Timing; Equipment; Procedure; Period - HP 8112A Operating, Programming And Servicing Manual

Timing

Procedure

9-10 Adjustment Procedures
Counter (HP 5335A)
n
Oscilloscope (HP 52141T)
n

Period

1. Set up the HP 8112A as follows:
Trigger Mode
Control Mode
P E R
DEL
D T Y
Transition
HIL
COMPL
DISABLE
LIMIT
2. Set the counter for Period measurement.
3. Connect HP 8112A output via a 500 feedthrough to the counter.
4. The typical period accuracy of the period decades is as shown in
Figure 9-4.
5. Adjust the range high end with A2R4 for approx 1% above the
programmed value (i.e. l.Olms).
6. Alter HP 8112A PER to 9.99 ms.
7. Adjust the range low end with A2R6 for approx 1% above the
programmed value (i.e. lO.lms).
8. Alter HP 8112A PER to 5.0 ms.
9. Check that the mid-range deviation is about the same as the
low/high range BUT negative. See Figure 9-4.
NORM
Off
1 ms
65 ns
50%
Fixed
0.0 v
Off
Off
Off
Figure 9-4. Decade Accuracy
PERIOD