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

FSK Deviation
Accuracy
Performance Tkst
(Option 1EP Only)
Connect the Test
Equipment VECTOR 10 MHz E Xl
S I GNAL ANALYZER REF INPU T
INPUT
?EF
IO MHz HP 8648
OUTPUT UNDER TEST
000~0000 00000000 0
0 8EDBB88:: 8 0
88BXXZZ 0 B rT
I I
RF
OUTPUl
Figure S-21. FSK Deviation Accuracy Equipment Setup
Configure the Vector 1. Set the instrument mode; press:
Signal Analyzer unstrument Mode) Digital Demodulation
8-30 Performance Tests
on65abc
demodulation setup demod format FSK 2 (or FSK 4)(jj]
symbol rate 11.2)(ora)kHz
result length Ilo] sym
meas filter Low Pass (Return]
ref filter rect IReturn)
more normalize off
Note The symbol rate must be set to 1.2 kHz for 1200/2 FSK and 3.2 kHz
for 6400/4 FSK.
2. Set the display mode, press: (j-1 4 grids quad