Keysight E8257D Option H1K User Manual

E8257D H1K
Test Procedure
20. Perform a single sweep on the PSA.
21. Read marker value (DP)
and calculate measured power level:

P
m
= P
REF
+ ∆P
P
gzo
= f(P
m
) (see uncertainty analysis)
compute: PLA
dB
= (P
gzo
±U(P
gzo
))-P
DUT
verify that: PLA
dB
≤ specification
Example:
a. Assume frequency = 277 kHz (first point in Table 4 on page 8
).
b. Assume the -45 dBm power setting on the DUT yields -45.1 dBm on the Power Meter.
Record this value for later measurement conversion.
c. The test uses a spectrum analyzer and an internal preamplifier in the power range -50 to
-90 dBm. With the DUT still set at -45 dBm, search for the peak level on the PSA and set
the Amplitude Reference level to that peak level. Turn on the Marker-Delta function.
Change the DUT power to -50 dBm and perform a Marker Peak. For this example, assume
that the change in power measured by the PSA is -4.8 dB. The absolute power level is
then:
-4.8 dB (power relative to the PSA's reference level)
-45.1 dBm (the absolute power at the reference level)
-49.9 dBm = P
m
22. Calculate the SNR for this power level as shown in the following equation. 
SNR = |SNR(@-45 dBm) - P|
SNR at -45 dBm = -90.63 dB (previously measured in step 12).
P (from step 20) = -10.11 dB
SNR=|SNR(@-45 dBm) - DP|=|-90.63 dB -
-
10.11 dB|= 80.52 dB 
Use 80.52 dB to calculate the Signal to Noise component in the uncertainty for a power level
of -55 dBm.
23. Decrease the DUT power by 5 dB. If necessary change the RBW and Video averages per
Table 4.
24. Repeat step 19 through step 23 for amplitude levels down to -90 dBm.
9
Keysight E8257D Option H1K User's Guide

Keysight E8257D Option H1K Specifications

General

Brand	Keysight
Model	E8257D Option H1K
Category	Portable Generator
Language	English