Agilent Technologies PSA Series User And Programming Manual page 77

Key Path:
BW/Avg
or
Auto Couple
Remote Command:
See "Avg/VBW Type" on page
Example:
AVER:TYPE RMS
2.3.5.4 Voltage Avg
In this Average type, all filtering and averaging processes work on the voltage of the
envelope of the signal. This scale is good for observing rise and fall behavior of AM or
pulse-modulated signals such as radar and TDMA transmitters, but its response to
noise-like signals is 1.049 dB lower than the average power of those noise signals. This is
compensated for in the Marker Noise function. When this type of averaging is selected,
VAvg appears on the left side of the display.
In the equation for averaging on this scale (below), N is the number of averages
accumulated. (In continuous sweep mode, once N has reached the Average Number, N
stays at that value.)
New Avg
Assumes all values in dB.
Key Path:
BW/Avg
or
Auto Couple
Remote Command:
See "Avg/VBW Type" on page
Example:
AVER:TYPE SCAL
Chapter 2
,
Avg/VBW Type
,
Avg/VBW Type
74.

( ) ×

N 1 –
×
------------------------------------------------------------------------------
= 20 log


,
Avg/VBW Type
,
Avg/VBW Type
74.
Old Avg New data
-------------------- ---------------------- 
20 20

10 + 10

N

Instrument Functions: A - L
BW/Avg
77