Escort EGC-3236A User manual

Escort EGC-3236A
Sweep Function Generator
User Manual

Contents
Western Australia
Unit 2/17 Casino Street,
Welshpool, WA 6016
P: [phone]
F: [phone]
E: [e-mail]
Victoria
Mark Kennedy
M: 0430 299 164
P: [phone]
F: [phone]
E: [e-mail]
South Australia
257 Grange Road
Findon, SA 5023
P: [phone]
F: [phone]
E: [e-mail]
Safety 3
Introduction 4
Specication 5
General Specications 5
Electrical Specications 6
Main Output 6
Waveform Characteristics 6
Output Characteristics 7
Other Inputs and Outputs 7
Modulation IN-OUT 8
Counter Characteristics 9
Getting Started 10
Front Panel 10
Rear Panel 11
Preparing For Use 11
Reference Operation 12
Maintenance 13
Cleaning 13
Adjustment Procedures 14
Required Test Equipment 14
Adjustments 14

3
Safety
Review the following safety precautions to avoid injury and prevent
damage to this instrument or any instruments connected to it.
• Read this manual carefully to ensure your personal safety and
to prevent damage either to the instruments or to equipment
connected to them.
• Before applying power, ensure that the line selector is in the
proper position for power source being used.
• Make sure that the power cord and the fuse type / rating is
specied for this product before use.
• This product is grounding through the grounding conductor of the
power cord. To avoid electric shock, the grounding conductor must
be connected to earth ground.
• Before making any connections to the input terminals of the
products, ensure that the properly grounded.
• To avoid personal injury, never operate the instrument without
covers or panels removed.
• To prevent product overheating, provide proper ventilation.
• Do not operate this product in wet, damp or explosive atmosphere.
• Marking on the instruments:
Caution, Refer to manual for
detailed instructions Protective Conductor Terminated
!

4
Introduction
The instrument is a versatile, high performance function generator. It provides sine,
square and triangle wave outputs over the frequency range from 0.01 Hz to 10 MHz
in eight overlapping ranges. It is a rugged, easy to operate, with high stability and
excellent heat dissipation. An auxiliary TTL output at the generator frequency is
available to synchronize external devices. The output voltage can be varied from
0V to 10V peak-to-peak into 50 ohms or to 20V into open circuit. The DC level of the
output can be adjusted using the offset control. Two front panel pushbuttons can
attenuate the output by 20 dB or 40 dB (60 dB in cascade operation). You can also
directly control amplitude and DC offset.
The instrument frequency is set with a front panel knob, measured with a built-in
counter and displayed using ve LED digits. Additionally, the internal counter can
be used to measure an external signal, up to 50 MHz, with up to 6-digit resolution. It
provides high input impedance and good sensitivity. The symmetry function allows
the user to vary the duty of frequency. When you push the switch of symmetry
ON, the output waveform symmetry is adjustable. The sweep-IN function provides
external voltage source to control the output frequency. The output frequency can
be swept above or below the selected frequency to a maximum of 100:1, depending
on the amplitude of input and the selected output frequency. The output waveform
can be internally linear or logarithmic swept over three decades. The start and stop
frequencies can be separately adjusted and displayed. The output waveform can
be internally or externally modulated in amplitude or in frequency. The internal
modulation signal is a 1 KHz sine wave. The AM level can be adjusted from 0 to 100%.
The exceptional accuracy, its portability and stackable design makes this valuable
instrument for using by the electronic engineer, the communication’s technician,
schools and laboratories.

5
General Specications
Display Mode 6 Digits of Seven Segment LED
Output Sine, Triangle, Square, Ramp, Pulse, TTL
Input Sweep, External counter and Modulation
Warm-up Time At least two hours
Operating Temperature 0°C~40°C (32°F to 104°F)
Storage Temperature -10°C to 60°C
Altitude Up to 2000 M
Relative Humidity Up to 80% for 0°C to 28°C
Up to 70% for 28°C to 40°C
Dimensions 261 x 71 x 211mm
Weight 1.8kg
Line Voltage AC 100V/120V (±10%) 50/60Hz, FUSE:0.4A/250V
AC 220V/240 (±10%) 50/60Hz, FUSE: 0.2A/250V
Power Consumption 40VA maximum
Ventilation Always keep the back of instrument far away the wall for
better ventilation, and nothing at among.
Standard Accessories User Manual in CD-ROM/ Power cord
Safety Designed in compliance with EN61010-1 (IEC1010-1)
Installation Category II, Pollution Degree 2 Environment
EMC Designed in compliance with EN61326
Specication

