10 Adjusting the Frequency Setup © Tait Electronics Limited February 2007
Setup
To tune the front end of a UHF (H-band) receiver, follow these steps.
1. Make sure that the equipment is correctly set up and that the Calibration
Software is connected to the reciter.
2. Select the Frequency Setup tab, and double-click Tune Receiver Front
End. The Tune Receiver Front End Wizard appears.
Note: If you haven’t adjusted the receiver lock band in the current
session, an alert appears, recommending that you run the Set
Receiver VCO wizard first. If the lock band needs adjusting, click
Yes and carry out that procedure first. If you are confident that the lock band
is correct, click No.
3. Connect the CTU’s noise source to the receiver input, turn the noise source
on, and then click Next.
4. Click Coarse (fast) and use the tuning tool to roughly adjust the front-end
helical filters on the receiver. As you do so, observe the graphical RSSI
readings across the lock band. Adjust to maximize the response across the
entire switching band.
Note: For final fine tuning, you may find it helpful to select a more
sensitive scale, so that you can see the graphical reading in more
detail.
6
4
3
1
2
5
1 PC 2 RS-232 cable 3 Programming port
4 CTU 5 Noise source 6 Reciter
First set
Second set
Helical
filters:
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