GW Instek GSP-827 User Manual - Manual (Page 34)

2.7GHz Spectrum Analyzer Operation Manual
⎯ ⎯
33
Start/ Stop Entry
UP/ DOWN: To change frequency for one step size which is defined in Step function.
Scroll: To change the frequency 1/500 Span for every single movement. Clockwise rotation
increases the setting while counterclockwise rotation decreases the setting.
For example, the start frequency is at 95.0MHz and stop frequency is at 105.0MHz, the
span is at 10MHz, the first clockwise movement of scroll key will change Start Frequency
to 99.52MHz. The second movement will change the start frequency to 95.03996MHz since
the span was changed to 9.98MHz (105.0-95.02).
Editing: Directly specify the center frequency.
The relation between Center/Span and Start/Stop are as follows.
⎟
⎠
⎞
⎜
⎝
⎛
− =
2
Sapn
Center ency StartFrequ
and ⎟
⎠
⎞
⎜
⎝
⎛
+ =
2
Sapn
Center ncy StopFreque
Start:99.5MHz
RBW:30 kHz
Stop:100.5MHz
VBW:100 kHz
Center:100.0MHz
Span:1.0MHz
Sweep:100.0ms
Center
Peak-
>Cente
Ref Lvl: -30.0 dBm
-30.0
-40.0
-50.0
-60.0
-70.0
-80.0
-90.0
-110.0
-100.0
SAT JAN 28, 2003 14:30:25
INT:REF
AMPL CAL
Start
Stop
Step
1
Frequency Start
Stop
0
1 2 3
7
6 5 4
8 9
. -
GHz
dBm
MHz
dBmV
kHz
dBuV
BK SP