function Generator Kit
y modulated. The
it is intended to be incorporated into a higher
sembly of the user's own design that adds power
sup ,
•ng from either a +12VDC or +/-
•ncy capability: +1 to 100KHz in 4
•
ter
+/- for
•to
•ncy modulation capability
•lation capability,
er determined by Exar 2206
functi erato
Component
Part er tion Qty.
GENERAL DESCRIPTION
The 20685 (JE2206 Function Generator Kit) is a
single-board assembly incorporating the basic
circuit necessary for a sine, square, and triangle
wave generator, of high stability and accuracy that
may be amplitude and frequenc
k
as ply controls, and housing.
Operati
6VDC @ 15mA power source
Freque
ranges
Frequency variability: 1:100 within each
range
•Frequency accuracy dependent upon
timing capacitors and user's potentiome
(calibration by user)
•Sine / triangle output amplitudes variable,
0 to 6Vp-p for sine and 0V to V
triangle, with 600Ωsource impedance
Maximum sine wave distortion: 1% 10
10kHz; and 3% 10 to 100kHz
Linear freque
range dependent on center frequency
Linear amplitude modu
range
•Oth 55dB criteria as
on gen r IC
Descrip
Reference Numb
IC1 34972 IC Function Generator
XR2206 1
C1, C2, C7 10882 3Electrolytic Capacitor,
AXIAL, 10uF @ 50V
C3 27001 Mylar capacitor, non-
polarized, 1uF @ 100V
(1K)
1
C4 26956 Mylar capacitor, non-
polarized, 0.1uF @
100V (104)
1
C5 26884 Mylar capacitor, non-
polarized, 0.01uF @
100V (0.01)
1
C6 26833 Mylar capacitor, non-polarized, 0.001uF @
100V (102)
1
R1 691219 1/4W Resistor, 30k
(orange-black-orang
e) 1
R2 691340 1/4W Resistor, 100k
(brown-black-yellow) 1
R3, R7 690865 1/4W Resistor, 1k
(brown-black-red) 2
R4 691091 1/4W Resistor, 9.1k
(white-brown-red) 1
R5, R6 691032 1/4W Resistor, 5.1k
(green-brown-red) 2
R8 690734
1/4W Resistor, 300Ω
(orange-black-brown) 1
R9 42981 Potentiometer, 1M (105) 1
R10 42964 Potentiometer, 1k (102) 1
R11 )35511 Potentiometer, 25k (253 1
134341 22AWG black hook up
wire 1
2278583 JE2206-1 PC Board 1
Assembly Instructions 1
External Com tsponen
R12 l255434 Potentiometer, 50k Pane
Mount 1
R13 255469 Potentiometer, 1M Panel
Mount 1
S1 101574 2P6P 1Rotary switch, 1 layer,
S2 22833 SPDT mini toggle 1
switch, MTS-102-F1
Recommended power supply kit if using
split power supply configuration: a
5) -Jameco Part Number 20626 (JE21
djustable power supply kit.A

