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JYE Tech FG085 Operation Manual

Minidds function generator. applicable models: 08501, 08501k, 08502k, 08503, 08503k, 08504k
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FG085 miniDDS Function Generator
Manual of Operation
Applicable Models: 08501, 08501K, 08502K, 08503, 08503K, 08504K
Applicable Firmware Version: 1 ) 113-08501-130 or later (for U5)
1.
Getting Started ...................................................................................................................... 1
2.
Front Panel Features ............................................................................................................. 2
3.
Connectors ............................................................................................................................ 4
4.
FG085 Operations................................................................................................................. 6
Continuous Waveform (CW) Mode............................................................................................................... 6
Frequency .............................................................................................................................................. 7
Amplitude .............................................................................................................................................. 8
DC Offset............................................................................................................................................... 8
Incremental Adjustment......................................................................................................................... 8
Duty Cycle............................................................................................................................................. 8
Trigger Function .................................................................................................................................... 9
Frequency Sweeping Mode ........................................................................................................................... 9
Range and Rate.................................................................................................................................... 11
Sweep Direction .................................................................................................................................. 12
Trigger Function .................................................................................................................................. 12
Sync Pulse Output ............................................................................................................................... 12
Amplitude ............................................................................................................................................ 12
DC Offset............................................................................................................................................. 12
Servo Position Mode ................................................................................................................................... 13
Pulse Width and ................................................................................................................................... 14
Pulse Amplitude................................................................................................................................... 14
Increment and ...................................................................................................................................... 14
Servo Signal Settings........................................................................................................................... 15
Servo Run Mode.......................................................................................................................................... 15
States ................................................................................................................................................... 16
Change Settings ................................................................................................................................... 16
Arbitrary Waveform Generation (AWG) ..................................................................................................... 16
How It works ....................................................................................................................................... 16
Define Waveform File ......................................................................................................................... 17
Download Waveform........................................................................................................................... 17
Select User Waveform ......................................................................................................................... 17
Waveform Download........................................................................................................................... 18
5.
Firmware Upgrade .............................................................................................................. 18
6.
Technical Support ............................................................................................................... 19
7.
Specifications...................................................................................................................... 19
Revision History .................................................................................................................................. 20

1. Getting Started

Introduction
JYE Tech
2 ) 113-08502-050 or later (for U6)
The FG085 is a low cost versatile function generator capable of
producing continuous signal, frequency sweeping signal, servo test
signal, and user defined arbitrary signals. It was designed as an
easy-to-use tool for electronic hobbyists. The operation of FG085
is extremely straightforward. The following examples will lead
you step-by-step through some typical uses.
- 1 -
DN085-01v06
www.jyetech.com

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Summary of Contents for JYE Tech FG085

  • Page 1: Table Of Contents

    Revision History ..........................20 1. Getting Started Introduction The FG085 is a low cost versatile function generator capable of producing continuous signal, frequency sweeping signal, servo test signal, and user defined arbitrary signals. It was designed as an easy-to-use tool for electronic hobbyists. The operation of FG085 is extremely straightforward.

  • Page 2: Front Panel Features

    DN085-01v06 Data Entry Setting of FG085 signal parameters is done by first pressing one of the parameter keys (F/T, AMP, or OFS). The display of that parameter will be cleared and an underline is shown, indicating place for new value to be typed in. If at the moment you hit a parameter key the cursor is not currently at that parameter just press the key one more time to make the underline shown.
  • Page 3 3 ) Digit Keys The numeric keypad allows for direct entry of the FG085’s parameters. To change a parameter value simply press the parameter key (if cursor is not currently at the parameter press the parameter key twice) and then type a new value.

  • Page 4: Connectors

    DN085-01v06 state This key selects FG085’s working modes. 8 ) MODE Key Display of current output frequency or period. 9 ) Frequency (Period) Display of current waveform type. 10 ) Waveform Display of current output DC offset. 11 ) DC Offset Display of current output amplitude.
  • Page 5 This is the DC power supply input connector. Its center core should be connected to the positive pole of power supply. FG085 is specified for 14V – 16V DC. The current capacity of power supply should be greater than 200mA average.

