Selecting Test Features
Adding Pointer Adjustments
Non Periodic Sequence Initialization Sequence
No Pointer Activity
Sequence
Periodic Sequence
Continuous Sequence
Time
Initialization | Cool Down | Measurement |
|
| Period |
Note: SINGLE (A1), BURST (A2) and PHASE TRANSIENT(A3) are Non Periodic Sequences.
Initialization Period
For SINGLE A1, BURST A2 and PHASE TRANSIENT A3 sequences the initialization sequence consists of 60 seconds of pointer adjustments applied at a rate of 2 adjustments per second and in the same direction as the specified pointer sequence.
Cool Down Period
A period following the initialization period which for SINGLE e), BURST
f)and PHASE TRANSIENT sequences is 30 seconds long when no pointer activity is present.
Sequence (Measurement) Period
The period following the Cool Down period where the specified pointer sequence runs continuously.
Periodic Test Sequences
For periodic test sequences (for example PERIODIC ADD) both the 60 second initialization and 30 second cool down periods consist of the same sequence as used for the subsequent measurement sequence. If the product of the period T and the selected Optional background pattern (87+3 or 26+1) exceeds 60 seconds then the longer period is used for the initialization. For example, if T is set for 10 seconds then the initialization period may be extended to 900 seconds.
The HP 37718A displays a message indicating which phase (initialization, cool down or measurement) the transmitter is currently generating.
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