Ass
1) ts list
ltimeter
ure capacitance, resistance,
2)
ual
3)
mall
liers;
driver; multimeter for
measuring voltage, capacitance, and
.
Sol
1) the crack between the
2) d will
ell as damage the
4) Keep iron tip clean by wiping iron across
water dampened sponge -- frequently.
EAD ALL INSTRUCTIONS BEFORE
embly Preparation and Procedures:
Important:identify all parts on par
before proceeding. If you are having
difficulties in identifying the parts
visually, suggest that you use a mu
that can meas
voltage. Measure the components
accordingly.
Suggestion:simulate board assembly by
placing the components in their actual
place on the picture assembly, then
transfer the components to the act
board for soldering assembly. (see figure
1 for scanned board assembly)
Tools required:small soldering iron 27W
to 35W; resin core solder (0.03" diameter
with SN60 or SN63); small sponge (water
dampened) for cleaning solder tip; s
wire cutter/stripper; small long nose p
small screw
resistance
dering Tips:
Feed the solder to
iron tip and the solder pad next to the
component lead.
Leaving the iron tip too long on a pa
cause the pad to life, as w
component. Allow approximately 2
seconds per solder joint.
3) Using too much solder can cause the
solder to bridge across traces and pads.
Assembly Instructions:
R
STARTING!!!
Before assembly, determine if a split power supply
or a single power supply will be used, as
placement of R12 potentiometer will change (
an addition of a jumper wire across the output
with
oltage nodes - please see figure 3 for single
lit power supply.
Pri
1) by placing the
wn
2)
he bottom of the PCB
d
3) e
ocated
4) sistors)
).
djustment knob aligned to
5)
d leads at the bottom of the PCB to
6)
v
power supply and figure 4 for sp
nted wiring board assembly
Start the board assembly
printed circuit board to the position sho
on figure 1 and figure 2
Insert resistors R1 through R8 into the
board. Observe the color code of each
resistor as you install them (color code is
stated in the parts list for each resistor. If
uncertain, measure the resistors with your
multimeter and label them accordingly).
Bend the leads at t
board to contain the resistors, solder an
clip excess leads.
Insert IC1 into board. Be sure that th
notch at the end of the IC is l
properly as shown for pin number 1
identification (see figure 2).
Insert potentiometers (adjustable re
R9, R10, and R11 as shown (see figure 2
Resistors R9 and R10 will require
spreading of the leads to match the hole
spacing on the board. R11 requires
matching the a
the small rectangular shape (see figure 2).
Solder leads.
Insert capacitors C1, C2, and C7 into the
board. Note that the leads are polarized
and must be placed as shown (see figure
2). Ben
contain capacitors, solder, and clip excess
leads.
Insert capacitors C3, C4, C5, and C6. The
capacitance values are marked on the

components as shown in parenthesis ( see
parts list) C3 = 1uF (1K); C4 = 0.1uF
(104); C5 = 0.01uF (.01); C6 =
(102) if uncertain use your multimeter to
measure capacitance and label
accordingly). Bend
0.001uF
leads at the bottom of
the PCB to contain capacitors, solder, and
a
s of
ill ot
ged after short usage.
rratic signal patterns will result from incorrect
lacement of resistors.
Operationa
1.
ameco
ffer if
p the
a
e calibration of
sine wave output wave forms and
st.
2.
tion 3 - 100Hz to
0 kHz range; position 4: 1 kHz to
2.2
wave shape - open for triangle
2.3 eter)
DC offset, adjust for 0VDC
2.4 meter)
distortion, adjust with R11
2.5
y,
etry. Adjust
with R10 (1k ohm
2.6
plitude,
sets amplitude of sine wave or
2.7
cy of output signal
approximately 1:100 on each
3. 6 are
clip excess leads.
Final Assembly Checkout:
Do not attempt to apply power to the board until
final check has been made to verify correctnes
all assembled components. Component IC1 will
be damaged if placed incorrectly. Board w
malfunction if capacitors C1, C2, and C7 are n
properly placed on the PCB for polarity.
Capacitors will be dama
E
p
l Considerations:
The schematic diagram (see
schematic) shows the components
supplied with the JE2206 (J
Part Number 20685) and noted on
the same page the external
components such as R13 (1M ohm)
potentiometer for frequency
adjustment, S1 (rotary switch) for
frequency range selection), S2
(toggle switch) for wave selection,
and R12 (50k) potentiometer for
amplitude (connection will di
using a single supply operation -
see figure 3 and split supply
operation - see figure 4). Other
components such as power supply
and enclosure are to be supplied by
the user. In addition, setting u
function generator kit will require
digital counter for frequency
calibration and a general purpose
oscilloscope for th
amplitude adju
The controls:
2.1 S1 (rotary switch external-
frequency range) position 1: 1 to
100Hz range; position 2: 10Hz to 1
kHz range; posi
1
100 kHz range
S2 (toggle switch external)
wave; closed for sine wave
R9 (1M ohm potentiom
output-offset voltage
R10 (1k ohm potentio
sine wave distortion.
Minimizes harmonic
(25k ohm potentiometer)
R11 (25k ohm potentiometer)
sine wave symmetr
optimizes symm
potentiometer)
R12 (50k ohm potentiometer,
panel mount external
component) output am
triangle wave output
R13 (1M ohm potentiometer
panel mount external
component) frequency, varies
frequen
range
Capacitors C3, C4, C5, and C
+/-5% mylar capacitors as

