TB 9-6625-2333-35
(24) Calculate the IF GAIN CORRECTION for ATTEN 20 dB setting in table 9 by
subtracting the IF GAIN DEVIATION value recorded for REF LVL 20 dBm setting in
EXAMPLE:
(a) If the IF GAIN DEVIATION values in table 8 are: REF LVL -30 dBm = +0.2 dB
REF LVL -20 dBm = -0.3 dB
(b)
(c)
Substitute table 8 IF GAIN DEVIATION values for REF LVL settings into formula:
[(-30)-(-20)] = [(+0.2)-(-0.3)] = +0.5
(d)
Then +0.5 would be recorded as IF GAIN CORRECTION (dB) factor in table 9 for
Test instrument
∆ MKR
IF GAIN
∆ MKR
ATTEN
Corrected
CORRECTION
settings
indications
indications
Limits
(dB)
(dB)
(dB)
(dB)
(dB)
10
0 (ref)
0 (ref)
0 (ref)
0 (ref)
20
[(-30) - (-20)] =
0.6
30
[(-40) - (-20)] =
1.2
40
[(-50) - (-20)] =
1.8
50
[(-60) - (-20)] =
1.8
60
[(-70) - (-20)] =
1.8
70
[(-80) - (-20)] =
1.8
(25) Repeat (24) above for each remaining IF GAIN CORRECTION listed in table 9.
(26) Connect equipment as shown in figure 2.
(27) Press TI keys and enter values using DATA keys as listed in (a) through (d) below:
(a) FREQUENCY then [CENTER FREQ] to 2.9 GHz.
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