Motorola Pr400 Basic 6881096c24 A Manual

							6881096C24-AAugust, 2004
Performance Checks: RF Test Mode4-3
To enter test mode:
1.Turn the radio on.
Within ten seconds after the self test is complete (self test tone is heard), press SB2 (Side Button 2 in 
Figure 4-2) five times in succession. If the self test complete tone is not heard, see Error Codes 
information in Chapter 9. Entry into the test mode is indicated by a positive indicator tone followed by 
a good key chirp (GKC) upon entering test mode, the radio is in the carrier squelch mode. 
2.Press SB1 (Side Button 1) and scroll through and access test environments as shown in Table 4-
2.
3.Press SB2 and scroll through the channel spacing available as shown in Table 4-3.
4.Turn the channel selector knob to change the test channel for that environment as shown in Table 4-4.
5.Press the PTT on a test channel to cause the radio to transmit at the test frequency for the channel.
Table 4-2.  Test Environments 
No. of 
BeepsDescription Function
1
GKC*Carrier SquelchRX: unsquelch if carrier detected
TX: mic audio
1
BKC*Tone Private-Line RX: unsquelch if carrier and tone (192.8 Hz) detected
TX: mic audio + tone (192.8 Hz)
2
BKCDigital Private-LineRX: unsquelch if carrier and digital code (131) detected
TX: mic audio + digital code (131)
3
BKCDual-Tone Multiple 
FrequencyRX: unsquelch if carrier detected
TX: selected DTMF tone pair
5
BKCUnsquelch OpenRX: constant unsquelch
TX: mic audio
9
BKCHigh-Speed Signal-
ingRX: unsquelch if carrrier detected
TX: 1500 Hz tone
11
BCKCompandingRX: unsquelch if carrier detected
TX: mic audio
* “BKC” means Bad Key Chirp (low-pitched tone), “GKC” means Good Key Chirp (high-pitched 
tone).
Table 4-3.  Test Channel Spacing
No. of BKC Channel Spacing
125 kHz
2 12.5 kHz
320 kHz 
						

							August, 20046881096C24-A
4-4Performance Checks: RF Test Mode
Table 4-4.  Test Frequencies
Channel Selector 
Switch PositionTest ChannelVHF 1
(136-162 
MHz)VHF 2
(146-174 
MHz)UHF 1
(403-440 
MHz)UHF 2
(438-470 
MHz)UHF 3
(465-495 
MHz)
1 Low Power
8 High PowerTX#1 or #8
RX#1 or #8136.625146.625403.625438.625465.625
2 Low Power
9 High PowerTX#2 or #9
RX#2 or #9140.325 150.775 409.775 443.775 470.775
3 Low Power
10 High PowerTX#3 or #10
RX#3 or #10144.525155.275415.275448.275475.275
4 Low Power
11 High PowerTX#4 or #11
RX#4 or #11148.875 160.125 421.125 454.125 480.125
5 Low Power
12 High PowerTX#5 or #12
RX#5 or #12153.325164.475427.475459.475485.475
6 Low Power
13 High PowerTX#6 or #13
RX#6 or #13157.875 169.475 433.475 464.475 490.475
7 Low Power
14 High PowerTX#7 or #14
RX#7 or #14161.975173.875439.875469.875494.875
Table 4-5.  Receiver Performance Checks
Test Name Communications Analyzer Radio Test Set Comments
Reference 
FrequencyMode: PWR MON
4th channel test frequency
*
Monitor: Frequency error
Input at RF In/Out
TEST MODE,
Test Channel 4 
carrier squelch 
output at 
antennaPTT to continu-
ous (during the 
performance 
check)Frequency error to be 
±186 Hz VHF1
±200 Hz VHF2
±525 Hz UHF1
±568 Hz UHF2
±600 Hz UHF3
Rated Audio Mode: GEN
Output level: 1.0m V RF
4th channel test frequency
*
Mod: 1 kHz tone at 
3 kHz deviation
Monitor: DVM: AC VoltsTEST MODE
Test Channel 4 
carrier squelchPTT to OFF 
(center), meter 
selector to Audio 
PASet volume control to 
3.46 Vrms
DistortionAs above, except to distortionAs aboveAs aboveDistortion 
						

