GSP-818 Quick Start Guide
30
Frequency response (20°C to 30°C, 30% to 70% relative humidity, input
attenuation=10 dB, reference frequency=50 MHz)
Preamp Off (fc
≥
100 kHz) ±0.8 dB
；
±0.4 dB, Typical
Preamp On(fc
≥
100 MHz) ±0.9 dB
；
±0.5 dB, Typical
Difference and Accuracy
RBW Switch
Difference
Reference: 10 kHz RBW at 50 MHz
Log resolution=±0.2 dB, Lin resolution=±0.01
Nominal
Input
Attenuation
Difference
20°C ~30°C, fc=50 MHz, Preamplifier Off, 10 dB RF
attenuation, input signal 0~40 dB ±0.5 dB
Absolute
Amplitude
Uncertainty
20°C to 30°C, fc=50 MHz, Span=200 kHz, RBW=10
kHz, VBW=10 kHz, peak detector, 10 dB RF
attenuation, 95% confidence level
Preamp Off
±0.4 dB, input signal level -20 dBm
Preamp On
±0.5 dB, input signal level -40 dBm
Uncertainty
Input signal range 0 dBm to -50 dBm
±1.5 dB
VSWR
Input 10 dB RF attenuation, 1MHz to 1.8GHz
<1.5, Nominal
Distortion and spurious response
Second harmonic
distortion
fc
≥
50 MHz, Preamp off, signal input -20 dBm, 0
dB RF attenuation, 20°C to 30°C
-65 dBc
Third-order
intermodulation
fc
≥
50 MHz, Input double tone level -20 dBm,
frequency interval 100 kHz, input attenuation 0 dB,
preamplifier off, 20°C to 30°C
+10 dBm
1 dB Gain
Compression
fc
≥
50 MHz, 0 dB RF attenuation, Preamp off ,
20°C to 30°C
>+2 dBm, Nominal
Residual
response
connect 50
Ω
load at input port, 0 dB input
attenuation, 20°C to 30°C
<-85 dBm, from 100 kHz to 1.5 GHz
<-80 dBm, from 1.5 GHz to 1.8 GHz
Input related
spurious
-30 dBm signal at input mixer, 20°C to 30°C
<-60 dBc
