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  TB 9-6625-2182-35
(f)
ENTRY - FM.
(g)
DATA 20 kHz.
(h)
MODULATION SOURCE - EXT DC.
(i)
MOD - FREQ.
(j)
DATA - 1 kHz.
(k)
SHIFT.
(l)
ENTRY MOD OUT.
(m)
DATA ( +1V).
(3) Set measuring receiver to measure AM with a 300 Hz high pass filter and a
3 kHz low pass filter.
(4) Measuring receiver will indicate within limits specified in table 17.
Table 17. Incidental AM
Measuring
receiver
Peak
indication
deviation
Modulation
Carrier
<%
kHz
rate
frequency
1 GHz
1 kHz
20
0.3
(5) Set measuring receiver to measure FM with all filters off.
(6) Set audio analyzer to measure distortion.
(7) Press TI pushbuttons as listed in (a) through (f) below:
(a)
ENTRY - FREQ.
(b)
DATA - 250 MHz.
(c)
ENTRY - AMPTD.
(d)
DATA - (+10 dBm).
(e)
ENTRY - FM.
(f)
DATA - 300 kHz.
(8) Press ENTRY MOD FREQ pushbutton and enter DATA modulated
frequency for each row listed in table 18. Distortion measurement on audio analyzer will
indicate within limits specified.
Test instrument
Audio analyzer distortion
DATA
indications
modulated frequency
≤ (%)
20 Hz
2
400 Hz
2
1 kHz
2
100 kHz
2
(9) Perform steps (a) through (d) below for each row in table 19:
(a) Press TI ENTRY - FREQ pushbutton and enter DATA carrier frequency as listed.
(b) Press TI ENTRY MOD FREQ pushbutton and enter DATA modulation
frequency as listed.
15
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