ACT6000 User Guide – January 2021 Page 41 of 52
12.2. Spectrum & Network Analyzer (for Base and Medium Band)
From the Main Menu select and enter the Signal Analysis item, then select and enter one
of these bands: 1. BASE BAND TESTS or 2. MEDIUM BAND TESTS and select the item
2. SPECTRUM ANALYZER, will shown this menu:
By pushing the key and arrows select
the RX and / or the TX parameters:
Vo Ref (to set the grid range), dB/Div (to set
the vertical resolution), Fc (Hz) (to set the
central frequency on the grid), Hz/Div (to set
the horizontal resolution), Out Lev (to set the
output level of the generator),
TX Freq (to set in Hz the fixed frequency of the
generator), Zo RTx (to set the Input or In/Out
impedance), Zo TX (to set the Output
impedance)*. After the selection, pushing the
it is possible to modify the parameter by
using the arrows.
Other setting:
Repeated pushing of the F1 key and “Enter” the following level reading
mode: dBm, dBm/Hz, dBr, dBV and dBu can be selected.
By repeated pushing of the F2 key and “Enter” it is possible to set the
generator: TX On (at a fixed programmable frequency), Noise (wide band white
noise), TX SW (sweep signal tracking with RX, TX Off to switch off the generator,
an useful thing to measure very low signals (e.g. noise level).
By repeated pushing of the F2 key and “Enter” it is possible to set the
measurement mode: 2W Ret-L (2 wires Balanced) - mix TX/RX to measure the
Return Loss, or 2W L-Bal (2 wires Balanced) - mix TX/RX to measure the
Longitudinal Balance Loss, or 4W Bal (4 wires Balanced), or 4W Unb (4 wires
Unbalanced) to measure the Cross-Talk “Next” or the Insertion Loss of
a loop line).
By repeated pushing of the F4 key and “Enter” it is possible select the
measurement mode: Normal or (highlighting in red text) the Maximum or Mean
or Minimum input level.
By repeated pushing of the F5 key and “Enter” it is possible to configure the
front-end of the instrument to perform the measurements by DC or AC coupling or,
by external Probe “ACT-15” to perform the PSD on powered lines enabled only if
selected the “Zo RTx” in “Z-high”, or -50 dB to compensate the high levels
readout if inserted the 50 dB Attenuator ““ACT-17/B” o “ACT-17/U”.
To improve the maximum resolution in Base Band (625 Hz/Div), push the key.
In this case the horizontal resolution will change from 625 Hz/Div to 312.5 Hz/Div.
With Fc (Hz) on 1862 Hz, the frequency range will be 300 ÷ 3425 Hz.
In Medium Band push the key to show the applied “Resolution Bandwidth”.
* In 2 Wire mode the TX impedance is the same of the RX, the High Z isn’t allowed.
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