TB 9-4920-460-24
Table 7. TxRamp MB DAC Table Adjustment - Continued
Measuring receiver
Test instrument
indications
(dBm)
Power out
Mode
Min
Max
(dBm)
L/V 113.00 MHz
6
+3.5
+8.5
L/V 117.95 MHz
6
+3.5
+8.5
GS 108.95 (329.15) MHz
0
-2
+2
GS 109.30 (332.00) MHz
0
-2
+2
GS 110.30 (335.00) MHz
0
-2
+2
ILS 110.10 MHz
6
+3.5
+8.5
(15) Install termination cap to the TI ANTENNA connector and connect measuring
receiver to TI R/T connector.
(16) Press TI ENT then 1 (TxDirect) keys on keypad.
(17) Ensure TI display indicates 29.00 MHz.
(18) If measuring receiver does not indicate between -27 and -23 dBm, use the TI RF
OUTPUT toggle switch to adjust TI to as close as possible to nominal.
NOTE
Use the left and right arrow keys on the keyboard to move
through the TI frequencies.
(19) Repeat technique of (18) above for remaining frequencies listed in table 8.
Table 8. TxDirect COMM DAC Table Adjustment.
Measuring receiver indications
Test instrument
(dBm)
Frequency settings
Power output
Min
Max
(MHz)
(dBm)
29
-25
-27
-23
35
-25
-27
-23
45
-25
-27
-23
55
-25
-27
-23
65
-25
-27
-23
75
-25
-27
-23
85
-25
-27
-23
88
-25
-27
-23
108
-25
-27
-23
115
-25
-27
-23
125
-25
-27
-23
135
-25
-27
-23
145
-25
-27
-23
155
-25
-27
-23
165
-25
-27
-23
174
-25
-27
-23
225
-25
-27
-23
235
-25
-27
-23
245
-25
-27
-23
255
-25
-27
-23
16