MFJ MFJ-5004 User Manual

MFJ-5004 Instr ucti on Man ual Professional Function Generator

Introduction

Thank for your purchase of the MFJ-5004 Professional Function Generator. The
MFJ-5004 provides precision sine, square, and triangle waveforms from 1 Hz to 1 M H z i n
six decade ranges. ' Waveform amplitude is cont inuously adjustable fro m 0 to 12
volts peak-to-peak. DC offset is adjustable from -6 to +6 VDC. Output impedance
is 375 ohms, wit h sh ort- cir cuit outp ut pr otec ti on.

Please read this instruction manual carefully before operating the MFJ-5004
Professional Function Generator!

Control Functions

Refer to the following diagram for location of each control.

Power Section

Power Adapter: A 12 VAC power adapter included with this unit for co nne cti ng

to a 120 VAC 60 Hz wall outlet. The MFJ-5004 is
designed to run from 12 VAC on ly and will not work
with conventional 12 VDC power sources. Use only
the wall-adapter transformer supplied or an equivalent
AC source.

Power Switch: Used to turn the power on or off. When power is on,

the red LED will illuminate.

PWR LED: Illuminates to indicate the power is on.

2

MFJ-5004 Instruction Manual Professional Function Generator

Function Gen era tor

Multiplier Switch: A r ot a r y s w i tc h t h at s e le c t s on e o f si x f re q u en c y

ranges for the function generator.

Frequency Control:

A potentiometer that allows for the adjustment of the
function generator frequency from 1 to 10 times the
Multiplier switch settin g.

Amplitude Control:

A potentiometer that allows for the adjustment of the
waveform amplitude from 0 to 12 Vp-p (volts-peakto­peak).

DC Offset Control: A potentiometer that allows f or the ad j ust ment of the wavefo rm D

Waveform Switch: A slide switch that selects one of three function generator

waveforms: square, triangle or sine waveform.

Output Connector: BNC co nnect i o n f or t h e f uncti o n ge n e r a t or out p ut .

Operation

To perform the following operation, you need an oscilloscope.

1. Press the Power s witch to the "OFF" p osition. In sert the 12 VA C adapte r into
the Power jack at the back panel of the MFJ-5004. Plug the adapter into a
wall outlet and turn on the Power switch. The PWR LED should illuminate.

2. Set the Multiplier knob to the 10

2

position.
Set the Fre quency k nob to t he 12 o' cloc k p ositi on . Set the
Amplitude knob to maximum. Set the DC Offset knob
to the 12 o'clock position. Set the Wa v e f orm sw itch to
sine wave.

3. Connect the scope probe to the BNC Output connector and observe the
output signal. Set the oscilloscope time base and input attenuator for proper
display. A sine wave should be observed.

4. Adjust the Multiplier, Frequency, Amplitude, and /or DC Offset knob an d
observe the outpu t signal. Ad justin g the Multip lier or Frequenc y knob

r

2