27 | Keysight | 34980A Multifunction Switch/Measure Unit - Data Sheet
Typical system speeds (Measurements made on a 3.2GHz PC running VB6 in Windows XP Pro)
Direct measurements – direct to I/O
Direct measurement
Single Channel Reading times in msec
Single channel [1] [2]
(includes switch, measure time and I/O time)
to memory(GPIB)
GPIB
msec
USB 2.0
LAN
Measurement into
memory msec
msec
(w/ VXI 11) msec
Single channel, DCV
Single channel, ACV
Single channel, ohms
2.83
5.00
2.91
9.52
3.14
4.57
5.75
4.65
11.76
1.90
4.00
1.90
8.40
5.35
3.14
Single channel while changing
10.64
scale (eg MEAS DCV 10 / MEAS DCV 1)
Single channel while changing
128
120
120
120
function (eg. MEAS ACV / MEAS DCV)
Command execution time [3]
34925A
34923A
34921A
34934A
Open or Close
Read?
Close/Read/Open
Init/*WAI
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
Close/Init/Open
4.7
Open or Close
Read?
Close/Read/Open
Init/*WAI
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
Close/Init/Open
5.2
Open or Close
Read?
Close/Read/Open
Init/*WAI
4.7
2.9
14
1.9
12.4
5
3. 3
15
2.1
14
5.3
4.7
15
3
Close/Init/Open
14
Close
Read?
Open
1.8
2.8
1.5
2.2
3.1
1.8
3.1
4.8
3.2
[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 IO latency dominant
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