IFR 2026Q, Руководство по эксплуатации

Страница: 160 / 213

ACCEPTANCE TESTING
7-14
RF leakage
Test procedure
UUT
2386/2380
Spectrum Analyzer
and Display
Initial connection
Terminate with
50 load
Two turn loop
25 mm diameter
C4670
RF
INPUT
Fig. 7-7 RF leakage test set-up
(1) Press PRESET then CAL on the spectrum analyzer.
(2) Connect the test equipment as shown in Fig. 7-7.
(3) On the UUT set source A to:
[Carr Freq] 469.03 [MHz]
[RF Level] − 30 [dB]
(4) If using the 2386 Spectrum Analyzer select
REF FREQ 469.03 MHz
SPAN/DIV 10 Hz
PEAK FIND
MKR 1 SET REF FREQ
(5) Disconnect the cable from the UUT RF output socket and place a 25 mm 2-turn loop on the
end of the cable.
(6) Connect a 50
Ω
sealed load to the UUT RF output.
(7) If using the 2386 Spectrum Analyzer select:
VOLTS/DIV
REF
LEVEL 0.1
µ
V
2nd FUNCT RF ATTEN
ß
(to set 0 dB input attenuation)
(8) Hold the 2-turn loop not less than 25 mm from the UUT at various points around its case
ensuring that the worst case leakage indicated on the spectrum analyzer does not exceed that
shown in
Table 7-25.
(9) Repeat (3) to (8) for each of the carrier frequencies shown in Table 7-25.
(10) Repeat (3) to (9) for source B.