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Commit | Line | Data |
---|---|---|
f53468a3 AG |
1 | ------------------------------------------------------------------------------- |
2 | GPIB / HP 53131A | |
3 | ------------------------------------------------------------------------------- | |
4 | ||
5 | This is a set of captures of traffic with an HP53131A counter using an | |
6 | AR488 (Arduino bitbang GPIB adapter). | |
7 | ||
8 | ||
9 | Logic analyzer setup | |
10 | -------------------- | |
11 | ||
12 | The logic analyzer used was a generic FX2 board (at 500kHz): | |
13 | ||
14 | Probe GPIB | |
15 | ---------------- | |
16 | 0 DIO1 | |
17 | 1 DIO2 | |
18 | 2 DIO3 | |
19 | 3 DIO4 | |
20 | 4 DIO5 | |
21 | 5 DIO6 | |
22 | 6 DIO7 | |
23 | 7 DIO8 | |
24 | 8 EOI | |
25 | 9 DAV | |
26 | 10 NRFD | |
27 | 11 NDAC | |
28 | 12 IFC | |
29 | 13 SRQ | |
30 | 14 ATN | |
31 | 15 REN | |
32 | ||
33 | ||
34 | hp53131a-idn-read.sr | |
35 | -------------------- | |
36 | ||
37 | Send *idn? and receive instrument ident string. | |
38 | Send 'read?', wait for acquisition and receive a measurement (10MHz frequency). | |
39 | ||
40 | ||
41 | hp53131a-ton.sr | |
42 | --------------- | |
43 | ||
44 | Set HP53131A to period measurement and talk-only mode and AR488 to | |
45 | listen-only mode. | |
46 | ||
47 | This setup is specifically useful for recording long logfiles of timing data | |
48 | for use in ADEV measurements by "time-nuts": | |
49 | ||
50 | http://www.ke5fx.com/timelab/readme.htm | |
51 | ||
52 | Note: the regular NRFD/NDAC handshake occurring before and after the LON | |
53 | transfer is related to the AR488 timing out non-existent transfers and may | |
54 | be incorrect. |