TB 9-6625-2340-24
(22) Record the marker amplitude indicated on TI display in displayed amplitude
column of table 46.
Table 46. Gain Compression (0 dBm)
Measuring receiver
Test
indication
instrument
Level
Reference level
Displayed amplitude
(dBm)
(dBm)
(dB)
0
0
(23) Calculate gain compression using the formula below. Calculated value will be
within the limits specified in table 47.
Amplitude @ 0 dBm amplitude @ 10 dBm = gain compression
Table 47. Gain Compression
( 10 to 0 dBm)
Calculated gain compression (dB)
Min
Max
1
1
(24) Press TI keys as listed in (a) through (c) below:
2-22 GHz.
(a)
SHIFT, ATTEN.
(b)
SHIFT, 0-2.5 GHz, 0, dBm.
(c)
(25) Set
synthesized signal generator No. 1 output frequency to 3.0 GHz and an
19 dBm.
output level of
(26) Press TI keys as listed in (a) through (c) below:
(a) CENTER FREQUENCY, 3, GHz.
(b) FREQUENCY SPAN, 1, MHz.
(c) ATTEN, 0, dBm.
(27) Set up measuring receiver to measure tuned RF level and manually enter
carrier frequency.
(28) Adjust synthesized signal generator No. 1 output level for a 25.00 0.05 dBm
indication on measuring receiver.
(29) Press TI MARKER PRESEL PEAK key and wait for (PEAKING!) on TI
to disappear.
(30) Press TI keys as listed in (a) through (h) below:
SCALE LIN.
(a)
SHIFT.
(b)
AUTOA.
(c)
REFERENCE LEVEL, 15, dBm.
(d)
FREQUENCY SPAN, 0, Hz.
(e)
VIDEO BW, 30, Hz.
(f)
RES BW, 300, kHz.
(g)
MARKER NORMAL.
(h)
50 dBm.
(31) The marker amplitude indicated on TI display should be
74