065 75$16&(,9(5 ; $ ; $
Operator’s Manual • Technical Information
6076.0822.12.01 – A1.21 –
$ 8+)$XWRPDWLF)LOWHU)'
UHF Filter FD 221 can be used in all communication modes.
Only frequencies from the frequency range between 225 and 400 MHz are permitted to be
used.
Filter tuning is monitored by signal ~Tx_INHIBIT0 (contact X27.4). As long as filter tuning is in
progress, the transmitter is disabled. If tuning fails to be completed within approximately 20 s,
the message " 603: EXT PA TUNING X27" comes up.
No setup procedures are required in the M3SR Transceiver.
FD 221
M3SR Transceiver
X27
.1
.2
.4
.10
.11
.12
.13
.14
.15
.16
.17
.25
.26
.27
.28
.29
.30
.31
.32
.40
.41
.42
.43
.44
28V_SW
GND
~TX_INHIBIT0
100KHZ
1MHZ
800KHZ
8MHZ
40MHZ
GND
28V_SW
GND
25KHZ
200KHZ
2MHZ
10MHZ
100MHZ
80MHZ
28V_SW
GND
50KHZ
400KHZ
4MHZ
20MHZ
200MHZ
X30
X10
X20
to Antenna
X1
.31
.34
.18
.3
.7
.6
.10
.13
.35
.32
.36
.1
.4
.8
.11
.15
.14
.33
.19
.2
.5
.9
.12
.16
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