EXPHIL EXPRESS

(800) 282-5632
instek analog scopes  
GDS-820 / GDS-840 Series
Digital Storage Oscilloscopes 

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 Instek GDS-800 Series Digital Scopes.....Up To 250 MHz,  125K Memory Depth
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Lowest Price.......SAVE at least 10% on all Instek Products.... Call Now.....800-282-5632

Compare Our Price / Performance to the Tektronix TDS1000,  TDS2000 Series !!

 

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  • 150MHz / 250MHz Bandwidth with either Color or Monochrome LCD Display
  • 125K Memory and 12 Division Horizontal Display
  • 25GS/s Sampling Rate for Repetitive Waveforms 
  • 15 Auto Measurement Functions
  • Advance Trigger: Pulse Width, TV-Line, Event Delay and Time Delay
  • Go No/Go, Learn Mode and Auto Setup Sequence
  • FFT Function
  • Standard Interfaces: USB, RS232, Printer Port           Optional: GPIB Interface

 

 

  Selection Guide.....
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Model Bandwidth Sample Rate Display I/O
GDS-840C 250 MHz 100 MS/s (ETS: 25GS/s) COLOR 5.7" LCD (320 x 240) RS232,  Printer Port,  USB,  Optional GPIB
GDS-840S 250 MHz 100 MS/s (ETS: 25GS/s) Mono 5.7" LCD (320 x 240) RS232,  Printer Port,  USB,  Optional GPIB
GDS-820C 150 MHz 100 MS/s (ETS: 25GS/s) COLOR 5.7" LCD (320 x 240) RS232,  Printer Port,  USB,  Optional GPIB
GDS-820S 150 MHz 100 MS/s (ETS: 25GS/s) Mono 5.7" LCD (320 x 240) RS232,  Printer Port,  USB,  Optional GPIB
GDS-820 150 MHz 100 MS/s (ETS: 25GS/s) Mono 5.7" LCD (320 x 240) No

 

  Specifications.....
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Display System

 
Display Device

GDS-820

GDS-820S

GDS-820C

GDS-840S

GDS-840C
Mono
5.7" LCD		 Mono
5.7" LCD		 COLOR
5.7" LCD		 Mono
5.7" LCD		 COLOR
5.7" LCD
Display Contrast
Adjustable
Waveform Display Graticule
8 x 10 divisions (8 x 12 div, when menu off)
Display Mode
Dot, Vector, Accumulate

Vertical System

 
Bandwidth (-3dB)

GDS-820

GDS-820S

GDS-820C

GDS-840S

GDS-840C
DC~150MHz
DC~150MHz
DC~150MHz
DC~250MHz
DC~250MHz
Channels
2
Resolution
8 bit
Sensitivity
2mV / DIV ~ 5V / DIV
Accuracy
+3%
Rise Time

GDS-820

GDS-820S

GDS-820C

GDS-840S

GDS-840C
<2.3ns
<2.3ns
<2.3ns
<1.4ns
<1.4ns
Input Coupling
AC, DC, GND
Input Impedance
1MΩ + 2%, ~ 22pF
Polarity
Positive& Negative
Maximum Voltage Between Signal and Common at input BNC
300V (DC + AC peak), CAT II
Waveform Signal Process
CH1-CH2, CH1+CH2, FFT
Offset Range
2mV/div ~ 50mV/div: ±0.5V ; 100mV/div ~ 500mV/div: ±5V ; 1V/div ~ 5V/div: ±50V
Bandwidth Limit
20MHz (-3dB)

Horizontal System

 
Range
1nS/DIV ~10S / DIV ; Roll: 250mS/DIV ~ 10S/DIV (1-2-5 increments)
Modes
MAIN, WINDOW, WINDOW ZOOM, ROLL, X-Y
Accuracy
+0.01%
Delay Range
Pre-trigger : 20 DIV, Post-trigger : 1000 DIV

Signal Acquisition System
Real-time Sample Rate
100MSa/s maximum on each channel
Equivalent Sample Rate
25GSa/s maximum on each channel
Record Length
125k / CH
Peak Detection
10nS (500nS/DIV ~ 10S/DIV)
Acquisition Mode
Sample, Peak Detect, Average
Average
2, 4, 8, 16, 32, 64, 128, 256