6
Electrical Specications
The accuracy is given as ± (% of span + No. of least signicant counts) at 23°C ± 5°C with relative humidity
less than 80% R.H.
Main Output
Range (Sine/Triangle/Square Waves)
Output Range Display Resolution Accuracy
Minimum Maximum
10mHz 1Hz 1mHz Not Specied
100mHz 10Hz 10mHz ±(3%+2)
1Hz 100Hz 100mHz
10Hz 1kHz 1Hz ±(0.3%+1)
100Hz 10kHz 1Hz or 0.001kHz
±(0.03%+1)
1kHz 100kHz 0.001kHz or 0.01kHz
10kHz 1MHz 0.01kHz or 0.1kHz
100kHz 10MHz 0.1kHz or 0.001MHz
Notes:
1. The specication is specied within 10% to 100% of maximum output range, and the waveform characteristics are limited to the
specied range also.
2. The display resolution and accuracy is relative to the span of internal counter.
3. Symmetry is specied within 2% at 1Hz~100kHz.
Waveform Characteristics
Triangle Wave Linearity
Frequency Linearity
1Hz ~100KHz > 98%
>100 KHz Not Specied
Sine Wave Distoration
Distortion Harmonic Ratio
10Hz ~ 100kHz 100kHz ~1MHz 1MHz ~10MHz
<2% <-30dB <-20dB
Notes:
1. The distortion isn’t specied for less than 10 Hz.
Square Wave
Transition time Aberration
< 30ns < 5% of P-P amplitude +/- 50 mV

7
Output Characteristics
Amplitude
Distortion Minimum (CCW) Maximum (CCW) Flatness
< 1MHz 1MHz - 10MHz
No Load ≥ 2Vp-p ≥ 20Vp-p ±1dB ±3dB
50 Ω ≥ Vp-p ≥ 10Vp-p
Notes:
1. Output impedance is 50Ω±10% @ 100kHz.
2. The amplitude should consider additional tolerance of atness.
3. FCCW: Full counterclockwise, FCW: Full clockwise.
4. Output protection: The generator main output is non-destructively protected against short circuit to ground or to any voltage
practically available in electronic laboratories. specication is specied within 10% to 100% of maximum output range, and the
waveform characteristics are limited to the specied range also.
Attenuator
Attenuator Switch Attenuator @ 1kHz
-20dB -40dB
ON OFF -20dB
±2%OFF ON -40dB
ON ON -60dB
DC Offset
Load DC Offset Knob - see Note 1 Ripple- see Note 2
FCCW FCW
No Load < -10V > +10V ≥ 10mVp-p
50 Ω < -5V > +5V
Notes:
1. Set the switch of DC OFFSET to ON position, and set the function switches of Sine, Triangle and Square to OFF position. Then test the
DC offset.
2. Before testing ripple, set the frequency range to lowest range and turn frequency knob to MIN position and be sure to set Amplitude
Knob at FCCW. Otherwise, it will induce noise around 50mVp-p based on different frequency.
Other Inputs and Outputs
Synchronous Output
Output Impedance Output level Transition time Fan out *2
50 Ω typical *1 TTL level, > 3V @ open circuit < 20 ns Typical 20 TTL loads
Notes:
1. The output Impedance is measured at 1kΩ load or above.
2. The capability of fan out depends on different TTL logics and the level is greater than 2V
Symmetry
Range Symmetry Knob
FCCW FCW
Up to 1MHz ≤ 10% ≥ 90%
Notes:
1. Symmetry from 10% to 90% at full output amplitude terminated into 50Ω
External Sweep-IN
Impedance Sweep Range Sweep Ratio- see Note 1
14K Ω typical 0.2Hz~100Hz 1:100
Notes:
1. The frequency output will be proportional to the level of SWEEP-IN connector. 0–5V input for up to 100:1 frequency change
approximately. To avoid damage to this instrument, ensure that the maximum voltage into this BNC is no more than ± 10 Vp.
2. Turn off the Sweep ON switch.