supplied. For more accurate
matching of potentiometer dial-
calibration between ranges, and/o
for greater stability, the user r may
4. lead
5.
6V
rve correct polarity as
6.
0C)
C
ound.
7.
Hz/V
8.
minal
e
nal is
9. sine /
tentiometer)
er)
10. e
e
tput terminals on
11.
e left
uit
e
12.
es
ude
e.
to
tage.
When not in use, AM terminal
uld be left open-circuited
t and
substitute other capacitors of the
same nominal capacitances.
PRECAUTION: keep the
length short for the range selector
switch (S1 rotary switch)
The JE2206 (function generator
kit) is designed for 12V or +/-
operation but will operate up to a
maximum of 26V or +/-13V.
Whatever supply is used, take care
to obse
otherwise, damage to the IC may
result
The sine / triangle output (terminal
P) amplitude is varied by R12
(50k potentiometer panel mount).
The output impedance is 60
ohms. The square wave (SYN
outputs are derived from a
grounded-emitter transistor
collector connecting within the I
to terminal M. Sync-current at this
terminal should not exceed that
which will pull the LOW voltage
higher than 0.5V above gr
Applied voltage at terminal I for
the purpose of frequency
modulation or sweeping should be
limited to a maximum of +/-3V
about the open-circuit potential of
+3V. The voltage-to-frequency
factor is about 0.00032/CuF
where C is the particular timing
capacitor connected to S!.
Linear amplitude modulation will
occur for input voltages at ter
Q between +/-4V about V+/2. Th
phase of the output sig
reversed and its amplitude goes
through zero at V+/2
Adjust the DC offset of the
triangle output with R9 (1M ohm
potentiometer). Adjust for
minimum sine-wave distortion
with R10 (1k ohm po
and R11 (25k ohm potentiomet
alternately adjusted
SYNC output: the sync output
provides a 50% duty cycle puls
output with either full swing or
upper half swing of the power
supply voltage depending on th
choice of sync ou
the printed circuit board ( see
figures 3 and 4 )
Frequency Modulation (external
sweep): frequency can be
modulated or swept by applying an
external control voltage to sweep
terminal (terminal I). When not in
use, this terminal should b
open-circuited. The open circ
voltage at this terminal is
approximately 3V above th
negative supply voltage and its
impedance is 1000 ohms.
Amplitude Modulation (AM): the
output amplitude varies linearly
with modulation voltage applied to
AM input (terminal Q). The output
amplitude reaches its minimum as
the AM control voltage approach
the half of the total power supply
voltage. The phase of the output
signal reverses as the amplit
goes through its minimum valu
The total dynamic range is
approximately 55dB with AM
control voltage of 4V referenced
the half of the total supply vol
sho
ADJUSTMENT
To adjust for minimum distortion, connect the
scope probe to the triangle / sine wave output.
Close S2 (toggle switch) for sine wave outpu

adjust the amplitude control to give non-clipping
maximum swing. Then adjust R10 and R11
alternately for minimum distortion by observing
the sinusoidal waveform. If a distortion meter is
available you may use it as a final check on the
setting of sine-shaping trimmers. The minimum
distortion obtained in this manner is less than 1%
om 1Hz to 10kHz and less than 3% over the
tion
he
S1 (rotary
itch) pin configuration refer to our website
ith the part number 101574.
art Number 20685 (FUNCTION
t
r
ied warranty is
pplicable such warranty shall be limited to 90
ive
le
oper,
e
arranty r
ct, and/or unauthorized repair
are not covered by the warranty. Seller shall have
the right to final determination as to existence and
cause of defect.
fr
entire frequency range.
For further information on the operation of
XR2206 IC, please refer to the datasheets found
on the webpage of Jameco Part Number 20685
(function generator kit). For pin-configura
of S2 (toggle switch) refer to our website with t
part number 22833, and for the
sw
w
P
GENERATOR KIT)
Important disclaimer: to the fullest extent
permitted by applicable law, Jameco expressly
disclaims the implied warranty of fitness for a
particular purpose. Customer should understand
that Jameco does not may any representation tha
products purchased will suit customer's particular
purpose. Customer must rely on customer's own
skill or judgment in selecting suitable products fo
customer. To the extent any impl
a
days from the date of purchase.
Limitation of liability: Jameco's liability shall be
limited to the repair or replacement of defect
products in accordance with the Jameco Limited
Warranty. Jameco shall not be liable for ay
incidental, special, or consequential damages for
breach of any warranty, expressed or implied,
directly or indirectly arising out of Jameco's sa
of merchandise, including any failure to deliver
any merchandise, or arising out of customer's
installation or use, whether proper or impr
of the product, separately or in combination with
other equipment, or from any other cause.
Warranty: Jameco warrants the equipment to be
free from defects for a period of 90 days from dat
of purchase. If found to be defective, the products
will be replaced with a new unit, not repaired. No
unites will be accepted past the 90 day w
for repair or replacement. There is not charge fo
any replacement. Equipment or parts which have
been subject to abuse, misuse, accident,
alteration, negle

