DPS KDA 864, User Manual

Page: 26 / 57

SOFTWARE DETAILS • TUNE MODEM • MONITOR KDA
Tuning optimizes the signal quality of the 202 tone modem inter-
face. The receive level is automatically adjusted over a 20 dB range.
A “pad” on the input can be set for an input range of -43 to -23 dB
or for a range of -23 -3 dB. The modem transmit level is software
adjustable and, therefore, does not require the unit to be opened.
The modems are shipped from the factory with the transmit level set
a t approximately -13dBm. The transmit level is stored in NV RAM,
making it unaffected by power removal.
Tuning Procedures
1) Connect a Level Meter across the modem transmit leads. If the
modem is not connected to any terminating equipment, place a
620 ohm resistor across the leads. (A resistor is not necessary if
the modem is connected to a VF line or other terminating
device.)
2) Place transmitter on Mark (High Tone).
3) Click the appropriate signal keys to achieve a desirable transmit
level range.
4) When the level is correct, return to the monitor screen by
selecting another tab from the Monitor KDA toolbar, or select
Exit Monitor to return to the Connect to KDA screen.
Warning:
Tuning a
modem above
-2 Dbm will
cause wave
form distortion.
D-SW-709 UM00C.08103
October 22, 2001 www.dpstele.com