Appendix A: Installation Of T952Sm/Fl Speech And Frequency Lock Module - ASCOM H952T Installation Manual

Installation Guide
H/U952T Terminal Transmitter

Appendix A: Installation of T952SM/FL Speech and Frequency Lock Module

Board Description
Figure 6. Circuit Board for 952SM/FL.
Connections, etc.
J100
LED100
R100
R211, R212
R202, R203
Changing Reference Frequency to 2500 Hz
1 Move R212 to R211
2 Change R202 from 33 k to 39 k (tolerance 1%).
3 Change R203 from 34.8 k to 47 k (tolerance 1%).
Installation
• Plug the T952SM/FL Speech and Frequency Lock module onto the connector J200 on the
Terminal Transmitter board, see
3 July 2013 / Ver. G
R211 R212
2500 3125
Screw terminal, for speech bus (SP-bus) if system bus cabling is not
used.
Indicates frequency locking (red).
Speech bus termination resistor.
The mounted resistor indicates the reference frequency used
(default 3125 Hz).
These resistors have to be exchanged when reference
frequency 2500 Hz is used.
figure 2
952SM/FL
LED100
+
-
R100
1 2
J100
on page 3.
TD 92022EN
R202
1
R203
1
1
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