Motorola Astro Digital Spectra Digital Spectra Plus Basic 6881076c20 E Manual

							6881076C20-EFebruary 3, 2003
Radio Alignment Procedure: ASTRO Digital Spectra and Digital Spectra Plus Tuner Software 6-17
2. Left-click the desired frequency field (starting with the highest frequency shown).
3. Left-click the PTT Toggle button on the screen to make the radio transmit. The screen 
indicates whether the radio is transmitting.
4. Measure the transmit power of the radio with a service monitor.
5. Adjust the softpot value until the required power, as shown in 
Table 6-4, is indicated on the 
service monitor.
6. Repeat the above process for all frequencies and all power levels.
7. Left-click the Program (Digital Spectra) or Program All (Digital Spectra Plus) button on the 
screen to dekey the radio and save the tuned values.
Left-click the Close button on the screen to return to the Transmitter Alignments menu. Table 6-4.  Transmit Power Settings
VHF Rated Output Power**Min. LevelMax. Level
10-25W 10.5W 28W
25-50W 26.5W 56W
50-110W 54W 113W
UHF Rated Output Power*Min. LevelMax. Level
6W 6W 7W
10-25W 10.5W 28W
20-40W 20.5W 45W
78W 76W 80W
15W 16W 19W
50-110W 54W 110W
800 MHz Rated Output Power**Min. LevelMax. Level
15W 15W 20W
35W (Repeater Mode) 37W 42W
30W (Talkaround Mode) 32W 42W
*These transmit power settings are used for Digital Spectra radios only.
**These transmit power settings are used for both Digital Spectra and 
Digital Spectra Plus radios. 
						

							February 3, 20036881076C20-E
6-18Radio Alignment Procedure: ASTRO Digital Spectra and Digital Spectra Plus Tuner Software
6.3.4 Transmit Current Limit Alignment
This procedure is required for mobile radios only. Transmit Current Limit adjustment is required after 
replacing (or servicing) the RF Board.
This alignment procedure limits the transmitter current drain of the radio.
1. Click on the PTT Toggle button to make the radio transmit.
2. While transmitting, measure the current drain at each of the test frequencies.
3. Re-select the frequency which had the highest current reading (This only needs to be done 
on a single frequency since all other frequencies will be adjusted automatically).
4. Adjust the softpot value by manipulating the slider bar, incrementing the New Softpot Value 
spin box, or directly entering the desired value into the New Softpot Value spin box. Using a 
service monitor to measure transmit power, decrease the softpot value from its maximum 
until the measured transmit power begins to drop.
5. Increase the softpot value by one unit.
6. Press the Program (Digital Spectra) or Program All (Digital Spectra Plus) button to save the 
tuned value in the radio.
.
Figure 6-15.  Transmit Current Limit Alignment Screen
6.3.5 Transmit Deviation Balance (Compensation) Alignment
This alignment is required after replacing (or servicing) the VOCON board or the transceiver board.
This alignment procedure balances the modulation contributions of the low- and high-frequency 
portions of a baseband signal. Proper alignment is critical to the operation of signaling schemes that 
have very low frequency components (for example, DPL) and could result in distorted waveforms if 
improperly adjusted. 
						

