John Miles wrote:
The procedure Bruce was describing is basically the jitter test from the
manual, at http://cp.literature.agilent.com/litweb/pdf/05370-90031.pdf (this
is actually the same copy that David Kirkby scanned a few years ago, hosted
by Agilent.) Follow the directions on page 3-11 and 3-12, and post the
results, especially from step 15. This jitter figure is usually well under
50 ps in a 5370 that's working properly.
-- john, KE5FX
Bruce and John,
Thanks for pointing me back to these operator checks. I ran through the
procedures this morning and nothing seems out of spec. I guess I just
had unrealistic expectations about how stable the displays should be
while looking at that counter's own clock.
Here's my results from the Operators Checks on 3-11, 3-12:
1 - 12. Setup
13. Initial TI function: 99.59 to 99.68 nS
14. Sample 100, 99.605 to 99.618
1000, 99.603 to 99.612
10K, 99.6xx x
100K, 99.6xx x
15. STD DEV, +-TI
SS 100, 18.x to 24.x pS
MIN, -0.45 to -0.53
MAX, -0.3x
16. DSP REF 000
SET REF 99.613 nS
CLR REF 00.000
DSP EVTS 100
17. MEAN, 1, +-TI : -0.37 to -0.47 nS
PERIOD COMPLEMENT ok
18. TRIG LEV ok
19. FREQ .01S 9.999 999 9xx to 10.000 000 0x
.1S 9.999 999 99x x to 10.000 000 01x
1S 9.999 999 999 xx to 10.000 000 001 x
20. PERIOD 99.9X to 100.00 nS
21. Start/Stop Output ok
I guess all of that is in specification. Any comments appreciated.
-Rex
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