2 INSTALLATION RT2048
DELAYED KEY OPTION
To make a repeater station on a duplex channel, you need two pcs. of RT2048, one for receiving on Lo band, one
for transmitting on Hi band. To get this function, the function code has to be reprogrammed for the specified channel
in both sets. The modulation signal is taken on the earpiece from the receiver unit and led to the microphone input
of the transmitter unit. No attenuation required. The key for the transmitter unit is taken from the special option
board, Delay Key Option, to get the transmitter unit keyed approx. 10 seconds after last received signal.
Seen from component side with upper side tracks.
626622
4-0-26622
12 MUTE AF-AMP
11 KEY
10 MIC. OUT
9 MIC. IN
8 EXT. MUTE LS.
7 +13V INT.
6 DISTRESS
5 GND
4 TELEPHONE
3 AUX II
2 AUX I
1 ALARM
1
2
3
4
5
6
7
8
9
10
11
12
470
150
1M
R2
R1
R3
C1
C2
10uF
470p
T1
BC548
T2
BC548
1n
C3
C4
100n
P01
DELAYED KEY OPTION (6)
NC
Page 2-10a
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2 INSTALLATION RT2048
DELAYED KEY OPTION MODULE (6) RT2048 ECI A/S 5-0-26622/2-0-25473A 626622
POSITION DESCRIPTION MANUFACTOR TYPE PART NO.
C1-6 CAPACITOR ELECTROLYTIC 10uF 20% 25VDC ELNA RBL-25-V-100-M-V2Z-T58 14.661
C2-6 CAPACITOR CERAMIC 470pF 10% 500VDC KCK RT-HM60 SK YB 471 K 16.095
C3-6 CAPACITOR CERAMIC 1nF 10% 50VDC CL2 KCK RT-SK-HE50 SJYB 102 K 16.160
C4-6 CAPACITOR MKT 0.1uF 10% 63VDC PHILIPS 2222 370 78104 11.136
J1-6 PLUG 1/10" SIL 12 POLES EURO DIP SL 12 O Z 78.328
R1-6 RESISTOR MF 470 OHM 5% 0.33W PHILIPS 2322 187 7347 02.464
R2-6 RESISTOR MF 150k OHM 5% 0.33W PHILIPS 2322 187 73154 02.524
R3-6 RESISTOR MF 1M OHM 5% 0.33W PHILIPS 2322 187 73105 02.544
T1-6 TRANSISTOR AF BC548 NPN TO-92 PHILIPS BC548 (-A/-B/-C) 28.070
T2-6 TRANSISTOR AF BC548 NPN TO-92 PHILIPS BC548 (-A/-B/-C) 28.070
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