ACCEPTANCE TESTING
6-40
Vector bandwidth
(1) Connect the test equipment as shown in Fig. 6-23.
(2) Set the UUT to 101 MHz in Vector Mode as follows:
[Carrier Freq.]
101 MHz
[RF Level]
0 dBm [UTIL]
[Mod'n Mode]
[Vector]
[SIG GEN]
[IQ Selfcal]
(3) Set the function generator to give 0.5 V pk (into
50
Ω
) at 100 kHz sine wave.
(4) Referring to Table 6-21, set the spectrum analyzer as follows:
Reference frequency
101.1 MHz
Reference level
10 dBm
Span/div
20
kHz
Peak find
Record the marker 1 level as the reference.
Table 6-21 Vector bandwidth settings
Function generator
Spec an
MKR1 reading
Upper
sideband
100 kHz
1 MHz
3 MHz
10 MHz
101.1 MHz
102 MHz
104 MHz
111 MHz
______ ref
______ ±0.5 dB
______ ±0.5 dB
______ ±1 dB
Lower
sideband
100 kHz
1 MHz
3 MHz
10 MHz
100.9 MHz
100 MHz
98 MHz
91 MHz
______ ref
______ ±0.5 dB
______ ±0.5 dB
______ ±1 dB
(5) Again referring to Table 6-21, set the function generator and the spectrum analyzer to the
frequencies indicated, recording the marker 1 level on each occasion.
(6) Compare each level against the reference for each of the sidebands, ensuring that the
difference is within the given limits.