HP 8648 A/B/C/D - Changpuak.ch

FSK Deviation Accuracy Performance Test (Option 1EP Only)
Configure the
HP 86488
Option 1EP
8.32 Performance Tests
Measure FSK
Deviation
1. Set the frequency, press: (FREQUENCY) (155_) (MHz).
2. Set the amplitude, press: [AMPLITUDE) @ (Ti&iJJ.
3. Set the FSK deviation, press: (FM (4.8) (kHz).
4. Turn the RF output on, press: (j-ON/OFF).
5. Set FORMAT to SERVICE; rotate the AMPLITUDE/ENCODER knob
until FORMAT SERVICE appears.
6. Set the FSK mode, press: (iJJ (NEXT) and rotate the
AMPLITUDE/ENCODER knob until CALIBRATION FSK 1200/2
appears.
7. Turn the encoder on, press: (INCR] (START/STOP).
1. Set the HP 8648 frequencies and FSK modes shown in Table 8-2.
2. Set the HP 89441A symbol rate and frequency span as shown in
the table.
3. Restart the measurement, press: CMMUW Restart).
4. Read the FSK deviation value at each symbol by using marker
function, press: (Marker @iJ (or 0, 0, . . . @) sym .
5. Record the marker value in the second column of the table.
6. Calculate the deviation error for each symbol by subtracting the
desired deviation value from each marker value. Record them in
the fourth column of the table.
7. Calculate the deviation error average and record it in the table.
8. Repeat this measurement for the rest of the carrier frequencies and
FSK modes listed in ‘lhble 8-2.
9. Record the test results and compare the results to the limits in the
test record.