Atek HP 8753D, User Manual, Page: 110 / 677

Loop Counter Example Sequence
This example shows you the basic steps necessary for constructing a looping structure within
a test sequence . A typical application of this loop counter structure is for repeating a specic
measurement as you step through a series of CW frequencies or dc bias levels . F or an example
application, see \Fixed IF Mixer Measurements" in Chapter 3.
1. T o create a sequence that will set the initial value of the loop counter , and call the sequence
that you want to repeat, press:
4
SEQ
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NEW SEQ/MODIFY SEQ
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SEQUENCE 1 SEQ1
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SPECIAL FUNCTIONS
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
DECISION MAKING
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
LOOP COUNTER 4
10
5 4
x1
5
4 SEQ 5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
DO SEQUENCE
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SEQUENCE 2
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
DONE SEQ MODIFY
This will create a displayed list as shown:
SEQUENCE LOOP 1
Start of Sequence
LOOP COUNTER
10x1
DO SEQUENCE
SEQUENCE 2
T o create a second sequence that will perform a desired measurement function,
decrement the loop counter , and call itself until the loop counter value is equal to zero ,
press:
4
SEQ
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NEW SEQ/MODIFY SEQ
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SEQUENCE 2 SEQ2
4 MEAS 5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Trans: FWD S21 (B/R)
4
SCALE REF
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
AUTO SCALE
4 MARKER F CTN 5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
MKR SEARCH
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SEARCH: MAX
4
SEQ
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SPECIAL FUNCTIONS
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
DECISION MAKING
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
DECR LOOP COUNTER
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
IF LOOP COUNTER<> 0
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SEQUENCE 2 SEQ2
4
SEQ
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
DONE SEQ MODIFY
This will create a displayed list as shown:
SEQUENCE LOOP 2
Start of Sequence
Trans: FWD S21 (B/R)
SCALE/DIV
AUTO SCALE
MKR Fctn
SEARCH MAX
DECR LOOP COUNTER
IF LOOP COUNTER <> 0 THEN DO
SEQUENCE 2
T o run the loop sequence , press:
4 PRESET 5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SEQUENCE 1 SEQ1
2-62 Making Measurements