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Chapter 11 2-Port Phase Testing
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5
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7
Performing calibration
Perform the O-S-L-Thru Calibration by pressing the CAL hard key. The instrument displays
on-screen instructions for you to follow through. See "Performing 2-port calibration" on page
40 for more information.
Making a measurement
Once the calibration is done, the instrument is now ready to make a measurement.
Procedure
1
2
3
98
requires you to perform a new calibration.
To set the number of measurements to be averaged, complete the following steps:
a
Select the input box next to the Average.
b
Enter a value between one and five.
To enable the Interference Rejection feature, select On.
NOTE
Default setting is Off. It is recommended to use this feature only when you suspect
interfering signals in the area as it slows down measurement.
For JD725C and JD726C users with the option 001 Bias Tee installed. To use the Bias Tee,
complete the following steps:
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 calibrated extension cable from the RF In port of the instrument.
Connect your DUT between the extension cable and the RF In port as illustrated in Figure 59.
Your measurement result is displayed on the screen in real time.
CellAdvisor JD720C User's Manual
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