Compensating for the Loss of an External Cable and Attenuator

Compensating for the Loss of an External Cable and Attenuator
The insertion loss of the test cable and high power attenuator must be compensated for to obtain accurate GSM power measurements. This process is called "normalization" and is described in "Measuring Two Port Insertion Loss"
The insertion loss of the combination of test cable and attenuator is accounted for as the RF In Loss, which is an offset applied to the power measurements by the test set.

Step
Notes

1
[Level/Location]

2
[RF IN Loss]

3
Enter the RF In loss using the numeric keypad.
If you are using a cable and additional devices connected to the antenna, enter the combined cable and device RF In loss here. The RF In loss can be obtained by measuring the Insertion loss. See "Two Port Insertion Loss"

Note: If data had been previously entered in [RF In Loss], that data will be lost and replaced by the value you enter here.

4
[dB]


	Step	Notes
1	[Level/Location]
2	[RF IN Loss]
3	Enter the RF In loss using the numeric keypad.	If you are using a cable and additional devices connected to the antenna, enter the combined cable and device RF In loss here. The RF In loss can be obtained by measuring the Insertion loss. See "Two Port Insertion Loss" Note: If data had been previously entered in [RF In Loss], that data will be lost and replaced by the value you enter here.
4	[dB]