30 34980A Service Guide
2 Specifications
Typical System Speeds
Measurements made on a 3.2 GHz PC running VB6 in Windows XP Professional.
[1]
Readings were made with minimum NPLC, delay 0, display off, autozero off.
[2]
All times include the issue of “READ?” and the retrieval of data.
[3]
CLOSE or OPEN bus transfer times allowed to overlap previous command. Command parse times overlap current activity until I/O
latency dominant.
Single Channel Reading
Time (in msec)
Direct Measurements – direct to I/O
(includes switch, measure time, and I/O time)
Direct
Measurment to
Memory
(GPIB)
Single Channel
[1, 2]
GPIB USB 2.0 LAN
(w/VXI 11)
Measurement
into memory
Single Channel, DCV 2.83 ms 3.14 ms 4.57 ms 1.9 ms
Single Channel, ACV 5.00 ms 5.35 ms 5.75 ms 4 ms
Single Channel, Ohms 2.91 ms 3.14 ms 4.65 ms 1.9 ms
Single Channel while
changing scale
(e.g. MEAS DCV 10 to
MEAS DCV 1)
9.52 ms 10.64 ms 11.76 ms 8.4 ms
Single Channel while
changing function
(e.g. MEAS ACV to
MEAS DCV)
128 ms 120 ms 120 ms 120 ms
Command Execution Time
[3]
34925A Open or Close
Read?
Close/Read/Open
Init/*WAI
Close/Init/Open
0.7
2.9
4.8
1.9
3.7
0.9
3.3
5.3
2.1
4.1
1.6
4.7
6.5
3
4.7
34923A Open or Close
Read?
Close/Read/Open
Init/*WAI
Close/Init/Open
0.9
2.9
5.3
1.9
4.2
1.2
3.3
5.8
2.1
4.7
1.8
4.7
6.5
3
5.2
34921A Open or Close
Read?
Close/Read/Open
Init/*WAI
Close/Init/Open
4.7
2.9
14
1.9
12.4
5
3. 3
15
2.1
14
5.3
4.7
15
3
14
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