8
Internal Sweep/Sweep-OUT
Impedance Sweep Rate Output Level - see Note 1
Minimum Maximum Minimum Maximum
600 Ω typical >5s <10 ms >0.3V <4.5V
Notes:
1. The output level of SWEEP-OUT BNC is proportional to the knob of STOP FREQ.
2. The frequency knob is set to full CCW for start frequency, and set the knob of stop frequency to full CW. The STOP switch is used to
indicate stop sweep frequency. The sweep width is variable up to 100:1 frequency change approximately.
Sweep-OUT (Linear/Logarithmic Selection)
Impedance Sweep Rate Output Level - see Note 1
Minimum Maximum Minimum Maximum
600 Ω typical >5s <10 ms >0.3V <4.5V
Notes:
1. The output level of SWEEP-OUT BNC is proportional to the knob of LEVEL STOP.
2. The frequency knob is set to full CCW for start frequency, and Set the knob of LEVEL STOP to full CW. The STOP switch is used to
indicate stop sweep frequency. The sweep width is variable up to 100:1 frequency change approximately.
3. Turn SWEEP switch ON and Modulation Switch to off.
Modulation IN-OUT
AM Modulation
INT/EXT Impedance (Typical) Depth Modulation Kob Mod. BNC
EXT 0.6~10kΩ- see Note 3 0~100% FCCW~FCW DC~20kHz- see Note 2
INT 600Ω 0% FCCW 1.06kHz±10%
100% FCW 1.06kHz±10%
Notes:
1. The SWEEP Switch is set to OFF state and Modulation switch ON. The internal modulation frequency is 1.06kHz±10%.
2. To avoid damaging this instrument, ensure that the maximum voltage into this BNC is no more than ± 10 Vp. A 4 Vp-p minimum signal
is required for maximum modulation (FCW). Otherwise the input level is proportional to modulation knob. For greater than 20 kHz
signal, can be used but not specied.
3. The input impedance is 10 kΩ approximate at FCCW of modulation knob, and 600Ω approximate at FCW of modulation knob.
4. The Internal AM mode generates an amplitude modulated signal of xed carrier frequency. An internally-generated sinusoid is used
as a modulating signal to vary the amplitude of a carrier sinusoid. The modulation waveform is not suppressed carrier; i.e. a xed
amount of carrier power is always present in the modulated signal. The External AM mode generates an amplitude modulated signal
of xed carrier frequency. An externally-supplied signal on the MOD-IN BNC is used as a modulating signal to vary the amplitude of
a carrier sinusoid. The modulation waveform is not suppressed carrier; i.e. a xed amount of carrier power is always present in the
modulated signal
FM Modulation
INT/EXT Impedance (Typical) Deviation - see Note 2 Modulation Kob Mod. BNC
EXT 6~10kΩ- see Note 4 0~±10% FCCW~FCW DC~20kHz- see Note 3
INT 600Ω 0~±10% FCCW~FCW 1.06kHz±10%
Notes:
1. The SWEEP Switch is set to OFF state and Modulation switch ON. The internal modulation frequency is 1.06kHz±10%.
2. Deviation is proportional at carrier frequency of 1 KHz and the frequency Knob is xed.
3. To avoid damaging this instrument, ensure that the maximum voltage into this BNC is no more than ± 10 Vp. A 4 Vp-p minimum signal
is required for maximum modulation (FCW). Additional deviation is proportional to the signal level, but the level shall be less than the
limitation. For greater than 20 kHz signal, can be used but not specied.
4. The input impedance is 10kΩ approximate at FCCW of modulation knob, and 6kΩ approximate at FCW of modulation knob.
5. The Internal FM mode generates a frequency-modulated signal of xed amplitude. An internally generated sinusoid is used as a
modulating signal to vary the frequency of a carrier sinusoid. The External FM mode generates a frequency-modulated signal of xed
amplitude. An externally supplied signal on the MOD-IN BNC is used to vary the frequency of a carrier sinusoid.

