Motorola Portable Radio Ep450 Basic Hkln4215a Manual

							December 3, 2003HKLN4215A
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
AAPMKN4004 RLN5410Power  Ca ble 
						

							HKLN4215ADecember 3, 2003
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, MDC-1200 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 
						

							December 3, 2003HKLN4215A
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 (146-174)±174 Hz
UHF Band 1 (403-440)±440 Hz
UHF Band 2 (438-470)±470 Hz
UHF Band 3 (465-495)±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”.
Figure 5-4.  Modulation Balance Window 
						

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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
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.
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) 
						

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5-6Radio Alignment Procedures: Transmitter Alignment Options
5.4.3.1  To Perform Transmit High Power Tuning, do the following:
1.Under the Tx Align menu, select Transmit Power, then select High (Figure 5-5).
2.Press PTT Toggle. This will key the radio up at 1st test frequency (F1).   
3.Adjust the high power level to be as defined by Table 5-3. Move the slider/spin control or keying in 
values in the edit control (press ENTER to confirm your selection after typing in the softpot value).
4.Press PTT Toggle to dekey the radio, go to the next frequency point by selecting the slider, typing 
in the edit control box (press ENTER to confirm selection after typing in the softpot value) or tog-
gling the softpot value using the spin control. 
5.Press PTT Toggle again to key up the radio at the selected frequency point.
6.Repeat steps 3-5 for the remaining test frequencies (F2-7)
7.Press Program to store the softpot values into the radio’s codeplug.
8.Exit the Transmit High Power function.
9.If the radio uses only high power channels, proceed to adjust modulation. If low power channels 
are used, perform Transmit Low Power Tuning as defined.
5.4.3.2  To Perform Transmit Low Power Tuning, do the following: -
1.Under the Tx Align menu, select Transmit Power, and then select Low.
2.Press PTT Toggle. This will key the radio up at 1st test frequency (F1).
3.Adjust the power level to be as defined by country power level specifications by moving the 
slider/spin control or keying in values in the edit control (press ENTER to confirm your selection 
after typing in the softpot value).
4.Press PTT Toggle to dekey the radio, go to the next frequency point by selecting the slider, typing 
in the edit control box (press ENTER to confirm your selection) or toggling the softpot value using 
the spin control. 
5.Press PTT Toggle again to key up the radio at the selected frequency point.
6.Repeat steps 3-5 for the remaining test frequencies (F2-F7).
7.Press Program to store the softpot values into the radio’s codeplug.
8.Exit the Transmit Low Power function.Table 5-3.  Transmit High/Low Power Level 
RF Band (MHz) Model Number High Power(W) Low Power (W)
16 Channel VHF 146-174H65KDC9AA2AN5.2-5.51.1-1.3
64 Channel VHF 146-174 H65KDH9AA4AN 5.2-5.5 1.1-1.3
16 Channel UHF 1 403-440H65QDC9AA2AN4.2-4.51.1-1.3
64 Channel UHF 1 403-440 H65QDH9AA4AN 4.2-4.5 1.1-1.3
16 Channel UHF 2 438-470H65RDC9AA2AN4.2-4.51.1-1.3
64 Channel UHF 2 438-470 H65RDH9AA4AN 4.2-4.5 1.1-1.3
16 Channel UHF 3 465-495H65SDC9AA2AN4.2-4.51.1-1.3
64 Channel UHF 3 465-495 H65SDH9AA4AN 4.2-4.5 1.1-1.3 
						

							HKLN4215ADecember 3, 2003
Radio Alignment Procedures: Transmitter Alignment Options 5-7
5.4.4 VCO Attenuation
5.4.4.1  VCO Attenuation 25 kHz
1.Under the Tx Align menu, select VCO Attenuation 25 kHz (Figure 5-6).   
2.Begin with the lowest frequency. Select the thumb of the slider at the lowest frequency point and 
then press the PTT Toggle button to key up the radio at the corresponding frequency point. The 
spin control can also be toggled via its up/down arrow buttons. The softpot value can also be 
typed into the edit control (press ENTER to confirm your selection/send a softpot value). 
3. Inject 1 kHz at an appropriate level until 2.3 V rms is measured at the AC/DC METER (radio 
input) if using test box RLN4460.
4.Record the deviation obtained.
5.Adjust the slider; adjust the spin control or key in softpot values (press ENTER to confirm) for the 
frequency point until the deviation is within the range specified in Table 5-4.
6.Dekey the radio (Press the PTT Toggle button). Choose the next frequency, key up and repeat 
steps 3 to 6 until all seven tuning points are done. Note:
 Modulation Balance Tuning must be done first. The Transmit Deviation Limit softpot 
sets the maximum deviation of the carrier. Tuning is performed for all (12.5 kHz, 20 
kHz and 25 kHz) channel bandwidths. Tuning for 25 kHz channels must be done first 
for all frequency points. Tuning for 12.5 and 20 kHz channels determines only the off-
set to the previously tuned deviation for 25 kHz tuning channel spacing. For 12.5, and 
20kHz channels, only the last non-0 transmit frequency point (normally F7) is used 
for tuning. The 30 kHz channel bandwidths that use 5.0 kHz maximum system devia-
tion are covered by the 25 kHz tuning.
When using test box RLN4460: 
 Set the METER OUT toggle switch to the “MIC PORT” position 
 Set the METER OUT selector switch to “MIC”. 
 Inject a 1 kHz tone with the levels given below for each radio model to AUDIO IN.
 Measure the level at the radio input at the AC/DC meter.
Figure 5-6.  VCO Attenuation Window (12.5 kHz) 
						

