14. Reference Level Accuracy, HP 8591EM

Procedure

Log Scale

1. Set the synthesizer/level generator controls as follows:

FREQUENCY :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: : 50 MHz

AMPLITUDE : :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: : 010 dBm

AMPTD INCR :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: 10 dB

OUTPUT :: :: ::: :: :: :: :: ::: :: :: :: ::: :: :: :: ::: :: :: :: :: ::: :: :: :: ::: 50 ￿

2.Connect the equipment as shown in Figure 2-17. Set the 10 dB step attenuator to 10 dB attenuation and the 1 dB step attenuator to 0 dB attenuation.

3.Press 4PRESET5 on the EMC analyzer, then wait for the preset routine to ￿nish. Set the EMC analyzer by pressing the following keys:

4FREQUENCY5 50 4MHz5

4SPAN5 10 4MHz5

4MKR !5 MARKER ! HIGH

4

MKR

5 More

1 of 3 MK TRACK

ON

OFF

(ON)

4

 

 

5 50 4

 

 

5

 

 

 

 

 

 

 

 

 

SPAN

kHz

 

 

 

 

 

 

 

4

 

 

 

 

5

87 4

 

5 SCALE

LOG

LIN

(LOG) 1 4

 

5

AMPLITUDE

+dB￿V

dB

4

 

5 3 4

 

5

AVG BW AUTO MAN

(MAN) 30 4

 

5

BW

kHz

Hz

4.Set the 1 dB step attenuator to place the signal peak one to two dB (one to two divisions) below the reference level.

5.On the EMC analyzer, press the following keys:

4SGL SWP5

4MKR !5 MARKER ! HIGH More 1 of 3 More 2 of 3 MARKER 1

6.Set the synthesizer/level generator amplitude and EMC analyzer reference level according to Table 2-11. At each setting, press 4SGL SWP5 on the EMC analyzer.

7.Record the MKR 1 amplitude reading in the performance veri￿cation test record as indicated in Table 2-11. The MKR 1 reading should be within the limits shown.

Performance Veri￿cation Tests 2-71