1.10 MHz Reference Output Accuracy, HP 8590 EM-Series

1.Connect the equipment as shown in Figure 2-1.

2.Set the frequency counter controls as follows:

SAMPLE RATE :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: : Midrange

50￿/1 ￿ SWITCH : ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: 50 ￿

10Hz-500 MHz/500 MHz-26.5 GHz SWITCH : ::: :: :: :: :: ::: :: 10 Hz-500 MHz FREQUENCY STANDARD (Rear panel) : :: :: :: ::: :: :: :: :: ::: :: :: EXTERNAL

3.Wait for the frequency counter reading to stabilize. Record the frequency counter reading in the 10 MHz Reference Accuracy Worksheet as Counter Reading 1.

4.Set the EMC analyzer by pressing the following keys:

4FREQUENCY5 037 4Hz5

4CAL5 More 1 of 4 More 2 of 4 VERIFY TIMEBASE

5.Record the number in the active function block of the EMC analyzer in the 10 MHz Reference Accuracy Worksheet as the Timebase DAC Setting.

6.Add one to the Timebase DAC Setting recorded in step 5, then enter this number using the DATA keys on the EMC analyzer.

For example, if the timebase DAC setting is 105, press 1,0,6 4Hz5.

7.Wait for the frequency counter reading to stabilize. Record the frequency counter reading in the 10 MHz Reference Accuracy Worksheet as Counter Reading 2.

8.Subtract one from the Timebase DAC Setting recorded in step 5, then enter this number using the DATA keys on the EMC analyzer.

For example, if the timebase DAC setting is 105, press 1, 0, 4, 4Hz5.

9.Wait for the frequency counter reading to stabilize. Record the frequency counter reading in the 10 MHz Reference Accuracy Worksheet as Counter Reading 3.

Performance Veri￿cation Tests 2-3