Leader LBO-516 Instruction Manual Download Page 5

 

 

Signal Delay  Leading edge displayed. 

Leading edge displayed. CH-1 only, CH-2 only, 

CH-1 & CH-2 displayed alternately, 

CH-1 & CH-2 chopped (at 250 

   kHz rate), 

CH-1 & CH-2 added, CH-1 & 

   CH-2 subtracted, 

CH-1 & CH-2 & CH-3 displayed 

   alternately, 

CH-1 & CH-2 & CH-3 chopped, 

CH-1 & CH-2 & CH-3 & CH-1 

   + CH-2 alternated,  

CH-1 & CH-2 & CH-3 & CH-1 

   + CH-2 chopped, 

CH-1 & CH-2 & CH-3 & CH-1 

   - CH-2 alternated, 

CH-1 & CH-2 & CH-3 & CH-1 

   -  CH-2 chopped. 

 

Common Mode Rejection  20dB at 20MHz 

CH- 1 Output  25 mV/div into 50 ohms 

 

Horizontal Amplifier (X-Y Mode) 

Bandwidth (- 3 dB) 

DC coupled   DC - 3 MHz 

AC coupled  10Hz - 3MHz 

Rise Time  120 

K

Phase Shift   <3° at 100 kHz 

Deflection Coefficients  0.5 mV/div to 5 V/div in 13 calibrated 

steps, 1-2-5 sequence, continuously 

variable between steps 

Accuracy    +-3% for 5 mV/div to 5 V/div, 

+-5% for 0.5 mV/div to 2 mV/div 

Input Impedance   1 megohm -+2%, 25 pF +-3 pF 

Maximum Input Voltage  400 V (DC plus AC peak) 

 

Time-Base Generators 

Display Modes  Main timebase (TB) only, 

Main TB intensified by delayed 

   TB, 

Delayed timebase, 

Main TB alternated with 

   delayed TB. 

Main (A) Time Base  0.02 

K

S/div to 0.5 S/div in 23 

calibrated steps, 1-2-5 sequence. 

Continuously variable between steps. 

Delayed (B) Time Base  0.2 

P

S/div to 50 mS/div in 20 

calibrated steps, 1-2-5 sequence. 

Magnifier XI0  deflection  increase  at  any  TB 

setting  extends  sweep  speeds  of  main 

and delayed TB's to 2 

K

S/div. 

Accuracy   +- 3% unmagnified 

+- 5% magnified 

Delay Time  Continuously variable multiplier with 

1000 divisions. 

Delayed TB Jitter  1/20,000 

 

 

Trigger Circuits 

Sources   CH-l, CH-2, Alternate, Line, External 

 

 

 

 

 

Modes   Auto, Normal, Single-shot 

Coupling AC, DC, HF reject, TV vertical, TV 

horizontal 

Slope   + or- 

Holdoff   Normal, Variable (to greater than 

one sweep), B ends A 

Sensitivity 

   Internal Trigger  DC – 10 MHz: 0.4div 

10 

100 MHz: 1.5 divs 

   External Trigger  DC - 10MHz: 100mV 

10 - 100 MHz: 400mV 

  

External Trigger Amplifier (Ch. 3) 

 

Bandwidth (-3 dB)  

   DC coupled   DC - 100 MHz 

   AC coupled   10Hz- l00 MHz 
   Rise Time  3.5 

K

   Deflection Coefficients  0.2 V/div and 2 V/div 

   Accuracy  +-3% 

   Input Impedance   1 -2%, 30 pF

   Maximum Input Voltage   400 V (DC plus AC peak) 

 

Z-Axis Modulation 

Level for Blanking   Standard TTL high (+ 2 to + 5V) 

Coupling    DC 

Maximum Input Voltage  50 Vp-p  
Input Impedance   10k

:

 

Bandwidth   DC-5 MHz 

Calibrator

  

Output Voltage  500 m Vp-p--+ 2%, positive-going, 

ground referenced 

Frequency   1 kHz nominal 

Waveform   Fast-rise rectangular wave 

CRT Display 

Phosphor   P31 (P39 optional) 

Accelerating Potential 20 kV/2kV 

Graticule Internal  1  cm  square  divisions,  8  div 

high, 10 div wide. 

Central axis subdivided into 0.2 cm 

graduations. 

Graticule Illumination Continuously variable 

Trace Adjustments on  Rotation, focus, intensity, 

   

Front Panel   B intensity 

Other Features 

"Out-of-Calibration"

  

Main timebase

  

   Indicator 

Other Indicators  Main timebase triggered 

Single-shot ready 

Power on 

Power Requirements 

Line Voltage  100/120/200 VAC 220/240 VAC 

 

Line Frequency  50-60 Hz 

Power Consumption 55W 

 

Physical & Environmental Data 

Case Size (WxHxD) 12.3 x 5.8 x 16 inches 

 305 x 145 x 400 mm 

Overall Size (WxHxD),          13.75 x 7.25 x 18.5 inches 

   handle folded back 350 x 185 x 470 mm  

 

 

 

 

Summary of Contents for LBO-516

Page 1: ......

Page 2: ...INSTRUCTIONS CONTAINED IN THIS MANUAL ARE FOR USE BY QUALIFIED PERSONNEL ONLY TO AVOID ELECTRIC SHOCK DO NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN THE OPERATING INSTRUCTIONS UNLESS YOU A...

Page 3: ...3 1 Signal Connections 9 2 3 2 Single trace Operation 11 2 3 3 Triggering Alternatives 11 2 3 4 Probe Compensation 14 2 3 5 Dual trace Operation 15 2 3 6 Additive and Differential Operation 16 2 3 7...

