Model8555A
General
Information
Table 1-2. Supplemental Performance Characteristics (
cont'd)
SUPPLEMENTAL PERFORMANCE CHARACTERISTICS (Continued)
Single: Single scan with reset actuated by front
panel pushbutton.
Ext:
Scan determined by 0 to
+8
volt external
signal; scan input impedance
> 10 kr2.
Blanking: -1.5V external blanking signal required.
Manual:
Scan determined
by
front panel control;
continuously variable across CRT in either
direc-
tion (8552B only).
Scan Trigger: For Internal- Scan Mode, select
-between:
Auto: Scan free runs.
Line:
Scan synchronized with power line
frequency.
Ext:
Scan synchronized with
>2
volt (20 volt
max.) trigger signal (polarity selected by inter-
nally located switch
in
IF
Section).
Video: Scan internally synchronized
to
envelope
of
RF input signal (signal amplitude
of
1.5
major divisions peak-to-peak required on
dis-
play section CRT).
DISPLAY CHARACTERISTICS
Variable Persistence/Storage (Model 141T):
Plug-ins: Accepts Model 8550-series Spectrum
Analyzer plug-ins and Model
1400-series time
domain plug-ins.
Cathode-ray Tube:
Type: Post-accelerator storage tube,
9000 volt
accelerating potential; aluminized P31
phosphor; etched safety glass faceplate reduces
glare.
Functions Used with Time Domain Plug-ins
Only:
Intensity modulation, calibrator, beam finder.
Special Order: Chassis slides and adapter kit: Fixed
slides, order
HP
Part Number 1490-0714; pivot
slides, order
HP
Part Number 1490-0718; slide
adapter kit for mounting slides on
scope, order
HP
Part Number 1490-0721.
Persistence:
Normal: Natural persistence
of
P31 phosphor
(approximately
0.1 second).
Variable:
Normal Writing Rate Mode: Continuously
vari-
able from less than 0.2 second
to
more than
one minute (typically
to
two
or
three
minutes).
Maximum Writing Rate Mode: Typically from
0.2
second to 15 seconds.
Erase: Manual; erasure takes approximately 350
ms;
CRT ready
to
record immediately after
erasure.
Storage
Time: Normal writing rate; more than 2
hours at reduced brightness (typically 4 hours).
More than one minute at maximum brightness.
Fast writing speed; more than
15
minutes
(typically
30 minutes) at reduced brightness or
more than
15
seconds at maximum brightness.
Functions Used with Time Domain Plug-ins
Only:
Intensity modulation, calibrator, beam finder.
Normal
Persistence (Model140T):
Plug-ins: Same
as
141
T.
Cathode-ray Tube:
Type: Post-accelerator, 7300 volt potential
medium-short persistence
P7
phosphor;
tinted and etched safety glass faceplate
re-
duces glare. (Normal persistence of
P7
phos-
phor approximately 0.3 sec).
Graticule: 8 x
10
division (approximately 7,6 x
9,5 em) parallax-free internal graticule;
five
subdivisions per major division on horizontal
and vertical axes.
Functions Used with
Time Domain Plug-ins
Only: Same
as 141T.
Normal
Persistence Large Screen Display (Model143S):
Plug-ins:
Same
as
141T.
Cathode-ray Tube:
Type: Post-accelerator, 20
kV
accelerating
potential, aluminized
P7
phosphor. (Persis-
tence approximately
0.3
sec.)
Graticule:
8 x
10
divisions (approximately 8 x
10 inch) parallax-free internal graticule,
five
subdivisions per major division on horizontal
and vertical axes.
Functions
Used with Time Domain Plug-ins
Only: Same as 1411'.
GENERAL
CHARACTERISTICS
CRT BASELINE CLIPPER: Front panel
control adjusts blanking
of
CRT trace
baseline
to
allow
n1ore
detailed analysis
of
low-repetition-rate signals and
im-
proved photographic records to
be
made.
Temperature Range:
Operating,
0°
to +40°C;
storage, -40°
to
+75
C.
1-7
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