TB 9-6625-2050-35
(b) POWER REF pushbutton to off (out).
(c) MODE pushbutton to WATT.
(d) RANGE HOLD pushbutton to off (out).
(3) Set range calibrator switches as listed in (a) through (c) below:
(a) FUNCTION to STANDBY.
(b) POLARITY to NORMAL.
(c) RANGE to 1 mW.
(4) Press and hold TI SENSOR ZERO pushbutton and wait for digital readout to
stabilize. TI ZERO lamp will be illuminated and digital readout will indicate between
-0.02 and +0.02.
NOTE
TI is now zeroed on most sensitive range (10 W).
(5) Release TI SENSOR ZERO pushbutton and wait for ZERO lamp to extinguish
before proceeding.
(6) Set range calibrator FUNCTION switch to CALIBRATE and verify that TI
autoranges to 1 mW range.
(7) Adjust TI CAL ADJ control to obtain a 1.000 indication on digital readout.
(8) Set CAL FACTOR % switch to positions listed in table 9.
TI will indicate
within limits specified.
b. Adjustments. No adjustments can be made.
14. Reference Oscillator Frequency Accuracy
(Models 436A and
436AOPT9/22)
a. Performance Check
(1) Press TI LINE pushbutton to ON and POWER REF pushbutton to OFF.
(2) Connect TI POWER REF OUTPUT connector to frequency counter and adjust
counter to measure frequency of 50.0 MHz.
(3) Set TI POWER REF pushbutton ON and observe indication on the counter. If
frequency counter does not indicate between 49.5 and 50.5 MHz, perform b below.