Acquisition parameters & technical specifications

 


 

 

JEA24

JEA247

 

 new generation

A/D

Resolution real

24 bit using Delta-Sigma A/D converter 

24 bit using Delta-Sigma A/D converter 

Available Channels

12,24,36,48,96, up to 240

12,24,36,48,96, up to 240

Number of sample/trace

256,512,1024,2048,4096,8192

256, 512, 1024, 2048, 4096, 8192

16384, 32768, 65536, 131072

Sample rate (msec)

250, 500, 1000, 2000, 4000, 8000,

 16000, 32000

 as per  JEA 24 + 64000

Avaraging

Always sampling at 32 KHz

then avaraging for noise reduction

 Always sampling at 32 KHz

then avaraging for noise reduction

Sampling interval

 

From 0,03125 ms up to 32 sec

From 0,03125 ms up to 32 sec up to 65 sec at 4 KHz

Frequence response

1,85 Hz to 4000 Hz

for this application 

1,85 Hz  to 20 KHz 

Delay Time

 

up to 8K samples

up to 8K samples

Input Gain Remotely software selectable

0 db, 6 db, 12db, 18db

 up to 60 db

Time standard Accuracy

0,005%

0.005%

Gain Accuracy

+/- 0,2%

+/- 0,2%

Input Impedence

Matched to sensor

Matched to sensor

Cross talk

not evaluable

not evaluable

Max input signal

+/- 2V at 0 db gain

+/- 2V at 0 db gain

 Anti alias filter

 4 KHz 6 db/octave

 4 KHz 6 db/octave

 Digital filter

 Low Pass, Hight Pass Band Pass Multiple

(LC-HC Automatic gain

  Low Pass, Hight Pass Band Pass Multiple (LC-HC Automatic gain

 Notch

 50Hz - 60 Hz

 50Hz - 60 Hz

 Nyquist frequency

 16 KHz

 16 KHz

 Dinamic Resolution

 117 db

147 db 

 Crossfeed isolation

 100db

 100db

 THD noise

 Less 97 db

 Less 97 db

 Recording Format

 root xxxx1000.SU exension

es: best1000.SU & SEGY

 root xxxx1000.SU exension es: best1000.SU & SEGY

 Input protection

 Analog filter & diode

 Analog filter & diode

 Operating temperature

 0°- 50°

 0°- 50°

 Power Supply

 24 V Gel Battery  MOM Unit

 12 V Gel Battery

MOM Unit

 Connectors

 DLG 8

 DLG 7

 PC Port

 USB 1.0

 USB 1.0

 Baud Rate

 800.000 bit/sec

 12 Mb/sec

 

 Triggering

 Contact closure + on JEA board

 Contact closure +/- TTL on JEA board

 System, Software

 Runs under Windows XP -

Vista operating system

 JEA Panel Acq.

 Runs under Windows XP - Vista operating system JEA Panel Acq.

 Warranty

 3 years

 3 years

 

Display True Amplitude - Normal -

Average Trace Equalization-

Noise monitor - triggering - zoom - reset - reverse polarity

 

 Display True Amplitude - Normal -

Average Trace Equalization-

Noise monitor - triggering - zoom - reset - reverse polarity

 

Specifications are subject to change following

DOLANG Geophysical Production