DNT XLP77, Service Manual

Page: 12 / 35

RECEIVER SECTION
A. Test Equipment Required
•
Standard signal generator (SSG)
•
DC power supply
•
AC level meter
• 12 dB SINAD Meter • Distortion meter
B. Alignment Procedure
Step Setting Connection Adjuster Adjust for
1
RX SINAD
PMR: (P1) 446.00625 MHz
LPD: (69) 434.775 MHz
Mic : Receive
Volume : adjust for 0.6 V on the level
meter
SSG : Audio 1 KHz
Modulation 1.5 KHz / 3.0KHz
Maximum
sensitivity
indication on
12 dB SINAD
meter.
2
RX squelch adjustment
Setting should be same as above
RV101 Max. sensitivity
indication on
12 dB SINAD
meter.
Adjust until the
audio output
appears
3
Distortion adjustment
Setting should be same as above
Connect the standard signal
Generator to the EXT-ANT
Jack.
Connect the AC volts level
meter, distortion meter
and
SINAD meter across the EXT
speaker jack with an 8 ohm dummy
load.
(Figure 4)
L106 Max. indication
on AC volts
level meter
Figure 4