1 Performance Tests
44 Keysight 53210A/53220A/53230A Assembly Level Service Guide
2 With the external reference connected, use the following key sequence to
select (as necessary) the time base source to ‘Auto’ or ‘External’, and the
external reference frequency of 10 MHz:
3 Press the Preset key to preset the counter.
– Display shows:
– Instrument has been preset.
– Ext Ref is shown in the upper right-hand corner of the display.
– The following softkeys are displayed:
4 Press and set:
–Measurement mode: Ad vanced / Auto
The 53210A does not have an Auto measurement mode.
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