HP 3580A Operating And Service Manual page 55

Section IV
3580A-B-3609
FROM
STATE 7
0
©
Model 3580A
SLOW FORWARD
COMP (+I
BEGIN COMPARISON
Figure 4-13. ASM Chart (Adaptive Sweep).
The two qualifiers in this state are HNSING (Not Single)
and HGEW. The HNSING qualifier is met when the SWEEP
MODE switch is not in the SING position. When the Single
sweep mode is selected, the controller remains in State
(jJ
following the End of Sweep command. The HGEW qualifier
is met when the display sweep in the Digital Storage section
resets.
4-84. In State 1, the (L) Reset 2 instruction is given to
reset the Ramp Generator. At the same time, a delay is
initiated to allow the IF Filter to settle. When the delay
period is over (DLYO qualifier met) the controller incre-
ments to State 2. If the SWEEP MODE switch is in the
RESET, MAN or LOG ZERO position, the (L) Reset l line
is low causing the controller to remain in State 1.
4-85. In State 2, the Ramp Generator starts sweeping
SLOW FORWARD. The sweep starts out slowly to ensure
that any signals on or near the start frequency
Will
be
4-12
properly detected. If a response is not present or when the
initial response is no longer detected, The HNRESP
qualifier is met and the controller increments to State 3.
4-86. In State 3, the Ramp Generator continues to sweep
SLOW FORWARD. At this time, the COMP ( +) and BCMP
instructions are given and the Ramp Generator must sweep
slow forward until the CCMP qualifier is met. If, for some
reason, a response is detected in State 3, the controller will
not increment to State 4 until the response is passed
{HN~SP
qualifier met).
4-87. In State 4, the Ramp Generator sweeps FAST
FORWARD until a response is detected. When a response is
detected (LRESP qualifier met), the controller increments
to State 5.
4-88'. In State 5, the COMP(-) and BCMP instructions are
given and the Ramp generator sweeps FAST BACKWARD