TB 9-5985-314-24
(6) Calculate and record the proper offset frequency and record it as the Offset
to produce a +8 dB output at offset frequency.
Power
First RF
Second RF
Set ref cal
Test
Offset
meter
Init
First
Second
cal fac
cal fac
fac
frequency
frequency
reading
dB reading
cal point
cal point
(%)
(%)
(%)
(7) Press measuring receiver 27.3 SPCL keys, enter the offset frequency from table
F1, and press the MHz key.
(8) Press the GOLD (S) TUNED RF LEVEL, 39.9, SPCL, 3.7 SPCL, and 1.9
SPCL keys then press the LOG/LIN key for dBm units.
(9) Note the power meter reading and record it as Power meter reading in table F1
alongside the appropriate test frequency.
(10) Note the measuring receiver reading and record it as Init dB reading in table F1
alongside the appropriate test frequency.
(11) Press the TI BLUE (SHIFT) key, then the SET REF (ZERO) key.
(12) Calculate the first cal point using the formula -40 + signal generator No. 1
output level - Init dB reading. (Example -40 dBm + (6 dBm) - (-1 dBm) = -33 dBm). Record
this value, as First cal point in table F1 alongside the appropriate test frequency.
(13) Set signal generator No. 1 to the level calculated in (12) above and press the
CALIBRATE key.
(14) Calculate the second cal point using the formula -80 + signal generator No. 1
output level -40 dBm to result of step (12). (Example -80 dBm + (6 dBm) - (-1 dBm) =
-73 dBm). Record this value, as Second cal point in table F1 alongside the appropriate
test frequency.
F-2