TB 9-6625-2340-24
(34) Set up measuring receiver to measure RF power.
20 0.2 dBm
(35) Adjust synthesized signal generator No. 2 output level for a
indication on measuring receiver.
(36) Set synthesized signal generator No. 2 RF Output to off.
(37) Set synthesized signal generator No. 1 for an output frequency of 2.1005 GHz at
a level of 15 dBm.
(38) Set up measuring receiver to measure RF power.
20 0.2 dBm
(39) Adjust synthesized signal generator No. 1 output level for a
indication on measuring receiver.
(40) Set synthesized signal generator No. 1 RF Output to off.
(41) Disconnect sensor module from power splitter.
(42) Connect TI RF INPUT to the open port of the power splitter.
(43) Set synthesized signal generator No. 1 and synthesized signal generator No. 2
RF Output to on.
(44) Press TI keys as listed in (a) through (d) below:
(a) CENTER FREQUENCY, 2.0995, GHz.
(b) CF STEP SIZE, 1, MHz.
(c) FREQUENCY SPAN, 2, kHz.
(d) ATTEN, 0, dB.
(45) When sweep is complete, press TI MARKER PEAK SEARCH and MKR CF
keys and wait for completion of the sweep.
(46) Press TI MARKER , CENTER FREQUENCY, and
keys.
(47) When sweep is complete, press TI MARKER PEAK SEARCH key and record
the MKR A amplitude in peak search 1 column of table 34.
(48) Press TI , ,
keys and wait for completion of sweep.
(49) Press TI MARKER PEAK SEARCH key and record the MKR A amplitude in
peak search 2 column of table 34.
(50) Choose the smaller of the two values recorded in the peak search columns and
record the value (no sign) in Absolute Value column of table 34.
(51) Calculate the third order intercept using the formula below. Calculated value
will be within the limits specified in table 34.
Adjusted output level + absolute value/2 = third order intercept
Table 34. Third Order Intercept
Synthesized signal
Synthesized signal
generator No. 2
generator
Test instrument
Values
No. 1
Adjusted
Adjusted Center
CF
output
output
freq.
step
Peak
Peak
Calculated
Freq.
level
Freq.
level
(GHz)
size
search
search
Absolute
limit
(GHz)
(dBm)
(GHz)
(dBm)
(MHz)
1
2
value
(dB)
20
20
7
2.0995
2.1005
2.0995
1
62