TB 9-6625-2250-24
(33) Repeat technique of (31) (c) and (32) above for remaining TI [ATTEN] settings
listed in table 6.
(34) Subtract IF GAIN CORRECTION from MKR indication and record results
M corrected MKR indication for each [ATTEN] setting listed in table 6. The corrected
as
KR indication will be between 3.5 and +3.5 dB for each setting.
(35) The step-to-step accuracy for TI [ATTEN] 20 dB setting is equal to the
M
[ATTEN] 20 dB setting corrected MKR indication recorded in table 6. The corrected
KR indication will be between -1.8 and +1.8 dB.
(36) Calculate the step-to-step accuracy for TI [ATTEN] 30, 40, 50, 60 and 70 dB
settings by subtracting previous [ATTEN] setting corrected MKR indication recorded in
Difference will be between -1.8 and +1.8 dB for each setting.
EXAMPLE:
(Current)
(Previous)
30 dB step-to-step
TI [ATTEN] 30 dB
TI [ATTEN] 20 dB
accuracy
=
MKR indication
actual MKR indication)
(actual
-
b. Adjustments. No adjustments can be made.
12. IF Gain Uncertainty
a. Performance Check
(1) Connect equipment as shown in figure 4.
Figure 4. IF gain uncertainty - equipment setup.
(2) Press synthesizer/level generator keys to values listed in (a) through (c) below:
(a) FREQUENCY to 50 MHz.
(b) AMPLITUDE to +10 dBm.
(c) AMPTD INCR to 10 dB.
(3) Press TI keys and enter values using DATA keys as listed in (a) through (g) below:
(a) INSTRUMENT STATE PRESET.
