TB 9-6625-2296-24
(h) FIELD SELECT arrow keys ..
Highlight 11. User Defined
(i) DATA ENTRY ENTER ..........
Select 11. User Defined
DATA ENTRY 2 ......................
(j)
IF Filters
(k) DATA ENTRY 2 ......................
30 kHz
(l) DATA ENTRY 3 ......................
Post Detection
(m) DATA ENTRY 2 ......................
Low Pass
(n) DATA ENTRY 1, K .................
1 kHz
(o) Ret (F5) ....................................
Return
(6) Press FIELD SELECT arrow keys to highlight DEV function and press DATA
ENTRY ENTER key.
(7) Press DATA SCROLL arrow keys to select 2 kHz (DEV range) and press
DATA ENTRY ENTER key. Set signal generator RF output on.
(8) Press Ret (F6) and FM Z (F3) keys, and wait for zeroing process to complete.
Record TI + and - residual FM.
(9) Set signal generator for 1 kHz FM deviation and a modulation rate of 100 Hz.
Adjust the amount of deviation until measuring receiver indicates 1.000 kHz FM and press
FM Z (F3). Wait for zeroing process to complete.
(10) Algebraically subtract + residual FM recorded in (8) above from TI DEV
indication and if result is not within limits specified in table 21, perform b below.
Table 21. FM Deviation Meter Accuracy (Peak).
Signal generator
Test instrument indications
Mod
IF
LP
DEV
Min
Max
Deviation1
rate
filter
filter
range
(kHz)
(kHz)
100 Hz
1 kHz
30
kHz
1 kHz
2 kHz
0.73
1.27
100 Hz
30
kHz
30
kHz
1 kHz
50
kHz
25.9
34.1
2 kHz
30
kHz
300
kHz
9 kHz
50
kHz
26.8
33.2
2 kHz
1 kHz
300
kHz
9 kHz
2 kHz
0.76
1.24
5 kHz
1 kHz
300
kHz
15
kHz
2 kHz
0.76
1.24
5 kHz
90
kHz
300
kHz
15
kHz
100
kHz
84.4
95.6
14 kHz
90
kHz
300
kHz
30
kHz
100
kHz
84.4
95.6
14 kHz
45
kHz
300
kHz
30
kHz
50
kHz
41.2
48.8
14 kHz
10
kHz
300
kHz
30
kHz
20
kHz
9.4
10.6
14 kHz
5 kHz
300
kHz
30
kHz
10
kHz
4.6
5.4
14 kHz
2 kHz
300
kHz
30
kHz
5 kHz
1.72
2.28
14 kHz
1 kHz
300
kHz
30
kHz
2 kHz
0.76
1.24
16 kHz
1 kHz
300
kHz
30
kHz
2 kHz
0.73
1.27
16 kHz
90
kHz
300
kHz
30
kHz
100
kHz
81.7
98.3
19 kHz
90
kHz
300
kHz
30
kHz
100
kHz
81.7
98.3
19 kHz
1 kHz
300
kHz
30
kHz
2 kHz
0.73
1.27
1Adjust
measuring receiver high pass and low pass filters as required.
63