42
43
11. Time charts of the unit
The technical data refers to a power supply of 12V DC and an environment temperature of 25 °celsius.
11.1 Typ. time response for the sending operation as a function of the PTT
approx. 10.3 ms
11.2 ms
approx. 0.1 ms approx. 0.1 ms
approx. 6.3 ms
+5 V
0 V
+2.5 V
AF transmitter
PTT
-2.5 V
0 dB
AF transmitter
relativ to maximum
-60 dB
+2.5 V
AF transmitter
demodulatet signal
(CMTA84)
-2.5 V
(by activ LOW)
Figure 11-1: Voice and data operation
You must wait at least 0.1 ms after channel switching (e.g. SEL0) or after programming via RS232 until you can switch on the PTT
(STAST).
11.2 Typ. frequency response of the transmitter
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
5
10
0.
03
kH
z
0.
05
kH
z
0.
07
kH
z
0.
10
kH
z
0.
15
kH
z
0.
20
kH
z
0.
30
kH
z
0.
50
kH
z
0.
70
kH
z
1.
00
kH
z
1.
50
kH
z
2.
00
kH
z
3.
00
kH
z
5.
00
kH
z
7.
00
kH
z
10
.0
0
kH
z
AF Frequency in kHz
re
ce
iv
in
g
le
ve
li
n
dB
Voice
Data
Figure 11-2: Typ. frequency response of the transmitter at the data (DATA_IN) and voice input (MOD+) with an nominal
deviation
Time charts of the unit