							6881076C20-EFebruary 3, 2003
Radio Alignment Procedure: ASTRO Digital Spectra and Digital Spectra Plus Tuner Software 6-19
This procedure needs to be performed at multiple frequencies to allow for proper alignment across 
the entire RF band. The RF band is divided into frequency zones with a calibration point (value) in 
each zone.
Proper alignment requires a modulation analyzer or meter with a frequency response to less than 
10Hz modulating frequency. The modulation analyzer settings during this test should be set for 
average deviation, a 15 kHz low-pass filter, no de-emphasis, and no high-pass filter, if these settings 
are supported.
This test can be done with either the R-2670 Communication Analyzer or the 8901_ Series 
Modulation Analyzer. The method of choice is the R-2670 analyzer.
1. Initial set up using the R-2670 Communication Analyzer:
- Connect a BNC cable between the “DEMOD OUT” port and the “VERT/SINAD DIST/DMM 
COUNTER IN” port on the R-2670.
-Press the SPF key on the R-2670 to display the “SPECIAL FUNCTIONS MENU.” Move the 
cursor to “High Pass,” and select 5 Hz on the soft key menu. Select 20 kHz for the “Low 
Pass” setting.
- In the “RF Control” section of the R-2670, enter the frequency displayed on the RSS 
screen. Move the cursor to the “B/W” setting and select “WIDE +/- 100 kHz” on the soft key 
menu.
- Place the R-2670 cursor in the “Display” zone. Select “AC VOLTS” on the soft key menu. 
Move the cursor to the “Range” setting and select “AUTO.”
2. Initial set up using the 8901_ Series Modulation Analyzer:
- Press the FM MEASUREMENT button. (The “Error 03-input level too low” indication is 
normal until an input signal is applied.)
- Simultaneously press the Peak – and Peak + buttons. Both LEDs on the buttons should 
light.
- Press the 15 kHz LP filter key.
3. Select the TX Deviation Balance alignment screen. The screen will indicate the transmit 
frequencies to be used. See 
Figure 6-16.
4. Left-click the desired frequency field (starting with the highest frequency shown).
5. Left-click the PTT Toggle button on the screen to make the radio transmit. The screen 
indicates whether the radio is transmitting. 
						

							February 3, 20036881076C20-E
6-20Radio Alignment Procedure: ASTRO Digital Spectra and Digital Spectra Plus Tuner Software
Figure 6-16.  Transmit Deviation Balance (Compensation) Alignment Screen
6. Left-click the PTT Tone: Low button.
7. Left-click the PTT Toggle button on the screen to enable transmission. The screen indicates 
whether the radio is transmitting. Wait approximately 5 seconds until the voltage shown on R-
2670, or the deviation shown on the 8901_ analyzer, stabilizes. 
8. Measure and record the ac voltage value from the R-2670 analyzer or the deviation value 
from the 8901_ series analyzer.
9. Left-click the PTT Tone: High button.
10. Adjust the softpot value until the measured deviation/voltage, when using the high tone, is 
within +/- 1.5% of the value observed when using the low tone.
11. Repeat the above process for all frequencies.
12. Left-click the Program (Digital Spectra) or Program All (Digital Spectra Plus) button on the 
screen to dekey the radio and save the tuned values.
13. Left-click the Close button on the screen to return to the Transmitter Alignments menu.
6.3.6 Transmit Deviation Limit Alignment
This alignment is required after replacing (or servicing) the VOCON board or the transceiver board.
This alignment procedure limits the modulation of a baseband signal. It is used for primary 
modulation limiting.
This procedure needs to be performed at multiple frequencies to allow for proper alignment across 
the entire RF band. The RF band is divided into frequency zones with a calibration point (value) in 
each zone. 
						

							6881076C20-EFebruary 3, 2003
Radio Alignment Procedure: ASTRO Digital Spectra and Digital Spectra Plus Tuner Software 6-21
This test can be done with either the R-2670 Communication Analyzer or the 8901_ Series 
Modulation Analyzer. The method of choice is the R-2670 analyzer.
1. Initial set up using the R-2670 Communication Analyzer:
- Connect a BNC cable between the “DEMOD OUT” port and the “VERT/SINAD DIST/DMM 
COUNTER IN” port on the R-2670.
-Press the SPF key on the R-2670 to display the “SPECIAL FUNCTIONS MENU.” Move the 
cursor to “High Pass,” and select 5 Hz on the soft key menu. Select 20 kHz for the “Low 
Pass” setting.
- In the “RF Control” section of the R-2670, enter the frequency displayed on the RSS 
screen. Move the cursor to the “B/W” setting and select “WIDE +/- 100 kHz” on the soft key 
menu.
- Place the R-2670 cursor in the “Display” zone. Select “AC VOLTS” on the soft key menu. 
Move the cursor to the “Range” setting and select “AUTO.”
2. Initial set up using the 8901_ Series Modulation Analyzer:
- Press the FM MEASUREMENT button. (The “Error 03-input level too low” indication is 
normal until an input signal is applied.)
- Simultaneously press the Peak – and Peak + buttons. Both LEDs on the buttons should 
light.
- Press the 15 kHz LP filter key.
3. Select the TX Deviation Limit alignment screen. The screen will indicate the transmit 
frequencies to be used. See 
Figure 6-17.
Figure 6-17.  Transmit Deviation Limit Alignment Screen
4. Left-click the desired frequency field (starting with the highest frequency shown). 
						

