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Using a Preamplifier
R&S FSH
1145.5973.12 1.16
E-14
If the preamplifier is switched on, its use is coupled to the reference level, thus ensuring the optimum
dynamic range of the R&S FSH at all times. The table below shows the positions of the RF attenuator
and the preamplifier as a function of the reference level.
Preamplifier
OFF
Preamplifier
ON
Reference level
RF attenuation
RF attenuation
Preamplifier
Low Noise
Low Distortion
Low Noise
Low Distortion
-25 dBm
0 dB
0 dB
0 dB
0 dB
On
-24 dBm to -20 dBm
0 dB
0 dB
10 dB
10 dB
On
-19 dBm to -15 dBm
0 dB
10 dB
10 dB
10 dB
On
-14 dBm to -10 dBm
0 dB
10 dB
0 dB
10 dB
Off
-9 dBm to 0 dBm
10 dB
20 dB
10 dB
20 dB
Off
1 dBm to 10 dBm
20 dB
30 dB
20 dB
30 dB
Off
11 dBm to 20 dBm
30 dB
30 dB
30 dB
30 dB
Off
The attenuator position can be queried at any time via the status display.
深圳市盛腾仪器仪表有限公司
Tel:0755-83589391
Fax:0755-83539691
Website: www.Sengt.com