Trigger System

  
Source
CH1, CH2, LINE, EXT
Modes
AUTO-LEVEL, AUTO, NORMAL, SINGLE, TV, TIME DELAY, /EVENT DELAY, EDGE, PULSE WIDTH
Coupling
AC, DC, LF rej, HF rej, Noise rej
Sensitivity

GDS-820

GDS-820S

GDS-820C

GDS-840S

GDS-840C
DC ~ 25MHz : approx. 0.35 DIV or 3.5mV ;
25MHz ~ 100MHz : approx. 1.5 DIV or 15mV
DC ~ 25MHz : approx. 0.35 DIV or 3.5mV ;
25MHz ~ 250MHz : approx. 1.5 DIV or 10mV

External Trigger

  
Range
+15V
Sensitivity

GDS-820

GDS-820S

GDS-820C

GDS-840S

GDS-840C
DC ~ 30MHz : approx. 50mV ;
30MHz ~ 100MHz : approx. 100mV
DC ~ 30MHz : approx. 50mV ;
30MHz ~ 100MHz : approx. 100mV;
150MHz 100MHz ~ 250MHz : approx. 150mV
Input Impedance
1MΩ + 2%, ~ 22pF
Maximum Input
300V (DC + AC peak), CAT II

X-Y Mode

  
X-Axis Input / Y-Axis Input
Channel 1 (CH1) / Channel 2 (CH2)
Phase Shift
+3° at 100kHz

Cursor & Measurement

  
Automated Voltage Measurement
Vhi, Vlo, Vmax, Vmin, Vpp, Vavg, Vrms, Vamp
Automated Time Measurement
Rise Time, Fall Time, Duty Cycle, Frequency, Period, Positive Width, Negative Width
Cursor Measurement
Voltage difference between cursors (ΔV)
time difference between cursors (ΔT)
Frequency difference between cursors (1/ΔT)

Frequency Counter

 
Readout Resolution
6 digits
Range
AC Coupled, 10Hz minimum to rated bandwidth
Signal Source
All available trigger source except the Pulse Width & Video Trigger mode
Control Panel Functions  
Autoset
"Autoset" adjust vertical (volt/DIV), horizontal (sec/DIV), and trigger level automatically
Save/Recall
Up to 15 sets of measurement conditions can be saved and recalled
Waveform Trace Save/Recall
2 sets of waveform can be saved and recalled
Interface    

USB Interface

GDS-820

GDS-820S

GDS-820C

GDS-840S

GDS-840C
NA
STD.
STD.
STD.
STD.
RS-232 Interface
NA
STD.
STD.
STD.
STD.
Printer port
NA
STD.
STD.
STD.
STD.
Go-No Go Output
NA
STD.
STD.
STD.
STD.
GPIB Interface
NA
OPT.
OPT.
OPT.
OPT.
Power Source    
Line Voltage Range
100V ~ 240V AC, automatic selection
Line Frequency
48Hz ~ 63Hz
Power Consumption
85Watts, 95VA maximum, with fan
Accessories
Power cord x 1 ;
Instruction manual x 1 ;
GDS-820 Series: GTP-150A Probes(10:1/1:1) x 2
GDS-840 Series: GTP-250A Probes(10:1/1:1) x 2
 
Dimensions & Weight
254(W) x 142(H) x 310(D) mm, Approx. 4.1kg

 

 

 

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  Ordering Information.....
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GDS-820    150 MHz DSO, No I/O Ports, Mono Display $995.00*
GDS-820S    150 MHz DSO, RS232, Centronics, USB, Mono Display $1,095.00*
GDS-820C    150 MHz DSO, RS232, Centronics, USB, COLOR Display $1,295.00*
GDS-840S    250 MHz DSO, RS232, Centronics, USB, Mono Display $1,595.00*
GDS-840C    250 MHz DSO, RS232, Centronics, USB, COLOR Display $1,895.00*
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* When placing your order,  be sure to ask for your INTERNET DISCOUNT

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