JKGEN

  • You want to test your DAC or other digital audio equipment?

  • You don't want to use computer, due to a noise, ground loops, space?

  • You need the mains or the battery operated device?

JKGEN - is for you!

Digital function generator with SPDIF, TOSLINK, DSD and I2S outputs.

Now - with DSD!

Low Frequency Digital Audio Signal Generator JKG 384-12

The main advantage of this device is I2S, SPDIF and TOSLINK, 15 signal shapes generation, DSD Modes.

Also with the regular analog signals.

Target application: DAC and other digital and analogue audio system research, development, debug and repair.

Discontinued, a new version is JKGEN-2!

Main features:

  • Digital coaxial SPDIF output (with galvanic isolation)

  • Digital CMOS-level SPDIF output

  • Digital optical TOSLINK output

  • Digital I2S output:

    • Philips I2S

    • Left Justify

    • Right Justify 24bit

    • Right Justify 16bit

  • 2 Channel Analog outputs

  • 16, 24, 32 bit at I2S output

  • 44.1, 48, 88.2, 96, 176.4, 192 kHz Fs at all digital outputs

  • Additionally - 352.8 and 384kHz at I2S output.

  • 1mHz - 100kHz generated frequency

  • 15 signal shapes

  • Audio Clock:

    • Internal low jitter 512*Fs clock

    • External 512*Fs or 1024*Fs clock

    • Output digital level control: 0..-20dB 1dB step, -20..-90dB 10dB step

  • Channel control:

    • Left and Righ in phase,

    • Left and Righ out of phase (180deg.)

    • Left and Righ orthogonal (90deg.),

    • Left, Right, Mute.

  • 8 user's setups, stored in flash memory.

  • TFT Display and "one knob" encoder control

  • Easy firmware upgrade using USB Disc-On-Key.

  • 6-9VDC input voltage:

    • from mains (wall adapter)

    • 6V Lead-Acid Battery

    • 7.2V Li-Ion Battery

  • +5VDC, 100mA max at I2S output connector, for auxiliary devices.

  • Less then 3W power consumption.

Generated Signals:

PCM Mode:

Signal shapes:

  • SIN Wave

  • SIN Bursts

  • SIN Sweep

  • Triangle

  • Square

  • Saw

  • 2 tone IMD test signals:

  • White Noise

  • Pink Noise

  • Constant Value

  • Digital Zero

  • JTest

    • Impulse Test

    • CrossSample Test

    • Sine Squared Signal

Frequency:

SIN, Triangle, Saw and Square wave can be variable (0.1-99999.9 Hz) frequencies or fixed in two ranges:

Normal Range:

0.1, 1, 5, 10, 20, 50, 100, 200, 500, 1000 Hz,

5, 10, 15, 20, 30, 40, 50, 60, 100 kHz.

Low Frequency Range:

1, 10, 50, 100, 200, 500, 1000 mHz,

2, 5, 10, 50, 100, 150, 200, 300, 400, 500, 600, 1000 Hz.

IMD Test Signals:

  • 60/7000 Hz, 4:1 ampl.

  • 250/8020 Hz, 4:1 ampl

  • 6000/7000 Hz, 1:1 ampl

  • 19000/20000 Hz, 1:1 ampl

DSD Mode:

DSD Bus (L-Data, R-Data, Clock) signal generation in 64x mode.

DSD Over PCM (DoP) protocol generation at I2S bus (LJ or I2S format).

DSD Signal shapes:

  • SIN Wave (441, 1002, 11025, 22050 and 44100 Hz)

  • Triangle

  • Square Wave

  • Digital Zero

  • Constant Value

User Manual

Technical Parameters:

* - clock manufacturer data.

7 things, making this device better then PC with a sound card:


  1. Not everyone PC's sound card have SPDIF/TOSLINK outputs.

  2. Not everyone PC's sound card have I2S output

  3. Not everyone PC's sound card have external MCLK input

  4. JKG 384-12 is much smaller then desktop PC

  5. JKG 384-12 have less surrounding cables, then desktop or laptop with external sound card

  6. JKG 384-12 can be powered from the battery, allowing "on field operation"

  7. JKG 384-12 can be powered from the battery, avoiding the ground loops

See complete descriptions, technical documents, firmware upgrades at download page, prices - at the shop page.

Please, read the ERRATA document!