9
Counter Characteristics IN-OUT
Internal Counter
Range Display Resolution- see Note 1 Accuracy
10mHz~1000mHz 1mHz Not Specied
1.00Hz~10.00Hz 0.01Hz ± (3%+2)
10.0Hz~100.0 Hz 0.1Hz
1~ 999 Hz 1 Hz ± (0.3% +1)
1.000~9.999 kHz 0.001 kHz
± (0.03% +1)
10.00~99.99 kHz 0.01kHz
100.0~999.9 kHz 0.1 kHz
1.000~10.000 MHz 0.001MHz
Notes:
1. The display resolution of internal counter is according to the ranges of main output setting.
External Counter
Load DC Offset Knob - see Note 1 Ripple- see Note 2
5 ~ 999 Hz 1 Hz ±(Time base error +3 counts) 20mV RMS1 ~ 999.999 kHz 0.001 kHz
1 ~20.0000 MHz 0.0001 MHz ±(Time base error +1 count)
>20 ~ 50 MHz 0.0001 MHz 60 mV RMS
Notes:
1. Time base: 10 MHz
2. Time base error: 10 PPM at (23 ± 5 °C)
3. Input impedance: 1MΩ typical
4. The counter display will be 0 Hz with 50Ω load on no signal input.
5. The maximum input voltage: < 42Vpk

10
Getting Started
Electrical Specications
Front Panel
Figure 1 shows the front panel controls, connectors and indicators.
1. POWER SWITCH: To toggle instrument power ON and
OFF.
2. Counter READOUT: A six-digit display that shows
frequency generator or external counter. The LED
indicates the frequency units of MHz, KHz, Hz or mHz
for the counter readout. The decimal point and unit is
automatically placed in the appropriate position.
3. RANGE BUTTONS: Push buttons of UP/DOWN to set the
frequency range of the output signal. The frequency
range will be 10 times difference on each step.
4. SYMMETRY KNOB/SWITCH: The knob is used to vary
either positive pulse/ramp or negative pulse/ramp.
Push the symmetry switch to “ON” before rotating this
knob.
5. DC OFFSET KNOB/SWITCH: The switch is set at OFF
position for normal operation.The knob sets the DC
level and therefore the polarity of the OUTPUT signal
after the switch ON.
6. SWEEP RATE: Rotate the Knob to adjust the sweep rate.
Adjusts how often the frequency sweep reiterates.
7. SWEEP SWITCHES: The ON switch is used to enable
sweep function. The STOP switch is used to see the stop
frequency. The LIN/LOG switch is used to select linear
or logarithmic sweep, SW OFF is LIN and ON is LOG.
8. MODULATION SWITCHES: The ON switch is used to
enable the modulation function. The EXT/INT switch is
used select modulation signal, switch ON for internal
and OFF for external. The AM/FM switch is used select
modulation type, switch ON for AM and OFF for FM.
Ensure the ON switch of sweep is set to OFF state for
the AM/FM modulation function.
9. MODULATION / LEVEL STOP KNOB: For sweep function,
this knob is used to adjust the sweep width.
10. EXT-COUNTER INPUT: BNC connector is used for the
external signal frequency measurement. The input
frequency is from 5Hz to 50MHz.
11. EXT-COUNTER SWITCH: Push the switch to ON for
external counter.
12. FREQUENCY KNOB: Rotate this knob to set the desired
frequency output from the generator.
13. SYNC OUT BNC: This connector sends out a synchronous
signal TTL level, the output frequency is same as MAIN
output.
14. SWEEP IN-OUT BNC: Sweep signal output and input
connector. The SWEEP IN-OUT BNC will be an output
connector when you push the switch of SWEEP ON;
otherwise it is an input connector.
15. MODULATION IN-OUT: Modulation signal output and
input connector. In the internal modulation mode, a
1-KHz sine wave is available on this BNC connector for
external synchronization. In the external modulation
mode, an input signal applied here will modulate the
output. A 4V peak-to-peak signal is required for 100%
AM modulation.
16. WAVE SELECTOR: Push the switch to select the output
waveforms.
17. AMPLITUDE KNOB: Adjust the voltage within the
presently selected range. Rotate this knob to adjust the
voltage level of main output signal (OUTPUT BNC).
18. OUTPUT BNC: Main output of function generator.
19. ATTENUATORS: Push the switch to turn attenuator
ON. Attenuates the amplitude of the selected output
waveform in 20-dB steps to a maximum of 60 dB when
both pressed.

