Frequency range

25 to 3300MHz(S331A)
25 to 4000MHz(S400A)

Freqeuncy accuracy(CW mode)

75ppm

Frequency resolution

100kHz

Immunity to interfering RF signals up to^*2

-15dBm

Return loss

Range:0 to 54dB,Resolution:0.01dB

SWR

Range:1 to 65,Resolution:0.01

Cable/Waveguide Loss

Range:0 to 20dB,Resolution:0.01dB

Insertion Loss/Gain

Display range:-120 to 100.0dB
Resolution:0.1dB
(S120A,S251A)

Distance-to-fault(S120A,S251A,S331A,
S810A,S818A,S820A)

Vertical range
Return loss:0 to 54dB
SWR:1 to 65
Horizontal range:0 to 128*(resolution)
Horizontal resolution,rectangular widowing resolution(meter):
Coax:(105*10^8)(up)/△ frequency^*3
Waveguide:(1.5*10^8)(√(1-(F F1)^2/√ frequency)^*4

Wattmeter(RF power 
monitor,Option 5)

Display range:-80 to +80dBm,10pW to 100kW
Detector range:-50 to +20dBm,10nW to 100mW
Resolution:0.1dB,0.1*W

Bias Tee(Option 10)S251A only

+15VDC,200mA maximum

Trace memory

40(S331A and S400A)
50(S120A and S251A)
70(S800A series)

Instrument configuration

9(S331A and S400A)
50(S120A and S251A)
70(S800A series)^*5

Calibration memory

2(S331A and S400A)
4(S120A and S251A)
6 (S800A series)

Test port connector

Precision N female

Maximum input without damage

N(f) test port:+22dBm
RF power detector:+20dBm,50Ω

Temperature

Operating:0℃to 50℃
Storage:-20℃to 75℃

Weight

1.14kg(2.5lbs.)nom(S331A and S400A series)
1.36kg(3.0lbs.)nom(S120A,S251A and S800A series)

Size

203.2mm*177.8mm*57.2mm(8in*7in*2.25in)

General

Electromagnetic compatibility:Meets Europerancommunity requirements for CE marking.
RS232:9-pin D-sub,three wire serial