Anritsu MS2665C - Amplitude Display Linearity

SECTION 6 PERFORMANCE TESTS
6-29
Amplitude display linearity
Test the error per vertical graduation for the LOG display. For the LOG display linearity, test that the graduation
is equal to the logarithm (dB) of the input signal level.
Input the correct level signal to the RF Input via an external attenuator and calculate the error from the attenuation
of the attenuator and the ∆ marker reading at the trace waveform peak.
(1) Specifications
• Amplitude display linearity: After automatic calibration
LOG: ±2.5 dB for 0 to –90 dB
±1.5 dB for 0 to –85 dB
±1 dB for 0 to –70 dB
±0.4 dB for 0 to –20 dB
(2) Test instruments
• Signal generator: MG3633A
• Attenuator: MN510C
(3) Setup
Signal generator
Attenuator
INPUT
RF Input
RF OUTPUT
OUTPUT
MG3633A
SG
MN510C
ATT
Coaxial cable (N-type connector)
Amplitude Display Linearity Test
Stby
Shift
On
Preset
Menu On/Off
More
RBW VBW Sweep Time Atten
Local
Remote
F1
F2
F3
F4
F5
F6
Display
Coupled Function
MS2665C
Spectrum Analyzer
9kHz–21.2GHz
PTA Define
Memory Card
Enter
Hold
µv
µsec
EntryMarkerFreq/Ampl
7
Copy Cont
Copy
8 9 GHz
CE
4 5 6 MHz
BS
+/–
3
mV
msec
dBm
dB
V
sec
Cal Interface Mem Card
Sound System Title
1 2 kHz
0 • Hz
A/B.A/BG A/Time
Save
Recall
Amplitude
Span
Frequency
Measure
A.B Time Trig/Gate
Peak
Continuous
CF RLV Single
Marker
Peak
Search
Multi Mkr
Marker
User
RF Input 50Ω
+30dBm
0V DC Max