TB 9-4931-535-24
Table 5. Noise
Test instrument
Average marker
amplitude
RBW-VBW-ST
ENTRY RES BW
indications
settings
(dBm)
3
kHz
< -108
1
kHz
< -111
300
Hz
< -115
100
Hz
< -122
30
Hz
< -127
10
Hz
< -132
3
Hz
< -137
b. Adjustments. Refer to paragraph 6d.
15. Low Frequency Response
a. Performance Check
(1) Ensure TI front panel inputs are open.
NOTE
60 Hz represents power line frequency; if power line frequency
is different than 60 Hz, use current power line frequency in (2)
(f) and (g) below.
(2) Press keys and enter values using ENTRY keys as listed in (a) through (g) below:
ENTRY INSTR PRESET.
(a)
RBW-VBW-ST ENTRY RES BW to 3 Hz.
(b)
RBW-VBW-ST ENTRY VIDEO BW to 1 Hz.
(c)
MARKER/CONTINUOUS ENTRY MAN SWEEP to on.
(d)
ENTRY REFERENCE LEVEL to -75 dBm.
(e)
ENTRY CENTER FREQUENCY to 60 Hz.
(f)
ENTRY CF STEP SIZE to 60 Hz.
(g)
(3) Average TI marker amplitude indication will be <-120 dBm.
(4) Press ENTRY CENTER FREQUENCY key and then ENTRY STEP
key.
Average TI marker amplitude indication will be <-120 dBm.
(5) Press ENTRY STEP key. Average TI marker amplitude indication will be <-120 dBm.
(6) Press ENTRY STEP key. Average TI marker amplitude indication will be <-120 dBm.
(7) Press ENTRY STEP key. Average TI marker amplitude indication will be <-120 dBm.
(8) Press keys and enter values using ENTRY keys as listed in (a) and (b) below:
(a) ENTRY CENTER FREQUENCY to 5 kHz.
(b) ENTRY CF STEP SIZE to 5 kHz.
(9) Repeat (3) through (7) above.
(10) Press keys and enter values using ENTRY keys as listed in (a) and (b) below:
