User`s Manual(current)
Contents
1. R12 50k ohm Pot AMPLITUDE2. ADJUSTMENT To adjust for minimum distortion connect the scope probe to the triangle sine wave output Close S2 toggle switch for sine wave output and 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 1s less than 1 from 1Hz to 1OkHz and less than 3 over the 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 configuration of S2 toggle switch refer to our website with the part number 22833 and for the S1 rotary switch pin configuration refer to our website with the part number 101574 Part Number 20685 FUNCTION 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 that products purchased will suit customer s particular purpose Customer must rely on customer s own skill or judgment in selecting suitable products for customer To the extent any implied warranty is applicable such warranty shall be limited to 90 days from the date of
3. Jameco Part Number 20685 JE2206 Function Generator Kit GENERAL DESCRIPTION The 20685 JE2206 Function Generator Kit 1s 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 frequency modulated The kit is intended to be incorporated into a higher assembly of the user s own design that adds power supply controls and housing e Operating from either a 12VDC or 6VDC 15mA power source e Frequency capability 1 to I100KHz in 4 ranges e Frequency variability 1 100 within each range e Frequency accuracy dependent upon timing capacitors and user s potentiometer calibration by user e Sine triangle output amplitudes variable 0 to 6Vp p for sine and OV to V for triangle with 600Q source impedance e Maximum sine wave distortion 1 10 to 10kHz and 3 10 to 100kHz e Linear frequency modulation capability range dependent on center frequency e Linear amplitude modulation capability range 55dB e Other criteria as determined by Exar 2206 function generator IC Component Part Description Qty Reference Number XR2206 AXIAL 10uF 50V C3 27001 Mylar capacitor non l polarized luF 100V CK C4 26956 Mylar capacitor non l polarized 0 1uF 100V 104 C5 26884 Mylar capacitor non l polarized 0 01uF 100V 0 01 C6 26833 Mylar capacitor non l polarized 0 001uF 100V 1
4. 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 differ 1f 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 up the function generator kit will require a digital counter for frequency calibration and a general purpose oscilloscope for the calibration of sine wave output wave forms and amplitude adjust The controls 2 1 SI rotary switch external frequency range position 1 1 to 100Hz range position 2 10Hz to 1 kHz range position 3 100Hz to 10 kHz range position 4 1 kHz to 100 kHz range 2 2 S2 toggle switch external wave shape open for triangle wave closed for sine wave 2 3 R9 1M ohm potentiometer DC offset adjust for OVDC output offset voltage 2 4 R10 Ik ohm potentiometer sine wave distortion Minimizes harmonic distortion adjust with R11 25k ohm potentiometer 2 5 R11 25k ohm potentiometer sine wave symmetry optimizes symmetry Adjust with R10 1k ohm potentiometer 2 6 R12 50k ohm potentiometer panel mount external component output amplitude sets amplitude of sine wave or triangle wave output 2 7 R13 IM o
5. terminal Q between 4V about V 2 The phase of the output signal is reversed and its amplitude goes through zero at V 2 Adjust the DC offset of the sine triangle output with R9 1M ohm potentiometer Adjust for minimum sine wave distortion with R10 Ik ohm potentiometer and R11 25k ohm potentiometer alternately adjusted 10 SYNC output the sync output provides a 50 duty cycle pulse output with either full swing or upper half swing of the power supply voltage depending on the choice of sync output terminals on the printed circuit board see figures 3 and 4 11 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 be left open circuited The open circuit voltage at this terminal 1s approximately 3V above the negative supply voltage and its impedance is 1000 ohms 12 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 approaches the half of the total power supply voltage The phase of the output signal reverses as the amplitude goes through its minimum value The total dynamic range is approximately 55dB with AM control voltage of 4V referenced to the half of the total supply voltage When not in use AM terminal should be left open circuited
6. 02 orange black orange brown black yellow brown black red white brown red R5 R6 691032 1 4W Resistor 5 1k 2 BRENNEN NUN P mgetccbmen o orange black brown mo Ue mmm UU 35511 Potentiometer 25k 253 134341 22AWQ black hook up wire JE2206 1 PC Board Assembly Instructions 0706 External Components Potentiometer 50k Panel Mount Potentiometer 1M Panel Mount Rotary switch 1 layer 2P6P SPDT mini toggle switch MTS 102 F1 Recommended power supply kit if using a split power supply configuration 1 1 Jameco Part Number 20626 JE215 Adjustable power supply kit Assembly Preparation and Procedures 1 Important identify all parts on parts list 2 3 before proceeding If you are having difficulties in identifying the parts visually suggest that you use a multimeter that can measure capacitance resistance 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 actual 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 small wire cutter stripper small long nose pliers small screw driver multimeter for measuring voltage capacitance and resistance So
7. and 1M ohm Potentiometer R13 O for FREQUENCY Not Shown is 50k 2 potentiometer R12 for AMP ADJUST connection of pot to PCB depends on single 7 ie supply operation see figure 3 or split C1 P lt gt i 2 P supply see figure 4 S D E JJ E z DC OFFSET i SCHEMATIC AA z B GRND R2 100k T Id v Q 1 16 WN 3 H11 25k POT 8 S2 TRI SINE WAVE ES R10 1k POT e 3 14 AAA e lr ae R8 300 ohms T O e r 4 j 1 13 C V C 5 XR2206 12 6 11 o M SYNC OUTPUT 7 FULL SWING 7 10 a C7 10uF 50V ios NC 8 9 NC 1 D C3 1uF f pf NN V S i ma i o R5 5 1k L SYNC OUTPUT D C4 0 tuF oc i HALF SWING F C5 0 01uF H 3 9 9 S1 5 e C6 0 001UF d SN R13 1M FREQUENCY RANGE e j Sweep Input J K V FREQUENCY Scanned Picture of Printed Circuit Board Figure 1 m e PI mis nd 1 ks 1 e ba porsi so t wend ye a wp dr sind i ml a tg ote pied ae Ai iva 0 nis uem cbr mr n aie gp ro Ree Ne 4 heat cape pat ro mdp BL VM TE i ee em et ie Feico Ress w 3 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 R10 potentiometer making note of pin
