GW Instek GSP-810 User Manual - Manual (Page 28)

GSP-810 User Manual
26
POWER METER (Optional)
To access the power meter in the GSP-810, press the SHIFT PWR MTR. The
bottom half of the screen will show the power level in mW or dBm based on the
units selected in the setup screen. The range field will allow the user to change the
range of 2mW, 20mW, 200mW and 2W (or equivalently 3dBm, 13dBm, 23dBm and
33dBm). The AUTO option is helpful when the input signal power is unknown. If the
reading under AUTO selection is close to any one of the four level boundaries as
mentioned above, it is recommended to use the two next ranges to do again. In
general, the lower range will be more accurate.
The 4-digit frequency field specifies the frequency of the signal to measure. This
field is independent of the Center Frequency field as it is only used for the power
meter.
The “ZERO” function will zero the power meter in all ranges required. This should
be performed before taking initial readings. When performing a zero function, there
should be no signal source connected to the GSP-810.
The power meter readings will continuously update as long as the power meter is
active. A power reading of “- ∞” indicates a value of 0 mW in dBm units.
CENTER
SPAN
REF LVL
RBW
7 8
.
6
SHIFT
PK->MKR
MKR->CF
SETUP
TRACE
MKR
MKR
E
N
T
E
R
MHz
dBm 4 5
2 1
0
3
9
-
SPAN
CENTER
REF LVL
DEMOD
MEM
TRK GEN
RBW
PWR MTR .
500.000MHz 20 dBm
100 MHz/div 4 MHz
RANGE: 2W 10MHz
POWER:-10dBm ►ZERO
500.000MHz 20 dBm
100 MHz/div 4 MHz
RANGE: 2W 10MHz
POWER:-10dBm►ZERO