TB 9-6625-2339-24
(5) Set RF reference source for a frequency of 50 MHz, at amplitude of -20 dBm.
(6) Press TI Peak Search (or Search) key.
(7) Convert marker amplitude reading (Mkr1) from volts to dBm using following
equation and record value in table 16.
Equation: 50 Input Marker Amptd (dBm) = 10 X Log(Mkr (V / 0.05))
Marker Amptd (dBm) __________________ dBm
(8) Subtract RF reference source output level from marker amplitude calculated in
step (7) above and record in table 16 as absolute amplitude accuracy (Log). Verify the
difference recorded in table 16 is within the limits specified.
(9) Press TI AMPLITUDE, [Scale Type] (Lin) and Peak Search (or Search) keys.
(10) Convert marker amplitude reading (Mkr1) from volts to dBm using equation in step (7)
above and record value in table 16. Verify difference recorded in table 16 is between limits specified.
Table 16. Absolute Amplitude Accuracy
Test instrument
Absolute Amplitude Accuracy
Converted
Min
Accuracy =
Max
Mkr1
Scale
amplitude
marker
converted marker amplitude (dB) 20 (dB)
type
(volts)
amplitude
(dB)
(dB)
(dB)
-20
Log
-0.34
0.34
-20
Lin
-0.34
0.34
(11) Press TI keys as listed in (a) though (d) below:
(a)
Preset. Press the Factory Preset soft key if it is displayed.
(b)
System.
(c)
[Alignments].
(d)
[Auto Align], [All].
(12) Set all outputs to minimum and disconnect equipment setup.
b. Adjustments. None.
16. Resolution Bandwidth Accuracy
a. Performance Check
(1) Connect TI 10 MHz Ref Out to RF reference source REF FREQUENCY INPUT
connector (rear panel) and RF reference source leveling head to TI RF INPUT 50.
(2) Set RF reference source output frequency to 50 MHz and output amplitude to
-5 dBm.
(3) Press TI keys as listed in (a) through (j) below:
(a)
Preset.
(b)
[Factory Preset] (if it is displayed).
(c)
System, [Alignments], [Auto Align], [Off].
(d)
Sweep, [Points 401].
(e)
FREQUENCY, 5, 0, [MHz].