User Manual

DM15/25 Integrator’s Manual 15 OF 38
MODEL Description
DM15
800 MHz, Class 4 TDMA/AMPS, Single 5-V supply +/-10%
DM-15A,
800 MHz, Class 4 TDMA/AMPS; Class 1 Burst Data; Dual Supply required (+5v
+/-10%, 13.8v +/- 20%)
Selectable mode for Class 2 TDMA/AMPS; Class 1 Burst Data , Dual
Supply required (+5v +/-10%, 12v +/- 10%)
DM-25
800/1900 MHz, Class 4 TDMA/AMPS, Class 1 Burst Data, Dual Supply
required (+5v +/-10%, 13.8v +/- 20%)
Selectable mode for Class 2 TDMA-800/AMPS, Class 1 Burst Data ,
Dual Supply required (+5v +/-10%, 12v +/- 10%)
Note: Use of Class 2 AMPS requires heat sink of 9 deg C/Watt for full
temperature range operation.
The ground signals in DM-15/DM-25 are Analog Ground, AGND, connected to pin number 5, and
chassis Ground, GND, connected to the system connector interface through pin numbers 1, 2, 4, 17
and 18.
Following is a list of the ground pins:
Pin DM-15/DM-25 Description
1 GND Chassis Ground
4 GND Digital Ground
5 AGND Analog Ground
17 GND Digital Ground
18 GND Digital Ground
Analog Ground (AGND)
The AGND lead is the analog audio reference ground. It is the return signal for Audio To Mobile
Station (ATMS), Audio From Mobile Station (AFMS).
Electrical characteristics: I
max
< 45 mA (peak)
The AGND is connected to the chassis Ground (GND) in the ME, and only there. The application
should not be connected to neither GND nor AGND.