TB 9-4931-491-24
(4) Set SWEEP TIME SEC to LINE.
(5) Adjust M1H CLAMP (fig. 3) to extend the sweep 0.2 cm beyond the first graticule
line (R).
10. Dial Accuracy
a. Performance Check
(1) Repeat 7 c (1) through (8) above.
(2) Set SWEEP WIDTH between 1 and 2 MHz.
(3) Adjust CENT FREQ control until the zero frequency lock-in point is exactly
centered on oscilloscope No. 2 display.
(4) Read the error on the frequency scale.
(5) Repeat (1) through (4) above at each 50 MHz interval across the band. The
allowable error is 10 MHz.
(6) Position controls as listed in (a) through (d) below:
(a)
MODE switch to S/S.
(b)
BAND switch to 1.
(c)
CENT FREQ control to 10 MHz.
(d)
SWEEP WIDTH control to 510 MHz.
(7) A pattern similar to figure 2 should be present on oscilloscope.
(8) Reduce SWEEP WIDTH control until the 500 MHz marker just disappears from
the right side of the oscilloscope display.
(9) Read the error on the STOP frequency indication (red).
(10) Repeat (6) through (9) above at each 50 MHz interval. Allowable error is 10 MHz.
(11) Set TI MODE switch to CW and OUTPUT switch to 0 dBm.
(12) Remove the crystal detector from RF OUT jack.
(13) Connect measuring receiver sensor module to the power reference output.
Perform sensor zero and calibration.
(14) Disconnect measuring receiver sensor module from power reference output and
connect to TI RF OUTPUT.
(15) Configure measuring receiver for frequency measurement.
(16) Adjust CENT FREQ control to 50 MHz.
(17) Observe measuring receiver frequency reading. Allowable error is 10 MHz.
(18) Repeat technique of (14) and (15) above at each 50 MHz interval across the
band. The allowable error is 10 MHz.