Page 4: ...timebases to simultaneously sweep the CRT effectively doubles this four trace display to an eight trace display The comprehensive triggering facilities of the LBO 516 include several features that eas...

Page 5: ...0 divisions Delayed TB Jitter 1 20 000 Trigger Circuits Sources CH l CH 2 Alternate Line External Modes Auto Normal Single shot Coupling AC DC HF reject TV vertical TV horizontal Slope or Holdoff Norm...

Page 6: ...Lamp lights when power is on A INTEN control To adjust the overall brightness of the CRT display Clockwise rotation increases brightness B INTEN control Provides adjustment of CRT brightness during IN...

Page 7: ...l For vertically positioning trace 1 on the POSITION control CRT screen Clockwise rotation moves the trace up Inoperative during X Y operation Channel 2 Vertical or For vertically positioning trace 2...

Page 8: ...facilitates precise positioning when Xl0 magnification is used HORIZ DISPLAY To select the sweep mode Switches A push button sweeps the CRT at the main A timebase rate when pressed INTEN BY B push bu...

Page 9: ...ering This trigger mode will also pass and differentiate waveforms in the 2 500 kHz range When triggered B sweep is selected as the horizontal display mode and the COUPLING switch is set to any positi...

Page 10: ...the oscil loscope s primary wiring Cord Caddy Provides a quick method of securing the power cord and supports the oscilloscope for vertical operation Feet Supports the oscilloscope for shelf mounting...

Page 11: ...nt of the instrument tilted upward for straight on viewing Press in the two Handle position Locks and simultaneously rotate the Handle so it points below the case then release the locks If the instrum...

Page 12: ...ire lead coaxial cable and scope probes A simple lead wire may be sufficient when the signal level is high and the source impedance low such as TTL circuitry but is not often used Unshielded wire pick...

Page 13: ...10...

Page 14: ...DC AC peak 4 Set the A TIME DIV switch 24 so the desired number of cycles of signal are displayed For some measurements just 2 or 3 cycles are best for other measurements 50 100 cycles appears like a...

Page 15: ...C voltages The line frequency trigger will sync signal at any reasonable multiple of the power line frequency The 0 2 V DIV and 2 V DIV positions both select external trigger signal applied to the EXT...

Page 16: ...SLOPE switch 39 and the HOLDOFF control 42 The SLOPE switch determines whether the sweep will begin on a positive going or negative going slope of the trigger signal see Figure 2 8 In some cases the c...

Page 17: ...ime between the end of one sweep and the start of the next in response to a trigger pulse This prevents the triggering of subsequent sweeps by the wrong trigger pulse in a complex waveform During norm...

Page 18: ...O 516 since full amplification and attenuation facilities are provided for the two channels As was the case with Single trace Operation you have a choice here too not of channel selection but of how t...

Page 19: ...iv becomes 2 KS div 0 1PS div becomes 01 PS div etc The 2 KS div sweep speed achievable by magnification is fast enough to display a single cycle of a 50 MHz signal across the CRT face 10 If the signa...

Page 20: ...e CH 2 trace on the center graticule line 4 Use the PULL TRIPLE control 22 to set the third trace near the 10 dotted graticule line 5 Connect the signal to be observed to the CH 1 and CH 2 IN connecto...

Page 21: ...0 so 02PS div becomes 2 KS div 8 The CH 2 INV switch 19 can be pushed in to display the difference signal between the CH 1 and CH 2 input signals instead of their sum 9 If your primary reason for sele...

Page 22: ...ayed Sweep 4 Press the ALT HORIZ DISPLAY pushbutton 31 The B timebase trace s will now be displayed below its corres ponding A timebase trace s 5 If necessary adjust the A B TRACE SEP control 33 so th...

Page 23: ...ended for single shot observation of fast transients 3 Press the NORM SWEEP MODE pushbutton 37 set the COUPLING switch 36 to DC and the SOURCE switch 34 to CH 1 4 Adjust the LEVEL control 40 for a sta...

Page 24: ...e peak to peak voltage proceed as follows 1 Set up the LBO 516 for the vertical mode desired per the instructions in 2 3 BASIC OPERATING PROCEDURES 2 Adjust the TIME DIV switch 24 or 25 for two or thr...

Page 25: ...number of divisions from that point to the ground reference line multiplied by the VOLTS DIV setting In the example used for Figure 2 15 the voltage for a 0 5 V div scale is 2 5 V 5 0 div X 0 5 V 7 If...

Page 26: ...onds in this example Pulse width is the distance between points A and B In our example it is conveniently 1 5 divisions so the pulse width is 15 milliseconds However 1 5 divisions is a rather small di...

Page 27: ...ulse width period etc or dual trace measurements lead and lag time The technique after the trace or traces are set up according to the desired procedure is as follows 1 Set the B TIME DIV switch 25 to...

Page 28: ...rrectly compensated probes or equal lengths of the same type of coaxial cable to ensure equal delay times 2 Position the trigger SOURCE selector 34 to the channel with the cleanest and most stable tra...

Page 29: ...DIV control 10 for the largest possible on screen display 6 Precisely center the trace horizontally with the horizontal POSITION control 29 or X FINE control 30 7 Count the number of divisions subten...

Page 30: ...rom its dial The accuracy of this technique depends on the signal generator s calibration accuracy NOTE While many other ratios are theoretically possible drift in either signal frequency makes more c...

Page 31: ...roduce the desired DUT output level 3 Set the CH 1 VOLTS DIV control 10 to the highest setting that produces over 7 divisions trace height 4 Use the CH 1 VARIABLE VOLTS DIV control 11 and CH 1 vertica...

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