TB 9-5985-314-24
ALTERNATE CALIBRATION PROCESS
FOR COAXIAL CIRCULATORS (10MHZ TO 18GHZ)
NOTE
Software package USATA PD-MAT () can be used in place of
steps 1 a (1) through 1 a (35) below, verifying that the TI meets
or exceeds accuracies listed in Appendix C. Copies of the
software package are available from Commander, U. S. Army
Aviation and Missile Command, ATTN: AMSAM-TMD-LW,
Redstone Arsenal, AL 35898-5000.
1. Alternate Calibration Process for Coaxial Circulators
a. Performance Check
(1) Zero and calibrate power meter and measuring receiver RF power, then connect
equipment as shown in figure 7, Appendix E (Connect POINT A to POINT B).
(2) Adjust signal generator No. 1 to 0.960 Ghz and RF OUTPUT controls for +6
dBm.
(3) Press 4.0 SPCL keys and if the AUTO TUNING indicator light is off press the
measuring receiver FREQ and BLUE(SHIFT) AUTO TUNING keys.
(4) 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.
Test
Power
Init
First RF
Second RF
Set ref
Frequency
meter
dB reading
First
Second
cal fac
cal fac
cal fac
GHz
reading
cal point
cal point
(%)
(%)
(%)
0.960
1.000
1.030
1.060
1.090
1.100
(5) Note the power meter reading and record it as Power meter reading in table G1
alongside the appropriate test frequency.
(6) Note the measuring receiver reading and record it as Init dB reading in table G1
alongside the appropriate test frequency.
(7) Press the TI BLUE (SHIFT) key, then the SET REF (ZERO) key.
