Performing (and Calibrating) a Basic One Port Insertion Loss measurement

Performing (and Calibrating) a Basic One Port Insertion Loss measurement
Select the desired frequency range and calibrate the test set for a One Port Insertion Loss measurement. To calibrate your test set, you will need the following pieces of equipment:
Cable, N (male) to N (male), part number 8120-8862 or 8121-1315
Calibrated 50 ohm Open connector, part number 1250-3421
Calibrated 50 ohm Short connector, part number 1250-3424
Calibrated 50 ohm Load connector, part number 1250-3423

NOTE: All four of these required accessories are supplied as standard with your Agilent E7495A/B test set.

Step
Notes

1
Mode

2
[Antenna/Cable]

3
[One Port Insertion Loss]
The one port insertion loss measurement takes a few seconds to load.

4
[Start Freq]

5
Enter the start frequency using the numeric keypad.

6
[Hz], [kHz], [MHz], or [GHz]

7
[Stop Freq]

8
Enter the stop frequency using the keypad.
The stop frequency should be larger than the start frequency.

9
[Hz], [kHz], [MHz], or [GHz]

10
Check whether your analyzer has already been calibrated over the frequency range that you wish to measure. If it is already calibrated over the correct frequency range, you can omit the next step (Step 11) and go straight to Step 12.
The analyzer displays its calibration status on the top left of the measurement screen. You only need to re calibrate if you:
power off the test set
change the start frequency to a new value that lies below the start frequency of your previous calibration
change the stop frequency to a new value that lies above the stop frequency of your previous calibration
change any of the jumper leads that you used for the calibration
change any of the attenuators that you used for the calibration
change the type of cable specified under the [Cable Type] menu key in the Distance to Fault measurement.
For more information, see "Calibration - Minimizing your Workload"

11
If your analyzer is uncalibrated, or has been calibrated over an unsuitable frequency, press [Calibrate]
Follow the instructions of the Calibration Wizard. The test set will calibrate over the desired frequency range.

12
Connect the antenna feedline and antenna.
Connect the antenna feedline cable to the RFout/SWR port.

13
Disconnect the feedline at the top of the tower, and connect a short connector to the feedline.
This step is necessary to get a good mismatch for the measurement.

14
[Level]
Below the trace on the screen is a table displaying the average insertion loss.
If the trace is not visible, you can change the reference level or use Autoscale to have the test set select a reference level for you.

To choose Autoscale, press [Autoscale].
To set the level manually, press [Ref Level], enter a value using the numeric keypad, then press [dB].


	Step	Notes
1	Mode
2	[Antenna/Cable]
3	[One Port Insertion Loss]	The one port insertion loss measurement takes a few seconds to load.
4	[Start Freq]
5	Enter the start frequency using the numeric keypad.
6	[Hz], [kHz], [MHz], or [GHz]
7	[Stop Freq]
8	Enter the stop frequency using the keypad.	The stop frequency should be larger than the start frequency.
9	[Hz], [kHz], [MHz], or [GHz]
10	Check whether your analyzer has already been calibrated over the frequency range that you wish to measure. If it is already calibrated over the correct frequency range, you can omit the next step (Step 11) and go straight to Step 12.	The analyzer displays its calibration status on the top left of the measurement screen. You only need to re calibrate if you: power off the test set change the start frequency to a new value that lies below the start frequency of your previous calibration change the stop frequency to a new value that lies above the stop frequency of your previous calibration change any of the jumper leads that you used for the calibration change any of the attenuators that you used for the calibration change the type of cable specified under the [Cable Type] menu key in the Distance to Fault measurement. For more information, see "Calibration - Minimizing your Workload"
11	If your analyzer is uncalibrated, or has been calibrated over an unsuitable frequency, press [Calibrate]	Follow the instructions of the Calibration Wizard. The test set will calibrate over the desired frequency range.
12	Connect the antenna feedline and antenna.	Connect the antenna feedline cable to the RFout/SWR port.
13	Disconnect the feedline at the top of the tower, and connect a short connector to the feedline.	This step is necessary to get a good mismatch for the measurement.
14	[Level]	Below the trace on the screen is a table displaying the average insertion loss. If the trace is not visible, you can change the reference level or use Autoscale to have the test set select a reference level for you. To choose Autoscale, press [Autoscale]. To set the level manually, press [Ref Level], enter a value using the numeric keypad, then press [dB].