TB 9-4931-533-40
b. Adjustments. No adjustment can be made.
9. Attenuation Accuracy Dynamic Range (Auto Mode 0.01 to 18 GHz)
a. Performance Check
(1) Connect equipment as shown in figure 2, connection A, using high band probes.
(2) Adjust signal generator No. 2 for 0 dBm or less as indicated on power meter.
(3) Connect equipment as shown in figure 2, connection B.
(4) Program TI, using data entry and LOCAL PROGRAM pushbuttons as listed in
(a) through (o) below.
BAND A START FREQ - 3 GHz.
(a)
BAND A STOP FREQ - 17 GHz.
(b)
BAND A NUMBER OF TEST POINTS -15.
(c)
BAND A FREQ SPACING - LIN.
(d)
RESOLUTION DB 0.01.
(e)
BAND B START FREQ - 5.6 GHz.
(f)
BAND B STOP FREQ - 5.6 GHz.
(g)
BAND B NUMBER OF TEST POINTS -1.
(h)
BAND B FREQ SPACING - LIN.
(i)
RESOLUTION dB 0.01.
(j)
BAND C START FREQ - 9.7 GHz.
(k)
BAND C STOP FREQ - 9.7 GHz.
(l)
BAND C NUMBER OF TEST POINTS - 1.
(m)
BAND C FREQ SPACING - LIN.
(n)
RESOLUTION dB 0.01.
(o)
(5) Press REF pushbutton
(MEASUREMENT
CONTROL)
and
press
FREQUENCY BAND A pushbutton.
(6) Press RUN pushbutton (MEASUREMENT CONTROL GP).
After RUN
COMPLETE displayed proceed to (7) below.
(7) Press MEAS pushbutton (MEASUREMENT CONTROL) and FREQUENCY
BAND A pushbutton.
(8) Insert 6 dB attenuator at attenuator insertion point as shown in figure 2.
(9) Press RUN pushbutton (MEASUREMENT CONTROL).
(10) When TI indicates RUN COMPLETE, press ALL pushbutton (DISPLAY
CONTROL), step through test results by pressing FWD pushbutton while observing that
TI display indicates the measured insertion loss maximum uncertainty as listed in test
report for the attenuator ( 0.02 dB/10 dB).
NOTE
Verify results only at frequencies listed in the attenuator test
report. If test report frequencies change, reprogram TI in (4)
above for new frequencies.
