Elenco 5MHz Function Generator User Manual

5MHz FUNCTION GENERATOR

MODEL GF-8056

User’s Manual

Copyright © 2004 by ElencoTMElectronics, Inc. All rights reserved. 753117

No part of this book shall be reproduced by any means; electronic, photocopying, or otherwise without written permission from the publisher.

Elenco

TM

Electronics, Inc.

NOTICE BEFORE OPERATION

1. Unpack the instrument:

After receiving the instrument, immediately
unpack and inspect it for any damage which
might have occured during transportation or
shortage of accessories. If any signs of damage
and/or shortage of accessories are found, notify
the dealer immediately.

2. Environments:

Normal operating temperature of the instrument
is 10°C to 40°C (50°F to 104°F). Operation of the
instrument outside of this temperature range may
cause damage to the circuits.

Do not use the instrument in a place where
strong magnetic or electric fields exist. Such
fields may disturb the measurement.

3. Check the Line Voltage:

The instrument can operate on any one of the
line voltages shown in the table below by
inserting the line voltage selector plug in the
corresponding position on the rear panel.
Before connecting the power plug to an AC line
outlet, be sure to check that voltage selector plug
is set in the correct position corresponding to the
line voltage.

CAUTION: The instrument may not properly
operate or may be damaged if it is
connected to an AC line with the wrong
voltage. When line voltages are changed,
replacement of the fuses is also required.

Hints for operating the instrument:

Observe the following suggestions for successful
instrument operation.

1. Never place heavy objects on the instrument.

2. Never place a hot soldering iron on or near the
instrument.

3. Never insert wires, pins or other metal objects
into the ventilation fan.

4. Never move or pull the instrument with power
cord or probe cord.
Never move the instrument especially when the
power cord or signal probe is connected to a
circuit.

5. If the instrument is used in a manner not
specified by the manufacturer, the protection
provided by the equipment may be impaired.

WARNING: The following precautions must
be observed to help prevent electric shock.

1. When the instrument is used for testing, there is
always a certain amount of danger from electrical
shock. The person using the instrument should
be a qualified electronics technician or otherwise
trained and qualified to work in such
circumstance.

2. Do not operate the instrument with the cover
removed unless you are a qualified service
technician.

3. The ground wire of the 3-wire AC power plug
places the chassis and housing of the instrument
at earth ground. Use only a 3-wire outlet, and do
not attempt to defeat the ground wire connection
or float the instrument. Doing so may pose a
great safety hazard.

4. Do not obstruct the ventilation holes in the rear
panel, as this will increase the internal
temperature.

5. Never apply an external voltage to the output
BNC connector of the instrument.

6. Excessive voltage applied to the input BNC
connector may damage the instrument.

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Selector Line Voltage Fuse

115V 100~125V 50/60Hz 600mA
230V 220~240V 50/60Hz 300mA

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GENERAL

DESCRIPTION

The GF-8056 is a deluxe function generator
combined with a 5-digit, high-resolution 60MHz
counter. The GF-8056 is a rugged, easy-to­operate, excellent heat dissipating and high
stability instrument.
The GF-8056 is a 4-in-1 instrument. It can be
used as the following described four kinds of
electronic instruments respectively:

1. As a Function Generator:

Eight waveforms selected by a rotary switch
instead of push-button to prevent accidental
touching or bad connections. Maximum output
20Vp-p (no load) and minimum output 0.1Vp-p
(no load).

2. As a Pulse Generator:

The GF-8056 provides positive pulse and reverse
negative pulse output with the Pull Reverse
Switch, maximum output 20Vp-p (no load).
Frequency display by the LED, pulse width from

0.4sec to 100ns. Can meet most audio, video
and other basic electronic application
requirements.

3. As a Sweep Generator:

The GF-8056 provides linear sweep or log
sweep. Use the selection switch to select the
sweep mode. Maximum sweep width 1:100 and
sweep speed 5sec to 10ms. Also, the GF-8056
provides VCF input and synchronous output
function. Easy-to-operate.

4. As a Counter:

The GF-8056 is a 5-digit, micro-controlled
counter. The GF-8056 features auto-range, auto­gate time and high-resolution - 0.001Hz, input
impedance - 1MΩ, bandwidth - 0.2Hz~60MHz,
voltage resistance - 150Vp-p. Other features the
GF-8056 provides: adjustable trigger +

2.5V with
LED indication. Display unit auto-indicate, HF /
LF selector, 100kHz filter.

5. As a DC Voltage:

The GF-8056 provides a DC output function. The
output voltage can be adjusted from +10V to –10.
It can be used as a low-power DC source.

