Manual SPECTRAN V5
© Aaronia AG 2016 | www.aaronia.com
22
FUNCTIONS
4.2.8. Attenuator
(Attenuator) Default: 0dB
The attenuator (built in) attenuates any fed signals by the
corresponding dB value to avoid an overload of the RF input.
The attenuator can be adjusted in 0.5dB increments up to
31.5dB.
WARNING:
For signals over -20dBm you need to add/adjust the attenuator accordingly
to avoid incorrect measurements!
If the signal strengths is above 0 dBm (peak), the input might be damaged or
destroyed if you don‘t add an attenuator!
4.2.9. Preamplifier
(Preamplifier) Default: AUS
The internal, low-noise preamplifier (preamp) amplifies in
-
coming signals, depending on the frequency by about 15
dB. It increases the measurement sensitivity significantly. By
default the preamplifier is disabled (red LED is off). If the
preamplifier is enabled the LED is bright red.
Please note that the internal preamplifier does not amplify
constantly throughout the frequency range. At very low fre-
quencies the amplification is quite high (about 25dB) and
then decreases linearly to approximately 15dB at 6GHz and
then remains constant at about 15dB to 20GHz.
WARNUNG:
