Tektronix 1705A User Manual
Page 132
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Maintenance
1705A Spectrum Monitor
6- 7
PRESS [INPUT] KEY TO EXIT
ERROR : CANNOT READ OR WRITE
TO 2444
Figure 6-4: 1705A power up error message
When this message is displayed, any subsequent measurements (if possible)
must be considered suspect.
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.
DAC Test
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