Operating instructions

ACCEPTANCE TESTING
5-39
Results table 5-22 FM measurement versus deviation level (1 kHz rate)
Deviation
level
IF bandwidth Lower
limit (kHz) †
Upper
limit (kHz) †
Result
250 Hz ‡ 3 kHz 0.2275 0.2725 _______
10 kHz 30 kHz 9.4 10.6 _______
50 kHz 300 kHz 47 53 _______
75 kHz 300 kHz 70.5 79.5 _______
† The upper and lower limits in Results table 5-21, and Results table 5-22 are calculated on the
assumption that it was possible to set the exact level on the external Modulation meter. If it is not
possible to achieve this, the limits will need to be calculated for the readings obtained.
‡ For the lower deviation in Results table 5-22, subtract the residual FM reading from the measured
resu
lt.
Results table 5-23 FM demodulation oscilloscope
Carrier
frequency
(MHz)
Deviation
(kHz)
Lower
limit (kHz)
Upper
limit (kHz)
Result
300 75 67.5 82.5
_______
Results table 5-24 FM demodulation output socket
Carrier
frequency
(MHz)
Deviation
(kHz)
Lower
limit
Upper
limit
Result
300 75 4.77 V 5.83 V
_______
Results table 5-25 AM measurement versus carrier frequency (1 kHz rate)
Carrier
frequency (MHz)
Depth (%) Lower
limit (%) †
Upper
limit (%) †
Result
0.5 70 66 74 _______
500 70 66 74 _______
1050 70 66 74 _______
Results table 5-26 AM measurement versus modulation rate
Modulation
rate
Depth (%) Lower
limit (%) †
Upper
limit (%) †
Result
50 Hz 70 64 76 _______
10 kHz 70 64 76 _______