TB 9-6625-2050-24
11. Instrument Accuracy (Models 436A and 436AOPT9/22)
a. Performance Check
(1) Position controls as listed in (a) through (d) below:
(a) CAL FACTOR % switch to 100.
(b) POWER REF pushbutton to off (out).
(c) MODE switch to WATT.
(d) RANGE HOLD pushbutton to off (out).
(2) Set range calibrator switches as listed in (a) through (c) below:
(a) FUNCTION to STANDBY.
(b) POLARITY to NORMAL.
(c) RANGE to 1 mW.
(3) Press and hold TI SENSOR ZERO pushbutton and wait for digital readout to
stabilize. ZERO lamp will be illuminated and digital readout will indicate between -0.02
and +0.02.
NOTE
TI is now zeroed on the most sensitive range (10 W).
(4) Release SENSOR ZERO pushbutton and wait for ZERO lamp to extinguish
before proceeding.
(5) Set range calibrator FUNCTION switch to CALIBRATE and verify that TI
autoranges to 1 mW range.
(6) Observe digital readout and, if necessary, adjust front panel CAL ADJ control
to obtain a 1.000 mW indication.
NOTE
Range calibrator output level is adjustable in 5 dB increments.
Thus, the 3 W, 30 W, 300 W, 3 mW, and 30 mW legends on
the RANGE switch are approximations. The true outputs for
these settings are 3.16 W, 31.6 W, 316 W, 3.16 mW, and
31.6 mW.
(7) Connect multimeter to TI recorder output (rear panel).
(8) Set range calibrator to RANGE switch positions listed in table 7. If TI does not
indicate within limits, perform b below.
(9) Set range calibrator RANGE switch to -10 dBm.
(10) Press TI MODE pushbutton to dB (REF).
TI digital readout will indicate
between -0.01 and +0.01.
(11) Set range calibrator RANGE switch and TI RANGE switches to settings listed
in table 8. If TI does not indicate within limits specified, perform b below.
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