Motorola Cdm Series Basic 6881091c62 D Manual

							Transceiver Performance Testing3-7
* See Table 3-4
** MDC
PL/DPL 
ModulationAs above
4th channel test frequency*
BW to narrowTEST MODE, 
Test Channel 4
TPL
DPLAs aboveDeviation:
0.25-0.5 kHz (12.5 
kHz Ch. Sp.).
0.4-0.8 kHz (20 kHz 
Ch. Sp.).
0.5-1.0 kHz (25 kHz 
Ch. Sp.). Table 3-6: Transmitter Performance Checks (Continued)
Test Name Communications Analyzer Radio Test Set Comment 
						

							3-8Transceiver Performance Testing
* See Table 3-4Table 3-7: Receiver Performance Checks
Test Name Communications Analyzer Radio Test Set Comment
Reference 
FrequencyMode: PWR MON
4th channel test frequency*
Monitor: Frequency error
Input at RF In/OutTEST MODE,
Test Channel 4 
carrier squelch 
output at 
antennaPTT to 
continuous 
(during the 
performance 
check)Frequency error to 
be ±150 Hz VHF
±150 Hz UHF
±100 Hz LowBand
Rated Audio Mode: GEN
Output level: 1.0mV RF
4th channel test frequency*
Mod: 1kHz tone at 
3kHz deviation
Monitor: DVM: AC VoltsTEST MODE
Test Channel 4 
carrier squelchPTT to OFF 
(center), meter 
selector to 
Audio PASet volume control 
to 8.12Vrms
DistortionAs above, except to distortionAs aboveAs aboveDistortion 
						

							4-1
Chapter 4
Radio Programming and Tuning Procedures
4.1 Introduction
This chapter provides an overview of the Customer Programming Software (CPS) and tuner program 
designed for use in a Windows 95/98/NT environment. An installation instruction manual is also 
included with each kit. 
Table 4-1: Software Installation Kit Radio Tuning Setup
4.2 CPS Programming Setup
The CPS programming setups, shown in Figure 4-1 through Figure 4-3, are used to program the 
radio.
Description Kit Number
Customer Programming Software (CPS+) CD
Includes CPS and PPCPSHVN9025_
Note:
Refer to the appropriate program on-line help files for detailed programming proce-
dures.
Figure 4-1: CPS Programming Setup with RIB
 RIB
RLN-4008Rx 
 
GndData Tx Data
 Cable 3080369B72 (9 PIN)
DB15
Cable 3080369B71 (25 PIN) 
Power 
Supply +13,2VDC
Programming
AARKN4081Cable 
DB25
RadioDC
RF ACC
ZWG0130338-0 
						

							4-2Radio Programming and Tuning Procedures
Figure 4-2: CPS Programming Setup Cable with Internal RIB
Figure 4-3: CPS Programming Setup Cable with Internal RIB and Rear Adapter Cable
Powe r 
Supply +13,2VDC
Programming Cable AARKN4081
 Rx Data
GndTx Data
DB25
RadioDC
RF ACC
ZWG0130339-0
Programming
AARKN4081Cable Adapter
AARLN4853Cable 
 
Rx Data
GndTx Data
DB25RadioDC
RF ACC
Powe r  
Supply +13,2VDC
ZWG0130340-0 
						

							Radio Programming and Tuning Procedures4-3
4.3 Radio Tuning Setup
A personal computer (PC), Windows 95/98/NT, and a tuner program are required to tune the radio. To 
perform the tuning procedures, the radio must be connected to the PC, radio interface box (RIB), and 
test equipment setup as shown in Figure 4-4.
Figure 4-4: Radio Tuning Test Equipment Setup with External RIB
4.3.1 Initial Test Equipment Control Settings
The initial test equipment control settings are listed in Table 4-2. 
Table 4-2: Initial Equipment Control Settings
Service Monitor Test Set Power Supply
Monitor Mode: Power MonitorSpeaker set: AVoltage: 13.2Vdc
RF Attenuation: -70 Speaker/load: 
SpeakerDC on/standby: 
Standby
AM, CW, FM: FMPTT: OFFVolt Range: 20V
Oscilloscope Source: Mod
Oscilloscope Horizontal: 10mSec/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: 20A
Wattmeter
Audio Generator
Sinad Meter
AC Voltmeter
30 dB Pad
Audio In
Tx
Rx
ReceiveTransmit
RF Generator
RIB
RLN-4008RLN4460 Te s t  B o x
 Cable 3080369B72 (9 PIN)
Program/
AARKN4083Te s t  C a b l e
Service Monitor
or Counter DB15
HLN8027Mini UHF
Cable 3080369B71 (25 PIN) Powe r 
Supply +13,2VDC 
Rx Data
GndTx Data
to BNC
RadioDC
RF ACC
ZWG0130336-0 
						

