Performing Calibration; Making A Measurement - JDS Uniphase CellAdvisor JD720C Series User Manual

Chapter 5 Reflection Testing
5

Performing calibration

Perform the mechanical or electronic O-S-L Calibration by pressing the CAL hard key. The
instrument displays on-screen instructions for you to follow through. See "Performing
Calibration" on page 33 for more information.

Making a measurement

Once the O-S-L calibration is done, the instrument is now ready to make a reflection
measurement in VSWR or Return Loss.
Procedure
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2
3
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a Select On for the Bias Tee.
b Enter a value between 12 and 32 with 1 V step, as you desire.
NOTE
If you have set this Bias Tee to On, the instrument will supply a DC bias of set level
(12 – 32 V) from the RF In port to an active device, such as Tower Mounted Amplifier
(TMA) or Low Noise Amplifier (LNA), through the transmission line, eliminating the
need of an external power supply.
Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
Disconnect the calibration kit from the calibration point.
Connect an antenna or feed line to the calibration point, where is usually at the extension cable
end if used. See Figure 17 for the cable connection diagram.
Your measurement result is displayed on the screen in real time.
CAUTION
Do not apply or connect power exceeding +25 dBm to the RF Out / Reflection port. When
the input signal power is greater than +25 dBm, the input power protection is triggered to
protect the instrument and a measurement comes to stop automatically.
CellAdvisor JD720C User's Manual