HP 8756A Operation Manual

Model 8756A
0 I SPLAY --+HEM
(DISPLAY)
AUTO
EJ
MKR--+ REF
Operating Information
e MEAS
e HEM
e H-HEM
Selects DISPLAY of a MEASured ratio or
power, the stored MEMory, or the MEASure-
ment minus MEMory (normalized) data. The
horizontal display resolution of the 8756A
is 401 points.
The shift function of this key places the
current MEASurement DISPLAY data into in-
ternal memory. MEMory data is always
stored at the highest resolution (.003 dB
for MEAS PWR and .006 dB for MEAS RATIO)
regardless of the DISPLAY, SCALE per divi-
sion, or REFerence LEVEL value set.
Allows selection of 20, 10, 5, 2, 1, 0.5,
• dB/DIV 0. 2, or 0.1 dB vertical resolution per
division, using the ENTRY area.
The shift function of this key performs an
AUTO SCALE of the MEASurement and DISPLAY
selected. AUTO SCALE adjusts the REFerence
LEVEL value and SCALE per division values
so that the entire trace of data can be
seen on the display.
Provides selection of either the REFerence
LEVEL or REFerence POSN (position) of the
• LEVEL reference line. REF POSN may be set to any
• PDSN of the major horizontal graticule lines
using the KNOB or STEP keys.
The reference line LEVEL on the display is
the dB or dBm value to which measurements
are compared, and serves as the horizontal
line about which the display is expanded
when the SCALE per division is decreased.
The REF LEVEL value is changed using the
ENTRY area. Varying this level allows easy
measurement of any point on the display
trace.
The shift function of this key sets the
REFerence LEVEL value to that of the
CURSOR. This is useful when higher resolu-
tion is desired about the CURSOR position.
When the 8350B Sweep Oscillator or the
8340A Synthesized Sweeper HP-IB (address 19
decimal) is connected to the 8756 SYSTEM
INTERFACE on the Rear Panel of the 8756A,
and the CURSOR is off, the REFerence LEVEL
value will be set to that of the 8350B or
8340A Active Marker amplitude value.
Figure 3-1. Front Panel Operating Features (5 of 11)
3-7

HP 8756A Specifications

General

Brand	HP
Model	8756A
Category	Measuring Instruments
Language	English