Fluke 9640A Series, Instruction Manual

Page: 105 / 324

Local Operation
Operating the Instrument
3
3-57
Table 3-20. Sweep-Frequency Fields
ead95f.bmp
Field Range Units
Start 9.000 Hz to 4.0240000000 GHz Hz (Hz, kHz, MHz, GHz)
Stop 9.000 Hz to 4.0240000000 GHz Hz (Hz, kHz, MHz, GHz)
Level -130.000 dBm to 24 dBm (50
Ω
)
20 dBm max >125.75 MHz
14 dBm max > 1.4084 GHz
-136.000 dBm to 18 dBm (75
Ω
)
14 dBm max >125.75 MHz
8 dBm max > 1.4084 GHz
dBm, Vp-p and Vrms (uV, mV, V),
W (nW, uW, mW, W), dBuV
Linear Step
[1]
0.1 Hz to 4.024GHz
Subject to max steps of 5000000
Hz (Hz, kHz, MHz, GHz), %*, ppm**
and Steps per Sweep
Step Dwell 20 ms to 10 s
Subject to max duration of 100
hrs
s (ms,s)
[1] If a Logarithmic Sweep is selected, the
Linear Step
field is renamed to
Log Step
. The field is now expressed in Units of “Steps per Sweep”
or “Steps per Decade” only. In the latter case Span must be larger than a decade.
* Any entry expressed in % (or converted to %) is subject to a limit of +1000 %.
** Any expressed in ppm (or converted to ppm) is subject to a limit of +10000 ppm.
Measurement Integrity at High Signal Levels
The maximum output level of the Instrument is unusually high (+24 dBm into 50 Ω and
+18 dBm into 75 Ω ). This power level could damage an RF load, active or passive, or
exceed the maximum-rated level of the load. Measurement integrity can be impaired by
load damage, non-linearity or self-heating of the load.
Measurement Integrity at Low Signal Levels
The Instrument is capable of sourcing very small signal levels (-130 dBm in a 50 Ω
system). At low signal levels, take particular care to eliminate interfering signals from
the measurement. The following notes discuss best interconnection and measurement
practice.