  • Page 6: Fg085 Operations

    DN085-01v06 4. FG085 Operations Power-on Push down the power switch to turn on FG085. It will first display model name. Then manufacturer/vendor name follows. After displaying firmware versions the unit enters normal working state. The output amplitude display is only correct when load is in Output high impedance (much larger than 50 Ω) .

  • Page 7: Frequency

    Staircase Maximum Frequency Error Maximum frequency error depends on sample clock and phase accumulator size. For FG085 the phase accumulator size is 24 bits. Two sampling clocks, 2.5Msps and 10Ksps, are used. Sample clock is automatically selected based on frequency setting as shown in the table below.

  • Page 8: Amplitude

    |Vac peak| + |Vdc| ≤ 10 V (into High-Z). D.C. Only The output of the FG085 can be set to a DC level by entering amplitude of 0V. When the amplitude is set to zero the A.C. waveform will be completely shut off and the FG085 may be used as a DC voltage source.

  • Page 9: Trigger Function

    Trigger waveform Frequency Sweeping Mode In this mode FG085 generate frequency sweeping signals. The sweeping range and rate as well as signal amplitude and DC offset are all independently set by user. Screen...
  • Page 10 DN085-01v06 Waveform Selection Waveform selection is done by pressing [WF] key. Normal sweeping Bi-directional sweeping JYE Tech - 10 - www.jyetech.com...

  • Page 11: Range And Rate

    When Sweep Time is less than Time Step Size the actual sweep time becomes 2 * (Time Step Size). Frequency sweeping in this case is degraded to outputting start and stop frequency alternatively. This creates an effect of FSK. JYE Tech - 11 - www.jyetech.com...

  • Page 12: Sweep Direction

    Normally frequency sweeping is from start frequency (Fstart) to stop frequency (Fstop). This is called Normal Sweeping. For FG085 the sweep can be set to two way sweeping, i.e. it sweeps from Fstart to Fstop, and then from Fstop back to Fstart.

  • Page 13: Servo Position Mode

    The first screen shows pulse width in unit of microsecond. The second shows pulse amplitude in unit of volt. Pressing [F/T] will display the pulse width screen and pressing [AMP] will display the amplitude screen. JYE Tech - 13 - www.jyetech.com...

  • Page 14: Pulse Width And

    At either pulse width screen or amplitude screen user can turn [ADJ] to incrementally change pulse width or amplitude. The Decrement step size of incremental change for pulse width is defined by SV.PWinc, another setting that can be modified by user (see below). JYE Tech - 14 - www.jyetech.com...

  • Page 15: Servo Signal Settings

    When a setting is set to a value out of acceptable range the instrument behaviour is not defined. Servo Run Mode In this mode the generator outputs servo control signal with changing pulse width. The pulse width change step, rate, and range are user settable. JYE Tech - 15 - www.jyetech.com...

  • Page 16: States

    Please refer to paragraph titled “Servo Signal Settings” above for details. Arbitrary Waveform Generation (AWG) With firmware version 113-08501-130 (for U5) and 113-08502-050 (for U6) FG085 is capable of generating arbitrary waveforms defined by user. How It works FG085 has an EEPROM user waveform buffer in U5.

  • Page 17: Define Waveform File

    (comma separated value) format, which can be opened and edited by many spreadsheet applications and text editors. A waveform template file has been provided at JYE Tech web site. Based on the template users can use any text editor to create their own waveform files easily and quickly.

  • Page 18: Waveform Download

    For programming header pin-out please refer to tables under section “Connectors”. If the programming header you have has a different pin-out. You need to re-route the signals to make them match. (JYE Tech’s USB AVR Programmer [PN: 07302] is ideal for FG085 programming. Please visit www.jyetech.com...

  • Page 19: Technical Support

    Extended Fuse Byte: 0b00000001 ( 0x01 ) High Fuse Byte: 0b11010110 ( 0xD6 ) Low Fuse Byte: 0b11100000 ( 0xE0 ) 6. Technical Support For any technical issues or questions in using the instrument please contact JYE Tech at support@jyetech.com. post your...

  • Page 20: Revision History

    < 150mA (without loading) Current Consumption 155mm X 55mm Circuit Board Size Revision History Version Date Summary 2013.03.19 Updates to reflect new features in firmware 113-08501-130 2013.06.23 Corrected mistake in the description for waveform download frame structure. JYE Tech - 20 - www.jyetech.com...

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