Tektronix 1705A instruction manual Error Cannot Read or Write Press Input KEY to Exit

Maintenance

ERROR : CANNOT READ OR WRITE

TO 2444

PRESS [INPUT] KEY TO EXIT

Figure 6-4: 1705A power up error message

When this message is displayed, any subsequent measurements (if possible) must be considered suspect.

DAC Test The DAC test is used to test the readout capability, crt geometry and focus, and provides a convenient method of determining if Trace Rotation needs to be adjusted.

Figure 6-5 shows the waveform superimposed over the crt graticule to demon- strate its value as an adjustment tool. The DAC test is selected, from the Test Auxiliary menu, by pushing the 1705A RESOLUTION push button. The test in progress is exited any time the INPUT push button is pushed.

1705A Spectrum Monitor 6- 7