11
Electrical Specications
Rear Panel
In addition to line voltage selector, fuse and power cord receptacle
Preparing For Use
Precautions
In order to avoid damaging this instrument, make sure that the unit is set to the correct line voltage for
your area. Also make sure that the correct fuse is used for the line voltage. These line voltages are 100V,
120V, 220V and 240V at 50/60HZ.
Warning
To avoid damage the equipment use only specied fuse when change the power line voltage. Please refer
to following table:
SELECTOR LINE VOLTAGE FUSE
100V 92~110V 50/60Hz 0.4A
120V 108~132V 50/60Hz 0.4A
220V 198~242V 50/60Hz 0.2A
240V 216~264V 50/60Hz 0.2A
Avoid touching the rear panel of the instrument during operation. The heat sink is nearby the rear panel,
contacting it could result in skin burns. Avoid using the function generator in ambient temperatures above
specied.
Always keep sufcient air space between the rear of instrument and wall to prevent internal heat build-
up.
Although the function generator is protected against reverse polarity damage the circuit being powered
may not include such protection. Always carefully observe polarity incorrect polarity may damage the
equipment under test.
Do not exceed the voltage rating of the circuit being powered.
1. VENTILATION FAN: Always keep nothing on the front of fan for better ventilation.
2. POWER CORD SOCKET
3. LINE VOLTAGE SELECTOR AND FUSE HOLDER: To select line voltage and fuse replacement.

12
Reference Operation
This section describes several advanced functions. The variety of swept available from the function
generator make it especially useful for such applications as test servo-system or amplier response,
distortion and stability. It can use for FM generator, frequency multiplication, or as a variable, beat-
frequency oscillator. The synchronous and sweep outputs can be used as a source for TTL logic or to
synchronize as external device, such as an oscilloscope.
Main output
1. Connect the Main output connector to the input BNC
connector on an oscilloscope.
2. Switch off the external counter button.
3. Select the waveform by pushing function selector.
4. Push UP/DOWN to select a range of frequency output.
5. Turn the frequency knob to adjust the frequency output. The
output value will be indicated on the display
6. Turn the amplitude knob to adjust the output level. The
attenuator switch can be pushed to attenuate the output
level for –20 dB if necessary.
7. Push DC offset switch to the ON position, an additional DC
level will be used to shift output level. The knob of DC offset
is used to adjust DC level.
Symmetry
1. Follow the operation of Main output, but with the symmetry
button switched ON.
2. The frequency will be divided ten from the original frequency
output around.
3. Turn the knob of symmetry to adjust duty cycle from 10%
to 90 %.
4. Observe the results on the oscilloscope.
SYNC. OUTPUT
1. Connect the SYNC output connector to the input BNC
connector on an oscilloscope.
2. The level and symmetry will be a constant value, but the
frequency will follow the Main output. Please refer to main
output for frequency change.
3. The knobs for DC offset and amplitude do not affect the
output.
4. Observe the results on the oscilloscope
Internal Sweep/Sweep-OUT
1. Connect the Main output connector to the CH1 BNC
connector on the oscilloscope.
2. Connect the SWEEP in-out BNC to the CH2 BNC connector on
the oscilloscope.
3. Turn the frequency knob to set desired sweep start
frequency.
4. Push the sweep switch to the ON position.
5. Turn the LEVEL STOP knob to set stop frequency. Push
the STOP switch to the ON position to see the stop sweep
frequency on the display. Turn off the STOP switch once you
nished the setting.
6. The main output will sweep the desired range of frequencies
and the SWEEP in-out BNC is output a linear level.
7. Turn the sweep rate knob to set how often the frequency
sweep reiterates.
8. Observe the results on the oscilloscope.
Sweep-IN
1. Push the sweep switch to the OFF position.
2. Connect the Main output connector to the CH1 BNC
connector on the oscilloscope.
3. Connect the SWEEP in-out BNC to another function
generator.
4. Turn the frequency knob to set desired sweep start
frequency.
5. The main output will sweep the desired range of frequencies
according to the input level of SWEEP in-out BNC.
6. Observe the results on the oscilloscope.
AM Modulation
1. Connect the Main output connector to the CH1 BNC
connector on the oscilloscope.
2. Push the sweep switch to the OFF position.
3. Push the modulation switch to the ON position.
4. Push AM/FM switch to the ON position for AM modulation.
5. Push INT/EXT switch to the ON position for internal
modulation.
6. Turn the frequency knob to set desired carrier frequency.
7. Turn the modulation knob to set modulation amplitude.
8. Observe the results on the oscilloscope.
FM Modulation
1. Connect the Main output connector to the CH1 BNC
connector on the oscilloscope.
2. Push the sweep switch to the OFF position.
3. Push the modulation switch to the ON position.
4. Push AM/FM switch to the OFF position for FM modulation.
5. Push INT/EXT switch to the ON position for internal
modulation.
6. Turn the frequency knob to set desired carrier frequency.
7. Turn the modulation knob to set how many deviations for
frequency modulation.
8. Observe the results on the oscilloscope.