							6881096C24-AAugust, 2004
Performance Checks: RF Test Mode4-5
* See Ta b l e  4 - 4
Table 4-6.  Transmitter Performance Checks
Test Name Communications Analyzer Radio Test Set Comments
Reference 
FrequencyMode: PWR MON
4th channel test frequency
*
Monitor: Frequency error
Input at RF In/Out
* See Table 4-4
TEST MODE,
Test Channel 4 
carrier squelch
Output at 
antennaPTT to continu-
ous (during the 
performance 
check)Frequency error to be 
±186 Hz VHF1
±200 Hz VHF2
±525 Hz UHF1
±568 Hz UHF2
±600 Hz UHF3
Power RF As above As above As above Refer to Maintenance 
Specifications 
Vo i c e  
ModulationMode: PWR MON
4th channel test frequency
*
atten to -70, input to RF In/
Out
Monitor: DVM, AC Volts
Set 1 kHz Mod Out level for 
0.025 Vrms at test set,
80m Vrms at AC/DC test set 
jack
As aboveAs above, meter 
selector to micDeviation:
VHF, UHF
≥ 4.0 kHz but ≤ 5.0 
kHz (25 kHz Ch Sp).
Vo i c e  
Modulation 
(internal)Mode: PWR MON
4th channel test frequency
*
atten to -70, input to RF In/
OutTEST MODE, 
Test Channel 4 
carrier squelch 
Output at 
antennaRemove modula-
tion inputPress PTT switch on 
radio. Say “four” loudly 
into the radio mic. 
Measure deviation: 
VHF, UHF
≥ 4.0 kHz but ≤ 5.0 
kHz (25 kHz Ch Sp)
DTMF 
ModulationAs above,
4th channel test frequency
*
TEST MODE, 
Test Channel 4 
DTMF 
Output at 
antennaAs aboveDeviation: 
VHF, UHF 
≥ 3.05 kHz 
but 
≤ 3.45 kHz
(25 kHz Ch Sp)
PL/DPL 
ModulationAs above
4th channel test frequency
*
BW to narrowTEST MODE, 
Test Channel 4
TPL
DPLAs above Deviation:
VHF, UHF 
≥ 500 Hz 
but 
≤ 1000 Hz
(25 kHz Ch Sp). 
						

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4-6Performance Checks: RF Test Mode 
						

							Chapter 5 Radio Alignment Procedures
5.1 Introduction
This chapter provides an overview of the Commercial Series Customer Programming Software (CPS) 
and the Global Tuner as designed for use in a Windows® 98/NT4/2000/ME/XP environment. Both 
cover all the functions of the traditional Radio Service Software (RSS) package.
They are both available in the CPS and Global Tuner (CD ROM) Kit (RVN4191). 
5.2 CPS Programming Setup
Refer to online help files for the CPS Programming procedures. (See Figure 5-1 for CPS 
Programming Setup).
Figure 5-1.  CPS Programming Setup
RIB
RLN4008 
RIB Power Supply RLN4460Te s t  B o xRx 
 
GndData Tx Data
Radio
Battery
Computer Interface          Cable
Program/
PMKN4004 Te s t  C a b l e 
						

							July, 20046881096C24-A
5-2Radio Alignment Procedures: Radio Tuning Setup
5.3 Radio Tuning Setup
A Windows 98/NT4/2000/ME/XP PC (personal computer) and Global Tuner are required to tune the 
radio. To perform the tuning procedures, the radio must be connected to the PC, RIB (Radio Interface 
Box) and Universal Test Set as shown in Figure 5-2 below. Refer to online help files for the tuning 
procedures.
Figure 5-2.  Radio Tuning Setup
Service Monitor or 
Counter
Wattmeter
Audio Generator
Sinad Meter
AC Voltmeter
30 dB Pad
30 dB Pad
  Battery 
Eliminator
Powe r  
Supply
Audio In
Tx
Rx Receive Tr a n s m i t
RF Generator BNC
RF Adaptor
5886564Z01
RIB
RLN4008
RIB Power Supply RLN4460Te s t  B o xRx 
 
GndData 
Tx Data
Radio
Computer Interface
          Cable
Program/
Test Cable
PMKN4004 RLN5410Power  Ca ble 
						