							December 3, 2003HKLN4215A
5-8Radio Alignment Procedures: Transmitter Alignment Options
7.Program the softpot value by pressing the Program button.
8.Exit the VCO Attn. 25 kHz function.
5.4.4.2  VCO Attenuation 12.5 kHz
1.Under the Tx Align menu, select VCO Attenuation 12.5 kHz.
2.Press PTT Toggle to key up the radio at the last non-0 transmit frequency point (normally F7).
3.Inject 1 kHz at an appropriate level until 2.3 V rms is measured at the AC/DC METER (radio 
input) if using test box RLN4460.
4.Record the deviation obtained.
5.Adjust the slider, adjust the spin control or key in softpot values (press ENTER to confirm) for the 
frequency point until the deviation is within the range specified in Table 5-4.
6.Press PTT Toggle to dekey the radio.
7.Program the softpot value by pressing the Program button.
8.Exit the VCO Attenuation 12.5 kHz function.
5.4.4.3  VCO Attenuation 20 kHz
1.Under the Tx Align menu, select VCO Attenuation 20 kHz.
2.Press PTT Toggle to key up the radio at the last non-0 transmit frequency point (normally F7).
3.Inject 1 kHz: at an appropriate level until 2.3V rms is measured at the AC/DC METER (radio 
input) if using test box RLN4460.
4.Record the deviation obtained.
5.Adjust the slider; adjust the spin control or key in softpot values (press ENTER to confirm) for the 
frequency point until the deviation is within the range specified in Table 5-4.
6.Press PTT Toggle to dekey the radio.
7.Program the softpot value by pressing the Program button.
8.Exit the VCO Attn. 20 kHz function.
Table 5-4.  Deviation Specifications  Note:
 Tuning of Modulation Balance Attenuation and VCO Attenuation for 25 kHz channel 
bandwidth must be done first.
Note:
Tuning of Modulation Balance Attn. and VCO Attn. for 25 kHz channel bandwidth 
must be done first.
Band Channel Spacing Deviation (kHz)
UHF/VHF25 kHz4.40 - 4.60
UHF/VHF 12.5 kHz 2.20 - 2.30
UHF/VHF20 kHz3.40 - 3.60 
						

							HKLN4215ADecember 3, 2003
Radio Alignment Procedures: Transmitter Alignment Options 5-9
5.4.5 DTMF Deviation Tuning
This tuning option controls the Dual Tone Multi-Frequency deviation. Please note that Modulation 
Balancing and VCO Attenuation have to be performed prior to this tuning operation. Not doing so 
will result in the wrong deviation value being obtained while tuning the DTMF.
1.Under Tx Align, select DTMF Deviation (Figure 5-7).
2.Press PTT Toggle to key the radio. Monitor the deviation obtained.
3.Adjust the slider, spin or edit control (press ENTER to confirm your selection/send a softpot value) 
until a deviation of 3.1-3.4 kHz is obtained.
4.Press PTT Toggle again to dekey the radio.
5.Program the softpot value into the radio by pressing Program.
6.Exit the DTMF Deviation function.Figure 5-7.  DTMF Deviation Tuning Window 
						

							December 3, 2003HKLN4215A
5-10Radio Alignment Procedures: Receiver Tuning
5.4.6 MDC-1200 Deviation Tuning 
This tuning option controls the MDC-1200 Signaling deviation. Please note that Modulation Balancing 
and VCO Attenuation have to be performed prior to this tuning operation. Not doing so will result in 
the wrong deviation value being obtained while tuning this feature.
1.Under the Tx Align, select MDC-1200 Signaling (Figure 5-8).
2.Press PTT Toggle to key the radio up. Monitor the deviation obtained.
3.Adjust the slider, spin or edit control (press ENTER to confirm the selection/send a softpot value) 
until a deviation of 3.3-3.7 kHz is obtained.
4.Press PTT Toggle again to dekey the radio.
5.Program the softpot value into the radio by pressing the Program. 
6.Exit the MDC-1200 Deviation function.
5.5 Receiver Tuning
The following sub-sections contain the procedures to tune the radio receiver. These procedures 
include: 
 Rated Volume
 Squelch Tuning Front End Filter TuningFigure 5-8.  MDC-1200 Deviation Tuning Window 
						

							HKLN4215ADecember 3, 2003
Radio Alignment Procedures: Receiver Tuning 5-11
5.5.1 Rated Volume Tuning
Perform the rated volume tuning procedure as follows:
1.Under the Rx Align menu, select Rated Volume (Figure 5-9).
2.Inject a -47 dBm RF signal modulated with 1 kHz tone at 3 KHz (for 25 kHz channel spacing). 
3.Adjust the softpot value by using the slider, keying in the edit box (press ENTER to confirm the 
selection or send a softpot value), or via the spin controls. Repeat this until 500 mW (3.24 V) 
audio power is obtained. Rated Audio tuning is only done for 25 kHz channel spacing.
4.Press Program to commit the softpot value into the radio.
5.Exit the rated volume tuning function. Note:
When using test box RLN4460, the received audio output is taken from the AC/DC 
METER OUT terminals with the METER OUT rotary switch set to RX. The rated audio 
tuning procedure automatically configures the radio for 25 KHz. This means that a 
3 kHz (for 25 kHz channel spacing) deviation must always be used, irrespective of the 
radio channel bandwidth.
Figure 5-9.  Rated Volume Tuning Window