SSB phase noise

Test procedure

UUT

 

Signal generator

RF OUT

 

 

 

 

RF OUTPUT

RF

Measuring

LO

 

receiver

 

 

 

C2563

Fig. 5-6 SSB phase noise test set-up

(1)Connect the test equipment as shown in Fig. 5-6.

(2)On the UUT set:

Carr Freq

470 MHz

RF Level

0 dBm

(3)On the measuring receiver:

Tune the receiver to 470 MHz.

Select 24.0 SPCL to enter selective power measurement mode.

Select 23.1 SPCL to set the LO to external.

(4)Set the signal generator to a carrier frequency of 470.455 MHz, RF level 0 dBm.

(5)On the measuring receiver:

Select 24.5 SPCL to establish the IF reference value (in volts).

Select 24.6 SPCL to set the reference to 0 dBm.

(6)Fine tune the signal generator frequency until a maximum value is displayed on the measuring receiver.

(7)Offset the signal generator by 20 kHz.

(8)On the measuring receiver:

Select 24.7 SPCL to normalize the measurement for a 1 Hz bandwidth.

(9)Offset the signal generator by 20 kHz.

(10)Measure the level on the receiver (the SSB phase noise in a 1 Hz bandwidth) checking that the result is within the specification shown in Table 5-21.

5-9

Page 84
Image 84
VXI 3002 manual SSB phase noise test set-up