							6881096C24-AJuly, 2004
Radio Alignment Procedures: Transmitter Alignment Options 5-3
5.3.1 Initial Test Equipment Control Settings
The initial test equipment control settings are listed in Table 5-1. 
5.4 Transmitter Alignment Options
5.4.1 Reference Oscillator Warp
This is an important operation which affects all deviation values such as DTMF, MDC1200 Signaling 
etc. The frequency will drift if not warped properly. Perform this operation prior to all other transmit 
tuning operations in order to minimize heating and because of the impact of warp on signaling 
operations.Table 5-1.  Initial Equipment Control Settings
Service Monitor Test Set Power Supply
Monitor Mode: Power MonitorSpeaker set: AVoltage: 13.2 Vdc
RF Attenuation: -70 Speaker/load: 
SpeakerDC on/standby: 
Standby
AM, CW, FM: FMPTT: OFFVolt Range: 20 V
Oscilloscope Source: Mod
Oscilloscope Horizontal: 10 mSec/Div
Oscilloscope Vertical: 2.5 kHz/Div
Oscilloscope Trigger: Auto
Monitor Image: Hi
Monitor BW: Nar
Monitor Squelch: mid CW
Monitor Volume: 1/4 CWCurrent: 20 A
Note:
 When checking the RF power output of the radio with a test set, always use a pad of 
at least 30 dB attached to the radio end of the RF cable. This will avoid an RF 
mismatch and ensure a stable RF reading that will not change with varying lengths of 
connecting cable.
Figure 5-3.  Reference Oscillator Warp Window 
						

							August, 20046881096C24-A
5-4Radio Alignment Procedures: Transmitter Alignment Options
1.Under Tx Align menu, select Reference Oscillator Warp (Figure 5-3).
2.There is only 1 frequency point shown which is always the last non-0 transmit frequency point, 
which will normally be F7. 
3.Click on the slider thumb and press PTT Toggle to key up the radio at the corresponding fre-
quency point. 
4.Monitor the transmit frequency. 
5.Adjust the slider, spin or edit control (press ENTER to confirm selection/send a softpot value) until 
the frequency is as close as possible to the indicated transmit frequency. (Refer to Table 5-2).
6.Dekey the radio by pressing PTT Toggle.
7.Program the warp value into the radio by pressing the Program button.
8.Exit the Reference Oscillator Warp function.
5.4.2 Modulation Balance Attenuation
Table 5-2.  Reference Oscillator Specifications
RF Band Target
VHF Band 1 (136-162 MHz)±162 Hz
VHF Band 2 (146-174 MHz)±174 Hz
UHF Band 1 (403-440 MHz)±436 Hz
UHF Band 2 (438-470 MHz)±470 Hz
UHF Band 3 (465-495 MHz)±495 Hz
Note:
When using test box RLN4460: 
• Inject the signal into the radio via the METER IN terminal and 
 Set the METER IN selector switch to VOL.
 Inject the signal into the radio via the AUDIO IN terminal. 
 Set the METER OUT toggle switch to the “MIC PORT” position
 Set the METER OUT selector switch to “MIC”. 
						

							6881096C24-AJuly, 2004
Radio Alignment Procedures: Transmitter Alignment Options 5-5
Compensation alignment balances the modulation sensitivity of the VCO and reference modulation 
(synthesizer low frequency port) lines. The compensation algorithm is critical to the operation of 
signaling schemes that have very low frequency components (Digital Private-Line) and could result in 
distorted waveforms if improperly adjusted. To perform Modulation Balance tuning, follow the 
following steps. 
1.Under the Tx Align menu, select Mod Balance Attn (Figure 5-4).
2.Begin with the lowest frequency (i.e. the first frequency point from the top). Pressing PTT Toggle 
without selecting any slider control at the corresponding frequency point will key the radio up at 
the first frequency point.
3.Inject 80 Hz at an amplitude of 1.78 V.
4.Record the deviation obtained. Typical values should range from [(1.70-2.30 kHz. Modulation is 
only tuned in the 25 kHz channel spacing mode)].
5.Inject 3 kHz. Set the amplitude to 1.5 V.
6.Change the modulation balance attenuation setting until the Tx deviation is as recorded in step 4.
7.Inject 80 Hz at an amplitude of 1.78 V.
8.Check the deviation again. If the Tx deviation changes, record the reading and repeat steps 5-8 
until the Tx deviation remains the same.
9.Press PTT Toggle to dekey the radio. Choose the next frequency, key up and repeat steps 3 to 8 
until all seven tuning points are done.
10.Program the softpot value by pressing the Program button.
11.Exit the Modulation Balance Function.
5.4.3 Transmit Power Tuning
Figure 5-4.  Modulation Balance Window
Note:
The maximum available power level given in the table below must not be exceeded. 
There are separate alignment procedures for High and Low power. 
						

							July, 20046881096C24-A
5-6Radio Alignment Procedures: Transmitter Alignment Options
Note:When checking the RF power output of the radio with a test set, always use a pad of 
at least 30 dB attached to the radio end of the RF cable. This will avoid an RF 
mismatch and ensure a stable RF reading that will not change with varying lengths of 
connecting cable
Figure 5-5.  Transmit Power Window (High Power)