ACCEPTANCE TESTING
6-36
(15) Calculate the percentage error using the formula:
%
100
1
V
2
V
1
V
×
−
(16) Transfer the DVM to the Q output of the UUT.
(17) Repeat steps (11) to (15) above.
(18) Take the larger of the values recorded in steps (15) and (17) and record as:
Channel frequency response = ____________ % (D)
(19) Convert results
A
,
B
and
C
into a percentage ratio using the formula:
percentage ratio = antilog
⎟
⎠
⎞
⎜
⎝
⎛
×
100
20
dBc
(Reminder: do not forget the minus sign on the dBc figure!)
(20) Calculate the final 'digital modulation mode accuracy' vector error figure. The vector error is
the RSS of
A
,
B
,
C
and
D
and 0.3% DSP coding error. Hence the result is:
% vector error =
2
2
2
2
2
3
.
0
D
C
B
A
+
+
+
+
where
A
,
B
and
C
are percentages
(21) Set the UUT to [SIG GEN]
[ConFig. Select]
.
(22) Select an IF of 176 MHz using
[IF Freq. Select]
.
(23) Repeat steps (1) to (20) above.
(24) Repeat steps (1) to (23) above at a carrier frequency of 850 MHz, and 1750 MHz and
2700 MHz for 2051T and 2052T.