Giga-tronics 8003, Руководство по эксплуатации

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Operation
Manual 20791, Rev. C, June 2001 2-87
2.11 Cursors & Markers
Cursors and markers provide a very convenient way to read numeric values right off the trace. The 8003
Precision Scalar Analyzer can display up to one cursor, one delta-cursor, and ten markers simultaneously
on all four channels).
2.11.1 Search Functions Using the Cursor
The cursor indicates power and frequency at any point on the trace. It is activated when the
[CURSOR]
key is pressed, and can be controlled by the spin knob or by entry of a frequency on the
numeric keypad.
The cursor search functions automate commonly used cursor operations such as min/max searches and
-3 dB and bandwidth searches.
2.11.2 Min & Max Search
To search for the maximum point on a trace, press
[CURSOR]
followed by the [ SEARCH ] softkey.
Press [ MAX ] to find the maximum point on a trace. The power/insertion loss/return loss at the
maximum point is read next to the label CRSR in the active channel’s summary area. The frequency at
the maximum point is read at the bottom center of the screen.
Figure 2-42: Typical Measurement (Cursors, Delta Cursors & Markers)
RETURN
MIN
MAX
BAND-
WIDTH
SEARCH
RIGHT
SEARCH
LEFT
SEARCH
VALUE
CH1:SW A -PC ACSR -3.00 dB
1.0 dB/ H REF -0.17 dB
CURSOR
STRT 2.000 GHz
∆
CRSR 6.672 GHz
STOP 10.000 GHz
2
∆
∆
SRCHD -3.00 dB
6.672 GHz
VALUE 'FOUND' TRACE HOLD
1