							4-4Radio Programming and Tuning Procedures
4.4 Transmitter Tuning
The following sub-sections contain the procedures to tune the radio transmitter. These procedures 
include: 
lPower Amplifier (PA) Bias Tuning
lBattery Threshold Tuning
lReference Oscillator Warp
lDAC Tuning (LowBand radios only)
lTransmit Power Tuning
lPower Amplifier (PA) Voltage Limit Tuning (VHF 1-25W and UHF 1-25W LDMOS radios only)
lModulation Balance Attenuation
lVCO Attenuation
lDTMF Deviation
lMDC1200 Deviation
4.4.1 Power Amplifier (PA) Bias Tuning
Perform the PA Bias tuning procedure as follows:
1. Under the Tx Align menu, select PA  B i a s, and then High Power.
2. Measure/read the DC current drawn from the radio (varies from radio to radio). This value should 
typically range from 100-700mA. Record this value as X.
3. Press Toggle Bias button for the first bias to enable the PA bias softpot.
4. Increase softpot value to obtain Y until Y - X is within the range given for PA current in Table 4-3.
5. Press Toggle Bias for the first bias again to disable the PA bias softpot.
6. Repeat Steps 5-7 for the remaining Toggle Bias buttons.
7. Program the bias softpot values into the radio by pressing the Program button.
8. Exit the PA bias high power function. Note:
1.  If using the regulated power supply RLN4510 to measure the current drawn by 
the radio, remember that the current meter terminals only measure the voltage 
drop across a 0.1ohm shunt resistor.   Calculate the actual current being drawn 
by the radio by dividing the voltage drop across the resistor by 0.1. (V= I*R).
2.  Tuning must be performed only for High Power. The tuning screen will show up to 
three Toggle Bias buttons numbered 1, 2 and 3. Tuning must be started with the 
lowest bias number and continued until all bias points have been tuned. 
CAUTION: To prevent damage to the PA, ensure that the antenna output is always
terminated into a 50 Ohm load!
C a u t i o n 
						

							Radio Programming and Tuning Procedures4-5
Table 4-3: PA Bias Specifications*
*These values are up-to-date as of the print date. For the latest values and procedures, refer to the 
Tuner online help.
4.4.2 Reference Oscillator Warp
This procedure affects all deviation values such as DTMF and MDC1200 signaling as the frequency 
will drift if not warped properly.
Perform the oscillator warp procedure as follows:
1. Under the Tx Align menu, select Reference Oscillator Warp.
2. There is only one frequency point shown. This is always the last frequency point (F7). 
3. Click on the slider thumb. Press PTT Toggle to key up the radio at the corresponding frequency 
point. 
4. Monitor the transmit frequency. 
5. Adjust the slider, spin, or edit control until the frequency is as close as possible to the indicated 
transmit frequency. Refer to values listed in Table 4-4. Press ENTER to confirm the selection.
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.
RF Band PA TypeVo l ta g e  
Va l u eBias 1 
CurrentBias 2 
CurrentBias 3 
Current
UHF (403-470 MHz)25-40W95100-150mA130-170mANot Used
UHF (403-470 MHz) 1-25W 95 Not Used 130-170mA Not Used
UHF (450-512 MHz)25-40W95100-150mA130-170mANot Used
UHF (450-512 MHz) 
(VMOS)1-25W 95 100-150mA 130-170mA Not Used
UHF (450-512 MHz) 
(LDMOS)1-25W22Not Used370-430mANot Used
VHF (136-174 MHz) 25-45W 85 100-150mA 100-150mA Not Used
VHF (136-174 MHz)1-25W55Not Used80-120mANot Used
LowBand (29.7-36 
MHz)40-60W 63 100-150mA 100-150mA 100-150mA
LowBand (36-42 MHz)40-60W63100-150mA100-150mA100-150mA
LowBand (42-50 MHz) 40-60W 63 100-150mA 100-150mA 100-150mA
Note:
1.  Tuning of the PA BIAS must be performed first. 
2.  This operation should be performed prior to all other transmit tuning operations 
to minimize heating and the impact of warp on signaling operations.
3.  If the output power level is too low to measure the frequency, tune the transmit 
power for the highest frequency first. However, if this is done, a wait period is 
required to allow the radio chassis to cool down to approximately 25 °C before 
setting the Reference Oscillator Warp.  
						

