RELM RPU416, User Manual, Page: 16 / 39

RPV516/RPU416 Adjustment Description
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Adjustment Description
Program RPV516/RPU416 by using programmer or PC software, or by manual adjustment. Now explain
how to adjust RPV516/RPU416 in manual adjust mode (refer to “software descriptions” for the manual
adjust mode and model set).
Ⅰ
. Instruments:
1. Communication analyzer 1 set
2. Spectrum analyzer 1 set
3. 3A/10V power source 1 set
4. Digital Voltmeter 1 set
5. 3A Ammeter 1 set
Ⅱ
. Adjustment:
1.Initialization
：
It is necessary to initialize the radio because there is no useful data in EEPROM after it’s
assembled. Short out the SELF points on PCB, turn on the power and two beeps sound, place the
channel selector knob at CH2 [RPV516A], CH3 [RPU416 B] or CH4 [RPU416A], then press [PTT]
while holding [MONI], the channel data and function settings are initialized. Please refer to the
chapter “software descriptions”.
2. Adjustment:
The adjustment of
RPV516/RPU416
, some are adjusted in user mode, some are in manual adjust
mode. Turn on the power, the radio enters the user mode. While pressing PTT and MONI
simultaneously, turn on the radio
， the radio enters the manual adjust mode in 3 seconds. (Refer to
the manual adjust mode in chapter of “software descriptions”).
VCO Section:
Measurement Adjustment
Item Condition
Test equipment Terminal Part Method
Specifications/Re
marks
1.Setting Power 7.5V
1.CH: TX HIGH 3.7V±0.1V
2.Transmit VCO lock
voltage
2.CH: TX LOW
TC1
Check
RPV516>0.7V
RPU416>1V
1.CH: RX HIGH 3.7V±0.1V
3.Receive VCO lock
voltage
2.CH: RX LOW
Digital Voltmeter CV
TC2
Check
RPV516>0.7V
RPU416>1V
Note:
Whether VCO is unlocked can be checked in manual adjust mode. (Signal can be transmitted in manual
mode regardless of the VCO locked or unlocked).