TB 9-6625-103-24
(13) Press TI keys as listed in (a) through (f) below.
(a)
Preset.
(b)
RF On/Off to off.
(c)
AMPD, -, 1, 0, and dBm.
(d)
FREQ, 1, 0, MHz.
(e)
RF On/Off to on.
(f)
FM, FM Source, Ext, FM DEPTH, 2, 0, kHz and FM Off/On to On.
(14) Set function generator for a 1 kHz, 2 Vp-p sine wave output and turn output on.
(15) Set measuring receiver to acquire frequency then measure frequency
modulation, with PEAK +-/2 detector.
(16) Verify that the measuring receiver indicates within limits listed in table 17.
(17) Repeat technique of (13)(d), (f), (15) and (16) above for remaining rows in
Table 17. External FM.
TI
Measuring receiver indication
FREQ
FM dev. (kHz)
Min (Hz)
Max (Hz)
10 MHz
20 kHz
18000.00
22000.00
400 kHz
360000.00
440000.00
3 GHz
20 kHz
18000.00
22000.00
400 kHz
360000.00
440000.00
(18) Set function generator for a 1 kHz, 2 Vp-p sine wave output and turn output on.
(19) Press TI FREQ, 1, 0, GHz and FM Dev, 1, 0, 0, kHz keys.
(20) Set the measuring receiver to acquire the frequency.
(21) Set the measuring receiver to measure frequency modulation and establish a
ratio reference.
(22) Set function generator to 50 Hz and press Restart on the measuring receiver.
(23) Verify that the measuring receiver FM indication is within limit specified in
(24) Repeat technique of (22) and (23) above for remaining settings listed in table 18.
Table 18. FM Flatness
Measuring receiver
Function generator
FM indication
frequency
(dB)
50 Hz
3.0
2 kHz
3.0
5 kHz
3.0
10 kHz
3.0
100 kHz
3.0
500 kHz
3.0
1 MHz
3.0
1.5 MHz
3.0
2 MHz
3.0
(25) Reduce output to minimum and disconnect equipment setup.
b. Adjustments. Refer to paragraph 6 c.