SPECIFICATIONS

1. General Specifications:
A. Generator

Frequency: 0.05Hz~5MHz, display on 5-digit

LED display, maximum resolution

0.001Hz in 8 ranges.

Waveform output: Sine, square, triangle,

positive, ramp, negative
ramp, positive pulse and
negative pulse, DC, 8
waveforms.

Stability:

0.1%~15 minutes after switch “ON”

0.2%~24 hrs. after switch “ON”

DC offset: +

10V (no load), +5V (50Ω load),

continuously adjustable,
controlled by an offset switch.

B. Counter

Display: 5 digits 0.36” red LED
Max. resolution: 0.001Hz
Display unit: Hz/kHz automatically

controlled by CPU

C. Common Specification

Operating temperature: 0°C~40°C,

10%~80% R.H.

Storage temperature: –20°C~70°C,

0%~90% R.H.

Power source: AC 115V (+

10%) 50/60Hz,
FUSE: 600mA AC 230V
(+

10%) 50/60Hz,

FUSE: 300mA

Power consumption: 25W
Ventilation: DC 12V / 100mA fan
Dimensions: 275 x 90 x 300mm
Weight: 2.5 kgs. net.
Accessory: Power cord, operation manual

2. Triangle Wave:

Frequency: 0.05Hz~5MHz
Symmetry: 50% (rise wave) to 50% (fall

wave), < 1%, 1Hz~100kHz

Linearity: < 1%, (1Hz~100kHz)

SPECIFICATIONS (continued)

3. Sine Wave:

Frequency: 0.05Hz~5MHz
Distortion: < 1%, 1Hz~100kHz
Harmonic ratio: < 30dB, 100kHz~5MHz
Frequency response: < 0.1dB, up to 100kHz

< 1.5dB, 100kHz to 5MHz

4. Square Wave:

Frequency: 0.05Hz~5MHz
Symmetry: 50% (positive half) to 50% (negative

half). < 1%, 1Hz~100kHz

Rise time: < 90ns (20Vp-p , no load)

5. Ramp Wave:

Frequency: 0.05Hz~4.5MHz, 8 range

selected by rotary switch

Symmetry:

90% (rise wave) to 10% (fall wave),
continuously adjustable

Linearity:

< 1%, (0.1Hz~100kHz)

6. Positive Pulse:

Frequency: 0.05Hz~4.5MHz
Width:

0.4sec~100ns, continuously adjustable

Symmetry:

1:1 to 10:1 continuously adjustable
1Hz~100kHz

Reverse:

Pull the Rev. switch, the output will
become a negative pulse

7. DC:

Output voltage: +10V to –10V continuously

adjustable by OFFSET switch

8. Main Output:

Output impedance: 50Ω, < 2%
Max. output:

20Vp-p (no load), +1Vp-p

10Vp-p (50Ω load) +

0.5V

Min. output:

0.1Vp-p (no load),
or 0.05Vp-p (50Ω load)

Attenuator:

One –26dB (1/20) attenuator,
< 2% accuracy

9. Synchonous Output:

Output impedance: 50Ω, < 2% accuracy
Output level: TTL level, > 3Vp-p fixed amplitude
Fan out: >20
Rise time: <60nS

10. V.C.F. Input:

Input impedance: 0~10V
Input frequency: DC~1kHz variable 1:1 to 1:100

11. Sweep Synchronous Output:

Output impedance: 1kΩ, < 2%
Output waveform: Linear or log sweep ramp wave
Output amplitude: 10Vp-p (no load) or

5Vp-p (1kΩ load)

Output frequency:

0.2Hz~100Hz continuously
adjustable

12. Sweep Generator:

Sweep form: Linear or log switchable
Sweep speed:

5sec~10ms, continuously
adjustable

Sweep width:

1:1~1:100

13. Counter:

Display: 5 digits, 0.36” red LED display
Max. Resolution: 0.001Hz
Display unit: Hz / kHz autorange
Time base: 20MHz
Temperature coefficient: < 20ppm / °C
Accuracy: <0.02% +

1 digit

Power supply: +5V, 160mA

Internal Counter:

Range: Autorange with 4 resolution,

0.001Hz / 0.01Hz / 0.001kHz /

0.01kHz, auto-controlled by CPU

Display: 0.500Hz~5000.0kHz auto-select by

CPU

Gate time: Variable, 0.25sec~5sec,

auto-setting

Min. display digits: 4 digits

External Counter:

Max. input voltage: < 150Vrms
Input impedance: 1MΩ, < 2%
Input frequency: 0.2Hz ~60MHz
Coupling: HF - 100kHz and greater

LF - 100kHz and lower
Min. display digits: 4 digits
Gate time: 0.25sec~10sec, auto-setting

depends on the input frequency

Sensitivity: > 30mVrms (1MHz)

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