							4-6Radio Programming and Tuning Procedures
Table 4-4: Reference Oscillator Warp Specifications*
*These values are up-to-date as of the print date. For the latest values and procedures, refer to the 
Tuner online help.
4.4.3 DAC Tuning (LowBand radios only)
Perform the DAC tuning procedure as follows:
1. Under the Tx Align menu, select Transmit Power, then select DAC.
2. Press the PTT Toggle button to key up the radio.
3. Select DAC1 by clicking on its slider bar.
4. Measure the transmit power and compare it with the specification limits for DAC1 Power as 
defined in Table 4-5.
5. If the measured transmit power is outside the specification limits, adjust the slider, spin, or edit 
control until the transmit power is within the specification limits.
6. Repeat Steps 3 - 5 for DAC2.
7. Press PTT Toggle again to dekey the radio.
8. Exit the DAC tuning function.
Table 4-5: DAC1 & DAC2 Power Specifications*
*These values are up-to-date as of the print date. For the latest values and procedures, refer to the 
Tuner online help.
RF Band Target
UHF (450-527 MHz)±30 Hz
UHF (450-512 MHz)±30 Hz
UHF (403-470 MHz)±30 Hz
VHF (136-174 MHz)±30 Hz
LowBand (29.7-36 MHz)±30 Hz
LowBand (36-42 MHz)±30 Hz
LowBand (42-50 MHz)±30 Hz
Note:1.  Tuning of the PA BIAS must be performed first.
2.  This procedure must be performed before tuning the transmitter power.
3.  If any of the DAC values exceeds the range 20-200 or the value of DAC1 is greater 
than the value of DAC2, a warning message will be displayed.
4.  The DAC values will only be updated when the radio is keyed up. If the radio is 
not keyed up, any DAC value change will be ignored.
DAC1 DAC2
30-40W70-80W 
						

							Radio Programming and Tuning Procedures4-7
4.4.4 Transmit Power Tuning
Perform the transmit high power tuning procedure as follows:
1. Under the Tx Align menu, select Transmit Power, then select K and M Tuning.
2. Select the Power 1 box for the first frequency (F1).
3. Press PTT Toggle to key up the radio.
4. Observe the power level (W) displayed on the power meter. Record this value as X.
5. Key in the value X in the Power 1 box.
6. Select the Power 2 box for the first frequency (F1).
7. Observe the power level (W) displayed on the power meter. Record this value as Y.
8. Key in the value Y in the Power 2 box.
9. Press PTT Toggle again to dekey the radio.
10. Repeat Steps 2-9 for frequency points 2 to 7.
11. Press Program to store all keyed in values into the radio.
12. Exit the K and M tuning function.
4.4.5 Power Amplifier (PA) Voltage Limit Tuning (VHF 1-25W and UHF 1-25W LDMOS 
radios only)
Perform the PA voltage limit tuning procedure as follows:
1. Under the Tx Align menu, select PA  Vo l ta g e  L i m i t.
2. Press Auto Tune and wait until all PA voltage limit softpots have been tuned.
3. Exit the PA voltage limit tuning function.Note:
1.  Tuning of the PA BIAS must be performed first.
2.  DAC Tuning must be performed first (LowBand radios only).
3.  IMPORTANT: To set the transmitter power for customer applications use the Cus-
tomer Programming Software (CPS). The following procedure should only be per-
formed if transmitter components have been changed or the radio does not 
transmit with the power set via the CPS. This tuning method is performed for mul-
tiple Transmit Power Tuning Channels.
4.  The power values displayed after opening the screen may have a small rounding 
offset.
5.  When checking the RF power output of the radio with a test set, always use a pad 
of at least 30dB attached to the radio end of the RF cable. This will avoid any RF 
mismatch and ensure a stable RF reading that will not change with varying 
lengths of connecting cable.
Note:
1.  Tuning of the transmit power must be performed first. 
2.  This method automatically tunes all PA Voltage Limit Tuning Channels. 
						

							4-8Radio Programming and Tuning Procedures
4.4.6 Modulation Balance Attenuation
Perform the modulation balance attenuation procedure as follows:
1. Under the Tx Align menu, select Mod Balance Attn.
2. Begin with the lowest frequency, i.e., the first frequency point from the top. Press PTT Toggle 
without selecting any slider control at the corresponding frequency point. This keys the radio up at 
the first frequency point.
3. Inject 80 Hz at 100mVrms.
4. Record the deviation obtained. Typical values should range from 3.5-5.5 kHz.
5. Inject 3 kHz at 100mVrms.
6. Change the modulation balance attenuation setting until the Tx deviation is as recorded in Step 4.
7. Inject 80 Hz at 100mVrms, and check the deviation again. If Tx deviation changes, note the read-
ing and repeat Steps 5, 6, and 7 until the Tx deviation remains the same.
8. Press PTT Toggle to dekey the radio. Choose the next frequency, key up, then repeat Steps 3 to 
7 until all seven tuning points are completed.
9. Program the softpot value by pressing the Program button.
10. Exit the modulation balance function.Note:
1.  When using test box RLN4460B/C, inject the signal into the radio at the METER IN 
terminal and set the METER IN selector switch to “VOL”.
2.  Tuning of the transmit power and reference oscillator warp must be performed 
first.
3.  This tuning method is performed for multiple Modulation Balance Attenuation 
Tuning Channels.
4.  Compensation alignment balances the modulation sensitivity of the VCO and ref-
erence modulation (synthesizer low frequency port) lines. The compensation 
algorithm is critical to the operation of signaling schemes that have very low fre-
quency components (i.e. DPL) and could result in distorted waveforms, If not 
adjusted properly.