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

Note
FSK Deviation Accuracy Performance Test (Option 1EP Only)
3. Set each channel trace mode:
Channel Measurement Data
FSK measured time
FSK error time
FSK measured time
symbol table/error summary
4. Set the average mode, press: (jjj average off
@i4ixG]
polar (IQ> vector
magnitude linear
eye diagram I
5. Set the frequency span (the frequency span must be set to 20 kHz
for 1200/2 FSK and 50 kHz for 6400/4 FSK), press:
(frequencd center @ MHz , Ispan] (20) (or (50)) kHz
6. Set the time mode, press:
ITimel result length [loll sym
sync search on sync setup+ pattern (01) enter (Return)
points/symbol (20) enter
7. Set the trigger mode to single mode, press: C-1
8. Display the status, press: (JView] measurement state
The status should look like the following:
Inst Digital Demodulation Channels 1
Mode Meas from input Receiver RF 2650 MHz
Format 2 FSK Rate 1.2 kHz
Alpha ---- Meas filter Low Pass
Normalize off Ref filter rect
Clk Adj 0 sym
Freq Span 20 kHz Center 155 MHz
Bw/Win Rbw 300 kHz Window flat top
Time Puls-srch off Sync-srch on
pts/sym 20 Srch ----- ms
Result 100 sym Sync offset 0 sym
Sync word 01
Average Status off Num averages ---
Type --- Repeat avg ---
Overlap ---% Fast avg ---
The field indicated as “----” may be any value or automatically set.
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Performance Tests 8-3 1