TB 9-6625-2340-35
-19 dBm.
(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.
(28) Adjust signal generator No. 3 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 crt to
disappear.
(30) Press TI keys as listed in (a) through (h) below:
(a)
SCALE LIN.
(b)
SHIFT.
AUTOA.
(c)
REFERENCE LEVEL, 15, -dBm.
(d)
(e)
FREQUENCY SPAN, 0, Hz.
(f)
VIDEO BW, 30, Hz.
(g)
RES BW, 300, kHz.
(h)
MARKER NORMAL.
(31) The marker amplitude indicated on TI display should be > -50 dBm.
(32) Press TI MARKER ∆ key.
(33) Change signal generator No. 3 output level to -9 dBm.
(34) Adjust signal generator No. 3 output level for a -15.00 0.02 dBm indication on
measuring receiver.
(35) Press TI REFERENCE LEVEL, 5, and -dBm.
(36) Record the marker ∆ amplitude indicated on TI display in Displayed Amplitude
column of table 48.
Measuring receiver
Test
Indication
instrument
Level
Reference level
Displayed amplitude
(dBm)
(dBm)
(dBm)
-15
-5
(37) Press TI REFERENCE LEVEL, 15, and -dBm keys.
(38) Adjust TI AMPLITUDE CAL control to place the signal trace 1 division below
the top graticule.
(39) Press TI MARKER NORMAL and ∆ keys.
CHANGE 2 81
