NF FRA5087, Instruction Manual

Page: 178 / 194

9.3 Measurement process
FRA5087 9-8
●Amplitude compression
A feature that controls the oscillator level in a way to keep the amplitude level of the
measurement target system at a fixed value, to prevent saturations and breakages of the
measurement target system.
The datum amplitude level is to be inputted to the reference channel.
Reference channel CH1 or CH2
Datum voltage range
Setting range 1 mV to 250 Vrms
Setting resolution 3 digits
Voltage limit range of the oscillator output voltage
Setting range 1 mV to 10 Vpeak
Setting resolution 3 digits
Error tolerance setting
Setting range 0 to 100 %
Setting resolution 1 %
Correction cycle
Setting range 1 to 9,999
Setting resolution 1
Correction ratio
Setting range 0 to 100 %
Setting resolution 1 %
●Frequency scale high density sweep (automatic low speed high density sweep)
A feature that correctly measures by automatically increasing the sweep density within the
proximate frequency bands whenever measurement data changes greatly
Reference channel CH1 or CH2
Change width
a
､
b
､
R
Setting range 0 to 1 GVrms
Setting resolution 3 digits or 1  V, whichever is greater
dBR
Setting range 0 to 1000 dB
Setting resolution 3 digits or 0.01 dB, whichever is greater
Phase
Setting range 0 to 180 degrees
Setting resolution 3 digits or 0.01 degrees, whichever is greater