Anritsu MG3642A User Manual

SECTION 5   MEASUREMENT

5-10

(1) Setup

Fig. 5-5.  Measuring the 2-signal Selectivity

(2) Measurement procedure

STEP

PROCEDURE

1.

Turn off the output of MG3641A/MG3642A

 2.

2.

Place the frequency, output level, and FM receiver setting of MG3641A/MG3642A

 1  into the 20 dB NQ

sensitivity state.   In this case, the noise level is V

N

 dB.

3.

Turn off the output of MG3641A/MG3642A

 1  and place the frequency and output level of MG3641A/

MG3642A

 2  into the 20 dB NQ sensitivity state.

4.

Turn off the output of MG3641A/MG3642A 

2 again and turn on the output of MG3641A/MG3642A 1.

5.

Place MG3641A/MG3642A 

1 into the relative display level mode and set the output level resolution to 1

dB.

6.

Clockwise turn the rotary knob on the right of MG3641A/MG3642A 

1 to increase the output level of

MG3641A/MG3642A 

1 by 6 dB as compared with the 2 dB NQ sensitivity (set the display of the output

level indicator to +6 dB).

FM RX

DL

LM

(154.45MHz)

FM

receiver

Typical

Pseudo-load

Level 

meter

MG3641A/MG3642A  1  (For desired wave)

2-signal

measure-

ment

pad

MG3641A/MG3642A  2  (For desired wave)