User guide

3
Switch Settings
The following table lists dip switch setting for DTP series.
Dip switch 4 is normally in the OFF position. When in the ON position, The perceived polarity of the phone
lines is reversed.
Modulation output is adjustable from 2 mVRMS to 565 mVRMS with 0 dBm on the phone lines. The phone
lines can be driven to 0 dBm with an RX input level from 88 mVRMS to 880 mVRMS. A 0 dBm level on the
phone line back to the remote can be produced with a mic high input between 2 mVRMS and 565 mVRMS.
Parts List
DTP Series PCB #700-DTPX-200 Rev. B
Reference Description CPI Part #
CAPACITORS
C1,18 100uF Elec Rad 208-2021-107
C2,3,5,15,16 .1uF Mono Cer Dip 208-0092-104
C4 10uF Elec Rad 208-4022-106
C6,27 1uF Elec Rad 208-4052-105
C9,10 4.7uF 100V Elec Rad 208-2062-475
C11,12 20pF Cer 208-0001-200
C13,14,17,21,22 .01uf Mono Cer Dip 208-0092-103
C23 180pF Mono Cer Dip 208-0071-181
C24 .047 Mono Cer Dip 208-0092-473
C25 2200pF Mono Cer Dip 208-0071-222
C26 1uF Elec Rad Non-Polar 208-2000-001
C28 2.2uF Elec Rad 208-4052-225
DC Remote Provides Set Switches
PTT (F1) PTT (F2) Mon (F1) Mon (F2) 1 2 3
DTP1, DTP2
& DTP3
+/- 15mA OFF OFF OFF
+/- 6mA ON OFF OFF
DTP2 & DTP3 +/- 15mA +/- 6mA OFF ON OFF
+ 15mA -6 mA ON ON OFF
+/- 6mA +/- 2.5mA OFF OFF ON
+ 6mA - 2.5mA ON OFF ON
DTP3
+ 6mA + 15mA - 2.5mA - 2.5mA OFF ON ON
+ 15mA - 15mA + 6mA - 6mA ON ON ON