IC 1
XR2206
1
2
3
4
5
6
7
8 9
10
11
12
13
14
15
16
NC NC
F (output)
O
N
S2 TRI/SINE WAVE
R8 (300 ohms)
R10 (1k POT)
I (Sweep Input) J
R3 (1k)
R4 (9.1k)
H
(S1)
1
2
3
4
D
E
F
G
C3 (1uF)
C4 (0.1uF)
C5 (0.01uF)
C6 (0.001uF)
M SYNC OUTPUT
(FULL SWING)
L SYNC OUTPUT
(HALF-SWING)
R5 (5.1k)
R6 (5.1k)
C (V+)
B (GRND)
A (V-)
C1 (10uF @ 50V) C2 (10uF @ 50V)
+
+
-
-
R9 (1M POT)
R2 (100k)
R
DC OFFSET
Q (AM INPUT)
R1 (30k)
R11 (25k POT)
R7 (1k)
K (V-)
C7 (10uF @ 50V)
+ -
R13 (1M)
FREQUENCY
FREQUENCY RANGE
Schematic Diagram with External Rotary
Switch (S1) for Frequency Range Selection,
SPDT switch (S2) for TRI/SINE Wave
selection, and 1M ohm Potentiometer (R13)
for FREQUENCY. Not Shown is 50k
potentiometer (R12) for AMP ADJUST –
connection of pot to PCB depends on single
supply operation (see figure 3) or split
supply (see figure 4)
SCHEMATIC

Scanned Picture of Printed Circuit Board
Figure 1

Take note of capacitor polarity; if
aluminum electrolytic capacitor has a
polarity indicator, arrow will point to which
side of the capacitor is negative or
positive.
Notes on Capacitor Polarity and IC pin identification
Figure 2
Take note of capacitor polarity; if
aluminum electrolytic capacitor has a
polarity indicator, arrow will point to which
side of the capacitor is negative or
positive.
Take note of capacitor polarity; if
aluminum electrolytic capacitor has a
polarity indicator, arrow will point to which
side of the capacitor is negative or
positive.
Make note of integrated
circuit before soldering into
board, notch on IC should
be aligned to the notch
indicator on the PCB board.
R10 potentiometer making note
of pin layout. You may have to
spread pins to match hole
spacing.
R9 potentiometer making note
of pin layout. You may have to
spread pins to match hole
spacing.
Adjustment knob of R11
should be aligned to small
rectangular shape.

Connections for Single Supply Operation
Figure 3
+12V
GROUND
1M OHM (R13)
POTENTIOMETER FREQ
ADJUST
50k Potentiometer
(R12) AMP ADJUST
S2 Switch for
TRI / SINE WAVE
Rotary Switch (S1) for
Frequency Range
Selection
Frequency Sweep Input
Signal Output
Amplitude Modulation
Input
SYNC OUTPUT (HALF
SWING)
SYNC OUTPUT
(FULL SWING)
Solder wire across
node A and node
above A

Connections for Split Power Supply Operation
Figure 4
R12 (50k ohm) Pot
AMPLITUDE
V+ (+6V)
V- (-6V)
S2 TRI / SINE
WAVE
SYNC OUT (FULL
SWING)
SYNC OUT (HALF SWING) R13 (1M ohm) POT
FREQ
OUTPUT AM INPUT
S1 (rotary switch)
Frequency Range