Service Manual

MM-E 2072-09333-00
2-31
2-4.10 LORD Module Test Point Data
The LORD module has several test points, which enable measurement of signal levels and frequencies
using a spectrum analyzer. Figure 2-16 provides a map of the available test points, and Figure 2-15
provides typical signal levels and frequencies at critical points (these test points are identified by a
larger type in Figure 2-16). These test points can be used for troubleshooting purposes.
Gain (dB)
-3 -2.5 0 13 10 -6 12 -4 15 -
P (dBm)
-95 -98 -100 -100 -86 -98 -104
-88±4
-97 -82
F (MHz)
FIN FIN FIN FIN FIN FIN 45.1 45.1 45.1 45.1
Designation
*1 *2 PS_OUT AMP_1 AMP_2 Second
Mixer
AMP_4 AMP_3 XTAL_OUT IF2_3
Bidirectional
IF amplifier
RX IN
Gain (dB)
-6 22 -1.5 8 -1.5 13 0 28 0 -
P (dBm)
-82 -88 -66 -67.5 -59.5 -61 -48 -48 -20 -20
F (MHz)
45.1 0.45 0.45 0.45 0.45 0.45 0.45 0.02 0.02 0.02
Designation
IF2_3 IF3_1 IF3_2 IF3_3 IF3_4 IF3_5 IF3_6 AF_2 AF_3 ADC_IN
Second
mixer
Second
IF amplifier
Second
IF amplifier
Second
IF amplifier
Gain (dB)
-6 15 -4 0 -6 -6 25 -6
P (dBm)
-25 -31
-15±4
-21 -27 -33 -6 -6 -12
F (MHz)
1.05 45.1 45.1 45.1 45.1 FOUT FOUT FOUT FOUT
Designation
DSM_N IF2_3 XTAL_OUT AMP_3 AMP_4 Second
Mixer
EX_AMP_LPF *3 EX_AMP_OUT
Attenuator
30 MHz
TX LPF
Figure 2-15. LORD Module, Typical Test Point Signal Frequencies and Levels