TB 9-6625-2250-35
EXAMPLE:
(a) If the IF GAIN DEVIATION values in table 5 are: [REF LVL] -50 dBm = +0.2 dB
[REF LVL] -40 dBm = -0.3 dB
(b) IF GAIN CORRECTION formula listed in table 6 is: (-50) - (-40) =
(c) Substitute table 5 IF GAIN DEVIATION values for [REF LVL] settings into
formula: (-50) - (-40) = (+0.2) - (-0.3) = +0.5
(d) Then +0.5 would be recorded as IF GAIN CORRECTION (dB) factor in table 6
for [ATTEN] 20 dB setting. NOTE: Do not record EXAMPLE in table 6.
Test instrument
IF GAIN
Step-to-step
Corrected ∆ MKR
∆ MKR
[ATTEN]
CORRECTION
accuracy
settings
indications
indications
(dB)
(dB)
(dB)
(dB)
(dB)
10
0 (ref)
0 (ref)
0 (ref)
0 (ref)
20
(-50) - (-40) =
30
(-60) - (-40) =
40
(-70) - (-40) =
50
(-80) - (-40) =
60
(-90) - (-40) =
70
(-100) - (-40) =
(25) Repeat (24) above for each remaining IF GAIN CORRECTION listed in table 6.
(26) Connect equipment as shown in figure 3.
(27) Press TI keys and enter values using DATA keys as listed in (a) through (d)
below:
(a)
FREQUENCY then [CENTER FREQ] to 18 GHz.
(b)
AMPLITUDE then [REF LVL] to -10 dBm.
(c)
AMPLITUDE then [ATTEN] to 10 dB.
(d)
MARKER OFF.
