Aeroflex Test Solutions

2935 High Speed Test
Option 02
Performance Improvement

There are three ways in which a 2935 user can achieve faster test times, with no degradation in test accuracy:

1. Use test scripts that have been optimized for speed.
2. Use the new High Speed Test option, 02.
3. Use both.

The speed improvements that can be gained depend upon the nature of the test being run. However, it is very significant that the maximum percentage gain is achieved when running the kind of test scripts that most 2935 users employ; i.e. the standard Aeroflex-supplied “Brief” tests, and typical user-created derivatives.

The following tables summarize the gains to be made by:

• Simply using the new speed-optimized “HS” version of the standard Aeroflex-supplied scripts. As the “HS” scripts are supplied with PhoneTest 2.2-onwards, they are available to all 2935 users, irrespective of whether they have purchased Option 02.
• Running the “HS” scripts in conjunction with Option 02.

Note that, although certain GSM test set manufacturers claim very short test times, closer examination reveals that they are carefully omitting the considerable time taken by registration, etc. As the note overleaf indicates, the percentage gains shown below include an allowance for registration, paging, etc.

		Time saved by using:
		“HS” script, Opt 2 disabled	“HS” script, Opt 2 enabled
“Brief”	Single band	5 sec (6%)	22 sec (27%)
	Dual band	11 sec (8%)	40 sec (29%)
“Comprehensive”	Single band	8 sec (6%)	30 sec (21%)
	Dual band	8 sec (3%)	51 sec (20%)

The very simple nature of the “Call + RF test” and “Call Processing only” scripts mean that no significant gain can be made from an “HS” version. However, running the standard “Call + RF test” script with Opt 02 enabled gives a gain of:

“Call + RF test”	Single band	N/A	4 sec (8%)
	Dual band	N/A	8 sec (11%)

The following gains are made using a typical Final Test script that one of our largest customers uses with Nokia mobiles:

“Typical Nokia Final Test”	Dual band	5 sec (6%)	25 sec (30%)
	Tri band	11 sec (10%)	39 sec (34%)

Reducing Burst Counts

Although the above tests were all carried out on a “like-for-like” basis, with no change to any test parameters, we have also investigated the effect of reducing the number of bursts used by certain tests, and have found that further time savings can be made with minimal effect on accuracy.

By modifying the following setup statements at the start of our scripts such that:

Set_TxFreq_Bursts 20	becomes:	Set_TxFreq_Bursts 6
Set_RmsPhase_Bursts 20	becomes:	Set_RmsPhase_Bursts 2
Set_PeakPhase_Bursts 20	becomes:	Set_PeakPhase_Bursts 4

a further reduction in test time can be gained. See right-hand column below:

		Time saved by using:
		“HS” script, Opt 2 disabled	“HS” script, Opt 2 enabled	"HS”, Optim Bursts, Opt 2 enabled
“Brief”	Single band	5 sec (6%)	22 sec (27%)	29 sec (35%)
	Dual band	11 sec (8%)	40 sec (29%)	55 sec (40%)
“Comprehensive”	Single band	8 sec (6%)	30 sec (21%)	38 sec (27%)
	Dual band	8 sec (3%)	51 sec (20%)	67 sec (27%)
“Typical Nokia Final Test”	Dual band	5 sec (6%)	25 sec (30%)	30 sec (36%)
	Tri band	11 sec (9%)	39 sec (30%)	46 sec (36%)

Note

All the above tests include a number of factors that are beyond the control of the test set, i.e. the time taken for a mobile to register, for the user to answer a call, place a call, close a call, and conduct a speech quality test. In calculating the above percentage gains, the following allowances have been made for these activities:

• “Brief”, “Comprehensive”, “Call & RF Test”, “Call Processing Only”: 30 sec.
• “Typical Nokia Final Test” (dual band): 25 sec.
• “Typical Nokia Final Test” (tri band): 40 sec.