TB 9-6625-2333-24
INSTRUMENT STATE SGL SWP.
(a)
INSTRUMENT STATE SGL SWP and wait for completion of new sweep.
(b)
MARKER MKR.
(c)
[MARKER DELTA].
(d)
(7) Press synthesizer/level generator AMPLITUDE key.
(8) Press synthesizer/level generator INCR ž key.
(9) Press TI AMPLITUDE key then [REF LVL] to -60 dBm and [ATTEN] to 20 dB.
(10) Press TI INSTRUMENT STATE SGL SWP key and wait for completion of
sweep. TI ' MKR indication will be within limits specified in table 7. Record ' MKR
indication as actual ' MKR indication in table 7.
Table 7. Input Attenuator Accuracy (50 MHz)
Synthesizer/level
Test instrument
' MKR indications
generator
REF LVL
ATTEN
amplitude settings
settings
settings
(dB)
(dBm)
(dBm)
(dB)
Min
Max
Actual
-40
-60
20
+9.4
+10.6
-30
-50
30
+18.8
+21.2
-20
-40
40
+28.2
+31.8
-10
-30
50
+38.2
+41.8
0
-20
60
+48.2
+51.8
+10
-10
70
+58.2
+61.8
(11) Repeat (8) through (10) above for remaining synthesizer/level generator and TI
settings listed in table 7.
(12) Calculate the step-to-step accuracy for TI ATTEN 20 dB setting by subtracting
10 dB from the actual ' MKR indication recorded in table 7 for ATTEN 20 dB setting.
Difference will be between -0.6 and +0.6 dB.
(13) Calculate the step-to-step accuracy for TI ATTEN 30, 40, 50, 60 and 70 dB
settings by subtracting previous ATTEN setting actual ' MKR indication recorded in table
subtract 10 dB from the results. Difference will be between -0.6 and +0.6 dB for each setting.
EXAMPLE:
(Current)
(Previous)
30 dB step-to-step
TI ATTEN 20 dB
TI ATTEN 30 dB
(actual ' MKR indication
actual ' MKR indication) - 10 dB
accuracy
=
(14) Set synthesizer/level generator AMPLITUDE to +5 dBm and AMPTD INCR
to 10 dB.
(15) Press TI keys and enter values using DATA keys as listed in (a) through (j) below:
INSTRUMENT STATE PRESET.
(a)
INSTRUMENT STATE CAL.
(b)
[REALIGN LO & IF] wait for ADJUST STATUS messages to disappear.
(c)
FREQUENCY then [CENTER FREQ] to 50 MHz.
(d)
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