User guide

20
f. Press Ampt & Trace and Sweep.
Note: Press IFBW and set to 100 Hz with down arrow key. This is rec-
ommended to measure antenna isolation in the -80 to -90 dB range.
Note: Steps g through j are needed to bias a tower top amplifier
(TTA), otherwise go to step k.
Note: It is recommended that the Signal Hawk be plugged into a
power outlet.
g. Press Measure and Bias Tee Voltage, toggle to +12V or
+24V per the TTA requirements.
h. Ensure that Pwr Out (in the Ampt & Trace menu) is set as
low as -40 dBm to avoid overdriving the TTA.
i. Connect output of TTA to VNA RF In port and input of
TTA to VNA RF Out port.
j. Press Bias Tee (in the Measure menu) and toggle on.
Note: Bias Tee should be toggled off when not in use.
k. Press Ampt & Trace and Autoscale (soft key) to view trace on
display OR manually adjust scale with Max and Min Level.
6. Press Ampt & Trace then Units (soft key) select VSWR or Rtn Loss dB.
Note: Units cannot be set when the SignalHawk is in Cable Loss or
Gain & Loss measurement mode.
7. Wait for one sweep, then go into the Ampt & Trace Menu and press Auto-
scale to view trace on display OR manually adjust scale with Max and Min
Level (see “Ampt & Trace Menu” on page 70).
8. In the File & Help Menu, press Quick Save Trace to save the data (see “File
& Help Menu” on page 77).
CAUTION
Do not turn on a DC bias if the thru cable is attached from
the VNA In to the VNA Out. This will damage the VNA input
and destroy the unit.