13
Maintenance
Warning!
To avoid electrical shock or damaging this instrument, never get water into the meter.
Cleaning
Before cleaning this instrument, make sure the power is switched in OFF position and the power cord
is disconnected from the AC outlet. To clean the meter, wipe the dirty parts with gauze or soft cloth
soak with diluted neutral detergent. Avoid getting the instrument too wet to prevent the detergent from
penetrating into inside parts and causing damages. After cleaning, leave the instrument until it dries
completely. Don’t use chemicals containing benzine, benzene, toluene, xylene, acetone or similar solvents.
Warning!
The following instructions are for qualied personnel only. To avoid electrical shock, do not perform any
servicing other than that contained in the operating instructions unless you are qualied to do so.
When serving, use only specied replacement parts as described hereinafter.
To avoid electric shock, disconnect the power cord from the unit before changing fuse or input voltage
selector.
Selecting different input voltage & protection fuse replacement
To select different input voltage level of AC 100V, 120V 220V or 240V, simply switch to the selected voltage,
so the desired voltage is displayed in the window. Please make sure that the protection fuse rating
matches.
When replacing fuse or selecting the input voltage, please use fuse ratings as specied.

14
Adjustment Procedures
Caution
The following instructions are for qualied service personnel only. To avoid electrical shock, do not
perform any servicing other than contained in the operation instructions unless you are qualied to do so.
Before calibrating and adjusting, make sure that the instrument has warmed up for at least 2 hours.
Required Test Equipment
The following Table lists the test equipment necessary to perform the adjustments and the maintenance of this instrument. Any equipment
that satises the critical specications given in the table may be substituted for the recommended model.
Instrument Type Required Specications
Oscilloscope 100 MHz bandwidth, dual channel
DVM 4.5 digits, true RMS
Counter 100 MHz, 2 CH, time interval capability
Distortion Analyser 10 Hz – 100 KHz, ± 0.1%
Function Generator 10 MHz frequency
Termination Feed through termination 50 ohm
Cable Assembly BNC-BNC, 50 ohms, RG-58
BNC Adapters BNC to banana, BNC tees
Adjustments
A: Frequency Counter and Oscillator
Adjustments
1. Press EXT-COUNTER switch on front panel. Connect
external source (sine waveform, 10MHz, amplitude of 10
mV rms). Connect a probe to TP600 and to the scope.
Adjust R610 for a square wave display on the scope.
2. Remove the probe from TP600, then adjust C104 for
counter reading to 10.0000~10.0002 MHz.
B: Function adjustment of Triangle
wave
1. Set the controls as follows:
FUNCTION TRIANGLE
AMPLITUDE MAX
DC OFFSET OFF
FREQUENCY 10 KHz
SYMMETRY OFF
SWEEP OFF
2. Adjust R225 for a symmetrical around zero waveform.
3. Press MODE switch to TRIG. Adjust R220 for a zero base
line (0V ±10 mV) on the oscilloscope.
C: Function adjustment of Square wave
1. Set the controls as follows:
FUNCTION SQUARE
AMPLITUDE MAX
DC OFFSET OFF
FREQUENCY 10 KHz
SYMMETRY OFF
2. Adjust R340 for a symmetrical square wave around zero.

