Download
Share
Print this page
  1. Manuals
  2. Brands
  3. Thurlby Manuals
  4. Receiver
  5. DSA524
  6. Operating manual

Thurlby DSA524 Operating Manual

Digital storage adaptor
Hide thumbs Also See for DSA524:

Advertisement

Quick Links

Download this manual
Thurlby DSA524
digital storage adaptor
OPERATING MANUAL AND TUTORIAL
V2.0

Advertisement

loading
Need help?

Need help?

Do you have a question about the DSA524 and is the answer not in the manual?

Questions and answers

Related Manuals for Thurlby DSA524

Summary of Contents for Thurlby DSA524

  • Page 1 Thurlby DSA524 digital storage adaptor OPERATING MANUAL AND TUTORIAL V2.0...
  • Page 2 The firmware level is displayed briefly whenever the unit is examples of how functions operate). first switched on (and when SET 'SCOPE is used) as DSA524 The Appendices provide additional detail on some of the more X.XX, where X.XX is the firmware level.
  • Page 3 R2. SETTING UP THE OSCILLOSCOPE DISPLAY The main effect of RESET is to set up the unit as follows:- Switch on the DSA524 (the power switch is at the rear) and wait RUN /HOLD RUN.
  • Page 4 The digitising memories are non- lamps. volatile i.e. their contents are not destroyed when the power is When CH1 and CH2 are ON simultaneously the DSA524 uses a turned off. single high speed digitiser to digitise both signals. For timebase...
  • Page 5 (PRE TRIGGER DELAY). The DSA524 can display two traces simultaneously, the traces are called A and B. Each trace has its own 1K word memory POST — this acts similarly to sweep delay on a which can be loaded with data either from the corresponding real-time oscilloscope.
  • Page 6 Pressing SEARCH cycles through three states as detailed below. The actual mode is The DSA524 has sixteen 1K word memories for temporary or indicated both by a corresponding front panel lamp and by a permanent storage of waveforms.
  • Page 7 R15. REPEAT MODE OPERATION "NEXT POSITION = NN + 1". To store another front panel set- In normal mode the DSA524 can digitise a waveform at up to ting, reset the front panel as required and press the SET/NEXT 20MS /s digitising rate, equivalent to 5usecs per division. If the key again.
  • Page 8 R18. SINE INTERPOLATION The AxB function cannot operate while digitising is taking place. Pressing the AxB key will set RUN/HOLD to HOLD. The function When the display mode is set to MAG (magnify) the number of multiplies the traces exactly as they appear at the moment that true samples shown across the screen is reduced to 102.
  • Page 9 Appendix F. ‘Software Commands’. Select Digital Plotter Routine Set Baud Rate R25. RS-423 INTERFACE The DSA524 is fitted with an RS-423 serial interface which is fully 1200 compatible with equipment fitted with an RS-232C interface. It 2400 can be used for remote control of the DSA, for bidirectional data 4800 transfers and for connection to a printer or a digital plotter.
  • Page 10 USERS TUTORIAL The sophisticated facilities of the DSA524 have resulted in a fairly complex instrument. This "hands-on" tutorial takes the user through most of the functions of the unit step by step, and provides an easy method of gaining familiarity with its operation.
  • Page 11 Zero or minimum Connect the main output of the function generator to the The front panel of the DSA524 is completely "cold", that is to CH1 input of the DSA. Connect the Sync or TTL output to say that there are no direct links between the front panel and CH2.
  • Page 12 5V pk-pk.) roughly sinusoidal but is made up of only 10 samples per The DSA524 can display two traces simultaneously, the traces are cycle. called Trace A and Trace B. Whereas the input channel controls...
  • Page 13 Press simul- 5V pk-pk.) taneously the two keys marked AUTOSET within the The trigger controls for the DSA524 are broadly similar to those timebase section, note that the timebase is automatically on a conventional oscilloscope. The exceptions are EVENTS DLY set to 20us/div.
  • Page 14 3 seconds. system employed in the DSA524 when SINGLE is used. Try moving the magnify window backwards and Set the generator frequency to 2Hz and the DSA timebase forwards using the two arrow keys.
  • Page 15 5V pk-pk.) Indexed Waveform Memories The DSA524 can average any number of readings from 2 up to 255, enabling large improvements to be made to the signal to (Start with the DSA reset and the generator set to SINE, 20kHz, noise ratio of noisy signals.
  • Page 16 Press SET/NEXT, the per cycle is less than ten. The DSA524 provides the alternative of screen will show "STORED IN MEM = 31" followed by sine interpolation which provides a good reconstruction of a "NEXT POSITION = 32".

  • Page 17: Appendix A. The Oscilloscope Display

    Clearly this is not possible with a single-shot line. waveform. The horizontal timing of the DSA524 is crystal controlled to an In theory a single-shot waveform can only be perfectly recon- accuracy of 0.01% (except for "repeat" mode operation) and structed using an infinite sampling frequency.

  • Page 18: Appendix D. Analog Plotter "Plot" Function

    0.1 divisions on the display, it will be necessary to 10.24. When plotting has finished the display will show "PEN use "magnify" mode to view it properly. When the DSA524 UP/HIT ANY KEY". The pen lift signal will be set to "up". If display mode is set to MAG it not only increases the spacing automatic pen lift control is not being used, raise the pen.

  • Page 19: Appendix E. Connecting To The Serial Interface

    bytes for a "print") the baud rate needs to be kept high to mini- APPENDIX E. CONNECTING TO THE SERIAL INTERFACE mise transmission time. Since the device is unlikely to have a The interface uses a female 9-pin D connector and has five active buffer large enough to accept the data in one stream, hand- connections: pin 2 (RXD) is the data input line, pin (TXD) is the shaking will almost certainly be needed.
  • Page 20 For CH1 or CH2 the secondary commands are as follows: SROFF (This turns any of the SEARCH modes off). 2mV, 5mV, 10mV, 20mV, 50mV, 100mV, 200mV, 500mV, 1V, NORM, SLOW or FAST (This sets the display update rate). 2V, 5V, or 10V (This sets the input sensitivity.) ION or IOFF (This sets sine interpolation on or off).

  • Page 21: Text,String

    This causes the DSA to send back an identity This sets Run/Hold to Run, enabling continuously string which includes the firmware level, e.g. repeating acquisitions. DSA524 V2.67 HOLD This sets Run/Hold to Hold, freezing the digitising BEEP This causes the audio transducer on the DSA memories.
  • Page 22 S1. DSA524 TECHNICAL SPECIFICATIONS VERTICAL INPUT AMPLIFIERS OSCILLOSCOPE DISPLAY SYSTEM Trace A Displays 1024 words from either CH1 or Number of any indexed waveform storage memory. channels Trace B Displays 1024 words from either CH2 or Bandwidth DC to 35MHz (10V/div to 20mV/div).
  • Page 23 S6. UPDATING THE FIRMWARE From time to time small revisions may be made to the firmware of the DSA524 (the firmware is the ROM based program code for the unit). The firmware level is displayed briefly whenever the unit is first switched on (and when SET 'SCOPE is used) as DSA524 X.XX, where X.XX is the firmware level.
  • Page 24 Thurlby Electronics Ltd New Road/Burrel Road, St. Ives Huntingdon, Cambs. England Telephone: (0480) 63570, Fax (0480) 64832, Telex: 32475...