Motorola MTR2000 Manual page 31

A
L2300
C2300 C2302 L2301 L2304
IN
120uH 120uH 120uH
18pF 5.6pF
4.3pF 3.3pF
C2304 C2305
ignore
C2311 C2309
7.5pF 8.2pF
SH2300
Image Filter Service Notes
Signal
Description/Nominal Signal Levels
Path
5-pole band pass with 2 band stops suppresses image frequency.
A
Provides wide band spur suppression and matches preamp and mixer.
Input and output are both approximately 50 Ohm.
Output of Image Filter to Mixer Rf port.
B
B
C2301 L2303 L2302 C2303
OUT
120uH 33nH
470pF
4.3pF
L2305
120uH
ignore
C2310 C2306 C2312 C2307 C2308
5.1pF 6.2pF 43pF .5pF 33pF
ignore
IMAGE FILTER
A
L2600 L2601
39nH 39nH
IN
C2600
27pF
+24.5dBm
2dB Pad Service Notes
Signal
Description/Nominal Signal Levels
Path
Injection signal input from injection amplifier.
A
The 2dB Pad provides filtering of the Injection signal and matching to the mixer LO port. The
B
attenuation of the pad is approximately 1.7dB. It is used as a broadband resistive load
Injection output to Mixer LO port.
C
RECEIVER MODULE
MODEL TRD6431C/TRD6411C
B
C
R2600
10
OUT
C2601 R2601 R2602
11pF 470 470
+23 dBm
2dB PAD
68P81094E11-D
Schematics (Sheet 7 of 27)
12/26/01