TB 9-6625-2340-24
(28) Find the largest positive deviation recorded in table 13 and record value in
column (G) of table 14 below.
(29) Find the largest negative deviation recorded in table 13 and record value in
column (H) of table 14 below.
Table 14. IF Gain Calculation Values
Table 11 values
Table 11 values
0 to 70 dBm
80 dBm to 120 dBm
Table 12 values
Table 13 values
(2 dB steps)
(0.1 dB steps)
(10 dB steps)
(10 dB steps)
(A) +
(B) -
(C) +
(D) -
(E) +
(F) -
(G) +
(H) -
(30) Add the values in columns A, E, and G. If total sum exceeds 0.6 dB, perform b below.
(31) Add the values in columns B, F and H. If total sum exceeds 0.6 dB, perform b below.
(32) Add the values in columns A, C, E, and G. If total sum exceeds 1.0 dB, perform
b below.
(33) Add the values in columns B, D, F, and H. If total sum exceeds 1.0 dB, perform
b below.
b. Adjustments
OUTPUT from TI RF INPUT.
(1) Disconnect synthesizer/level generator 50
(2) Set TI LINE switch to STANDBY.
(3) Remove TI top cover.
(4) Remove cables attached to the A3 digital storage cage.
(5) Remove digital storage cage cover.
(6) Reconnect cables to digital storage cage removed in (4) above.
(7) Set TI LINE switch to ON.
(8) Connect TI RF INPUT to TI CAL OUTPUT.
(9) Press TI 2-22 GHz key.
(10) Short A3A9TP1 to A3A9TP3 (fig. 22).
(11) Disconnect 7 (violet) cable from A4A1J1 and terminate cable into a 50
load.
(12) Press TI keys as listed in (a) through (i) below:
CENTER FREQUENCY, 100, MHz.
(a)
FREQUENCY SPAN, 0, Hz.
(b)
SWEEP SINGLE.
(c)
TRACE A CLEAR-WRITE.
(d)
MARKER NORMAL.
(e)
MARKER .
(f)
SWEEP CONT.
(g)
SHIFT.
(h)
TRACE A BLANK.
(i)
(13) Adjust A3A9R59 (fig. 22) until TI MKR
LVL indication, as indicated by TI
annotation, flickers back and forth between .00 and .10 dB.
39