15
D: Frequency Adjustment
1. Connect the OUTPUT to an external counter.
2. Set the controls as follows:
FUNCTION TRIANGLE
AMPLITUDE MIDDLE
DC OFFSET OFF
3. Turn the FREQUENCY control knobs to full CW and select
the proper RANGE for a reading of > 1 KHz on the display.
4. Adjust R259 for a 50% symmetry waveform.
5. Turn the FREQUENCY control knob CCW and set the
frequency to 100 Hz on the display counter. It is important
to stay in the same range.
6. Adjust R249 for a 50% symmetry waveform.
7. Repeat steps 5 and 6 for best results on both ends.
8. Select the Frequency range from 10Hz to 100.0Hz.
9. Connect the output to an external counter. Turn the
frequency knob to full CW position. Adjust R211 for a
frequency reading to 102.0Hz on the external counter
10. Turn the frequency knob for an internal counter reading to
90.0Hz. Adjust R637 for a display of 90.0 ±0.2Hz.
11. Turn the frequency knob to 10Hz reading on the counter.
Adjust R638 for a display reading of 10.0Hz ±0.2Hz.
12. Repeat steps 10 and 11 for best result on both ends.
13. Select the Frequency Range to 10MHz. Rotate the
frequency knob to full CW. Adjust C217 for a reading
>10.3MHz.
14. Turn the frequency knob to full CCW, and then adjust R262
for a reading of 50±5 KHz.
E: Output amplitude Adjustment
1. Terminate the output in 50 ohms and connect an
oscilloscope and a multi-meter to the output.
2. With all function pushbuttons out and the knob of
AMPLITUDE control at full CCW position, and then adjust
R401 for output of 0V ±10 mV.
3. Turn AMPLITUDE control to full CW and adjust R450 for
0V ±10 mV.
4. Set the amplitude control to full CW position and select
triangle waveform. Check for a peak amplitude of >10.6V.
5. Set frequency to 10KHz and adjust R225 for a symmetrical
around zero waveform.
F: Function adjustment of Sine wave.
1. Connect a distortion analyzer through a 50 ohms
termination to the OUTPUT and monitor with an
oscilloscope also.
2. Set the FG controls as follows:
FUNCTION SINE
AMPLITUDE MAX
DC OFFSET OFF
FREQUENCY 100 KHz
SYMMETRY OFF
3. Set frequency range to 100kHz and FREQ. Knob for 100kHz
output.
4. Adjust R309 and R320 for minimum distortion and <0.9%.
5. Set frequency range to 100Hz, and FREQ. Knob for 100 Hz
output.
6. Adjust R309 for minimum distortion that should be as
close as to prior value on 100kHz.
7. To check frequency range for 100kHz. If the distortion >
0.9%, to adjust steps 3~ 7 again.
8. Adjust R359/R360 for a round sine waveform of top and
bottom without any peak.
9. Adjust R314 for a symmetrical waveform around zero.
G: Sweep OUT (LOG) adjustment
10. Connect the Sweep OUT to an oscillator.
11. Set the FG controls as follows:
Modulation Knob FCW
Modulation switch OFF
SWEEP Knob FCW
Sweep switch OFF
LIN/LOG ON (LOG)
12. Adjust R533 for a 7V log waveform display.

Western Australia
Unit 2/17 Casino Street,
Welshpool, WA 6016
P: [phone]
F: [phone]
E: [e-mail]
Victoria
Mark Kennedy
M: 0430 299 164
P: [phone]
F: [phone]
E: [e-mail]
South Australia
257 Grange Road
Findon, SA 5023
P: [phone]
F: [phone]
E: [e-mail]