TB 9-6625-2308-35
(11) Hold power meter FINE ZERO CONTROL and adjust COURSE ZERO
control for a multimeter indication of 200 V or less. Record multimeter indication.
(12) Round off indications recorded in (10) or (11) above to the nearest microvolt and
record this value as V0.
(13) Set TI POWER switch to ON position.
NOTE
Multimeter indication must be taken within 15 seconds after
ENTER key is pressed in (14) (d) below. If not, set REF
POWER to OFF and repeat (14) (a) through (e) below.
(14) Perform (a) through (e) below:
(a)
Press MENU key.
(b)
Scroll to REF POWER ON/OFF.
(c)
Press ENTER key.
(d)
Select ON and then press ENTER key.
(e)
Record multimeter indication as V1.
(16) Connect multimeter negative lead to power meter chassis ground.
(17) Record multimeter indication as VCOMP.
(18) Perform (a) through (d) below:
(a)
Press MENU key.
(b)
Scroll to REF POWER ON/OFF.
(c)
Press ENTER key.
(d)
Select OFF and then press ENTER key.
(19) Calculate the calibrator output power level using the below listed formula. If
calculated results are not between 0.981 and 1.019 mW, perform b below.
2VCOMP (V1-V0) +V02-V12
PCAL =
4R (CALIBRATION FACTOR)
Where:
PCAL
=
calibrator output power level
=
value recorded in (17) above
VCOMP
=
value recorded in (14) (e) above
V1
=
value recorded in (12) above
V0
R
=
value recorded in 7 d above (≈ 200 Ω)
CALIBRATION FACTOR
=
thermistor mount CALIBRATION FACTOR at 50 MHz
b. Adjustments
(1) To change the setting of the power output of the calibrator, you need to know the
password, if it has been set. If you do not know the password, locate jumper A2W1 located
on TI analog PC board and move A2W1 to position A.
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