FSG 70/FSG 71M
O
PERATION
M
ANUAL
Reprint July 1998
Page
2 - 5
W. Dittel GmbH
2.4.3
Transmitter Electrical Data
Frequency range:
118.000 to 136.975MHz
Number of channels (
FSG 70
):
760
Number of channels (
FSG 71M
):
760, of which 10 frequencies may be free
programmed and permanently stored
Transmitter output:
Min. 6 Watt into 50 Ohms at nom. voltage
Type of modulation:
Amplitude modulation (6A3)
Operation:
Simplex (SCS)
Depth of modulation:
Max. 95%
Modulation limiting:
Adjustable control
Frequency deviation:
<
15
×
10
-6
Harmonic and spurious radiation:
<
2
×
10
-7
Watt
Harmonics and spurious in the range of:
108 to 118 MHz
1015 to 1045 MHz
<
2
×
10
-9
Watt
<
2
×
10
-9
Watt
Frequency response:
≤
6dB, 350 to 2,500Hz
Distortion factor, m = 85%:
<
10%
Modulation S/N ratio:
>
35db
Adjacent channel rejection:
≥
70dB at 1,250Hz, m = 60% + 10dB
Microphone input for m = 85%:
a)
Low level input:
b)
High level input:
1 to 10mV into 200
Ω
, adjustable
100 to 1000mV into 200
Ω
2.4.4
Additional features
Display lighting:
+14Vdc; 28Vdc by order or external
resistor 680 Ohms/0.5 Watt.
External audio input:
Min. 1.0V into 470 Ohms for rated
performance.
Intercom:
Through microphone input, activated by
grounding.
RX audio annunciator:
Logic HIGH (+10Vdc) in Receive and NO
SIGNAL mode.
Otherwise logic LOW (0Vdc).
