TB 9-4931-534-35
APPENDIX A - Continued
Test instrument parameters
Performance specifications
Model
Manufacturer
Insertion loss (dB Max)
Isolation (dB min)
Range (GHz)
157A28
Microlab/FXR
2 to 4
0.5
20.0
157A29
Microlab/FXR
4 to 8
0.5
20.0
7913127-1 same as 157A27
7913127-2 same as 157A28
7913127-3 same as 157A29
7923167
8 to 12.4
1.0
20
7923168
12.4 to 18
1.0
20
79231696
18 to 26.5
1.0
20
79231706 same as 1213BF1
Formula, return loss dB -20 log [(VSWR -1 + (VSWR +1)] can be used to calculate values different from those listed in
1
2If out-of-tolerance indication is obtained, provide calibration report of actual values with TI.
4Standards limitations.
6These items can only be calibrated by secondary reference levels which were issued the limited deployment standard set.
7Item part of Weinschel, Model 1415, Reflection Standard Set.
8Accuracy in VSWR value column must be calculated and converted to return loss in dB for frequencies above 1 GHz, using
Appendix B. New VSWR values must be
rounded to
nearest value listed in
Appendix B without tightening the tolerance.
A-4