8. hm potentiometer panel mount external component frequency varies frequency of output signal approximately 1 100 on each range Capacitors C3 C4 C5 and C6 are 5 mylar capacitors as supplied For more accurate matching of potentiometer dial calibration between ranges and or for greater stability the user may substitute other capacitors of the same nominal capacitances PRECAUTION keep the lead length short for the range selector switch S1 rotary switch The JE2206 function generator kit is designed for 12V or 6V operation but will operate up to a maximum of 26V or 13V Whatever supply is used take care to observe correct polarity as 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 600 ohms The square wave SYNC outputs are derived from a grounded emitter transistor collector connecting within the IC to terminal M Sync current at this terminal should not exceed that which will pull the LOW voltage higher than 0 5V above ground 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 Hz V where C is the particular timing capacitor connected to S Linear amplitude modulation will occur for input voltages at
9. layout You may have to spread pins to match hole spacing 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 JE 2206C REV E 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 Adjustment knob of R11 should be aligned to small rectangular shape H9 potentiometer making note of pin layout You may have to spread pins to match hole spacing SYNC OUTPUT FULL SWING S2 Switch for TRI SINE WAVE SYNC OUTPUT HALF SWING 233 TIKI E2604 Signal Output a Frequency Sweep Input 1M OHM R13 POTENTIOMETER FREQ ADJUST Amplitude Modulation Input ant 4 Connections for Single Supply Operation Figure 3 Rotary Switch S1 for Frequency Range Selection LJ t t 295 dca EE rta T1 N EA D T begs FOG bs Te 12V GROUND Solder wire across node A and node above A 50k Potentiometer R12 AMP ADJUST Connections for Split Power Supply Operation SYNC OUT HALF SWING Figure 4 R13 1M ohm POT FREQ S1 rotary switch SYNC OUT FULL Frequency Range SWING p nS AS A ameco yt L oe ABAD V 46V V 6V S2 TRI SINE WAVE OUTPUT AM INPUT
10. ldering Tips 1 2 3 4 Feed the solder to the crack between the iron tip and the solder pad next to the component lead Leaving the iron tip too long on a pad will cause the pad to life as well as damage the component Allow approximately 2 seconds per solder joint Using too much solder can cause the solder to bridge across traces and pads Keep iron tip clean by wiping iron across water dampened sponge frequently Assembly Instructions READ ALL INSTRUCTIONS BEFORE STARTING Before assembly determine if a split power supply or a single power supply will be used as placement of R12 potentiometer will change with an addition of a jumper wire across the output voltage nodes please see figure 3 for single power supply and figure 4 for split power supply Printed wiring board assembly 1 2 3 4 5 6 Start the board assembly by placing the printed circuit board to the position shown on figure 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 1n the parts list for each resistor If uncertain measure the resistors with your multimeter and label them accordingly Bend the leads at the bottom of the PCB board to contain the resistors solder and clip excess leads Insert IC into board Be sure that the notch at the end of the IC 1s located properly as shown for pin number 1 identification
11. purchase Limitation of liability Jameco s liability shall be limited to the repair or replacement of defective 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 sale of merchandise including any failure to deliver any merchandise or arising out of customer s installation or use whether proper or improper 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 date 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 warranty for repair or replacement There is not charge for any replacement Equipment or parts which have been subject to abuse misuse accident alteration neglect 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 Q AM INPUT I i T F output Schematic Diagram with External Rotary Switch S1 for Frequency Range Selection 4 SPDT switch S2 for TRI SINE Wave A V selection
12. see figure 2 Insert potentiometers adjustable resistors 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 adjustment knob aligned to 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 Bend leads at the bottom of the PCB to contain capacitors solder and clip excess leads Insert capacitors C3 C4 C5 and Co The capacitance values are marked on the components as shown in parenthesis see parts list C3 luF 1K C4 0 1uF 104 C5 0 01uF 01 C6 0 001uF 102 if uncertain use your multimeter to measure capacitance and label accordingly Bend leads at the bottom of the PCB to contain capacitors solder and clip excess leads Final Assembly Checkout Do not attempt to apply power to the board until a final check has been made to verify correctness of all assembled components Component IC1 will be damaged if placed incorrectly Board will malfunction if capacitors C1 C2 and C7 are not properly placed on the PCB for polarity Capacitors will be damaged after short usage Erratic signal patterns will result from incorrect placement of resistors Operational Considerations 1 The schematic diagram see schematic shows the components supplied with the JE2206 Jameco
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