4. Frequency Readout and Marker Count Accuracy, HP 8591EM and HP 8594EM

Part 1: Frequency Readout A ccuracy

1.Connect the equipment as shown in Figure 2-4. Remember to connect the 10 MHz REF OUT of the synthesized sweeper to the EXT REF IN of the EMC analyzer.

2.Perform the following steps to set up the equipment:

Press INSTRUMENT PRESET on the synthesized sweeper, then set the controls as follows:

CW :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: : 1.5 GHz

POWER LEVEL ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: :: 010 dBm

On the EMC analyzer, press 4PRESET5, wait for the preset routine to ￿nish, then press 4FREQUENCY5 1.5 4GHz5.

3.Set the EMC analyzer to measure the frequency readout accuracy by pressing the following keys:

4SPAN5 20 4MHz5

4MKR !5 MARKER ! HIGH

4.Record the MKR frequency reading as TR Entry 1 in the performance veri￿cation test record. The reading should be within the limits shown in Table 2-1.

5.Change to the next EMC analyzer span setting listed in Table 2-1.

6.Repeat steps 3 through 5 for each EMC analyzer span setting/TR entry listed in Table 2-1.

Table 2-1. Frequency Readout Accuracy

EMC Analyzer

MKR Reading

 

 

 

 

Span

Min.

TR Entry

Max.

(MHz)

(MHz)

 

(MHz)

 

 

 

 

20

1.49918

1

1.50082

10

1.49958

2

1.50042

1

1.499968

3

1.500032

 

 

 

 

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

4BW5 IF BW AUTO MAN (MAN) 300 4Hz5

Performance Veri￿cation Tests 2-13