HP 3585A Service Manual page 53

Model 3585A
I
Sweep Functions:
SWEEP I NG
Lights to indicate that a frequency sweep is in progress . Goes out between sweeps
o
and during mid-sweep interruptions .
G
Repetitive frequency sweeps synchronized by sweep trigger . Upon completion of
CONT
each sweep , the sweep is automatically rearmed and a new sweep is initiated on
receipt of a sweep trigger. Pressing
gress (except when switching from Single) .
G
Single frequency sweep initiated by sweep trigger . Once a Single sweep has ter-
S I NGLE
minated, it resets to the Start Frequency to await rearming . Pressing
cept when switching from Cont .) resets and/or rearms the sweep, enabling a new
sweep to be initiated by a sweep trigger . *
ENTRY
Selects Manual mode; automatically activates
equal to current Marker frequency; prefaces Manual frequency, enabling it to be
changed by Step or Numeric Entry.
Trigger Functions:
G
Sweep automatically triggered after rearming .
G
Sweep internally triggered at power-line frequency (48 Hz to 440 Hz) .
G
Sweep triggered by High-to-Low transition or contact closure at EXT TRIG in­
put . *
=
High
to - 35V. Sweep triggered by High-to-Low transition ; triggers are accepted only
after the sweep has been rearmed . (Rearming time ranges from about 25
E X T T R I G G E R
milliseconds to 2.4 seconds , depending on RBW /VBW settings .) Triggers applied
during a sweep or during rearming are ignored .
*Sweep rearming and triggering operations are inhibited during Automatic Calibrations and also while operating
parameters are being changed .
SWEEP A N D TRI G G E R FU NCTI O N S
4.'@ .;;. � .
" [DJ-
f*.�"T��
+ +
open or 2.0V to 35V; Low
CONT
0
resets the sweep that is currently in pro-
MAN
SWEEP
; sets Manual frequency
=
short to ground (outer shell) or
Operation Overview
SWEEP
o
SWEEP I NG
S I NGLE
(ex-
+
1 . 3V
3-21