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Selecting Test Features
Adding Pointer Adjustments
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.
Initialization Sequence
Non Periodic Sequence
Periodic Sequence
No Pointer Activity
Initialization
Continuous Sequence
Sequence
Time
Cool Down
Measurement
Period