							February 3, 20036881076C20-E
6-22Radio Alignment Procedure: ASTRO Digital Spectra and Digital Spectra Plus Tuner Software
5. Left-click the PTT Toggle button on the screen to make the radio transmit. Wait 
approximately 5 seconds until the deviation/voltage displayed on the analyzer stabilizes. The 
screen indicates whether the radio is transmitting.
6. Adjust the deviation limit to within 0.158 to 0.163 Vac on the R-2670 (2.785 to 2.885 kHz). 
The optimum setting is 0.160 Vac (2.83 kHz).
7. Repeat the above process for all frequencies.
8. Left-click the Program (Digital Spectra) or Program All (Digital Spectra Plus) button on the 
screen to dekey the radio and save the tuned values.
9. Left-click the Close button on the screen to return to the Transmitter Alignments menu.
6.3.7 Bit Error Rate (BER) Test
This screen is used to test the Bit Error Rate (BER) of the radio’s receiver at a desired frequency and 
contains the following fields:
 Rx Frequency:
This field selects the Receive Frequency directly in MHz.
 Test Pattern:
This field selects the Digital test pattern — TIA. Choices are: Standard Tone Test Pattern 
(framed 1011) and Standard Interface Test Pattern (CCITT V.52).
 Modulation Type:
This field represents the digital modulation type of the incoming signal on which BER is to 
be calculated.
 Continuous Operation:
This field allows the user to make the BER test repeat indefinitely. A selection of Yes will 
cause the radio to calculate BER on a continuous basis and update the results on this 
screen after each integration time. A selection of No will cause the BER test to execute for 
only one sample of the integration time and then update the display.
NOTE:When Continuous Operation = Yes, all fields will be grayed out while test is in 
progress. They will be enabled when the test is complete, or if the STOP button is 
pressed.
When Continuous Operation = No, a wait cursor will be displayed while the test is 
in progress and return to normal when the test is done.
Audio:
This field allows the user to select the audio output during a test. Selecting Internal will 
cause the radios built-in speaker to unmute to any signals at the desired frequency that are 
present during the test. Selecting External will route the same signal to the radio’s 
accessory connector audio output. Selecting Mute will disable the audio output.
 Integration Time:
This field represents the amount of time over which the Bit Error Rate is to be calculated. 
The range is from 0.360 to 91.8 seconds in increments of 0.360 seconds. 
						

							6881076C20-EFebruary 3, 2003
Radio Alignment Procedure: ASTRO Digital Spectra and Digital Spectra Plus Tuner Software 6-23
Figure 6-18.  Bit Error Rate Test Screen
6.3.8 Transmitter Test Pattern
This screen is used to transmit specific test patterns at a desired frequency so that the user can 
perform tests on the radio’s transmitter and contains the following fields:
 Tx Frequency:
This field selects the Transmit Frequency directly in MHz.
 Channel Spacing:
This field allows the user to select the desired transmit deviation.
 Test Pattern Type:
This field represents the type of test pattern which will be transmitted by the radio when the 
PTT TOGGLE button is pressed.
NOTE:Channel Spacing and Test Pattern Type fields will be grayed out while radio is 
transmitting.
Figure 6-19.  Transmitter Test Pattern Screen 
						

							February 3, 20036881076C20-E
Notes
6-24Radio Alignment Procedure: ASTRO Digital Spectra and Digital Spectra Plus Tuner Software 
						

							Chapter 7 Encryption
7.1 Universal Crypto Module Kits
This information applies to both conventional and trunked systems.
The following tables contain the Universal Crypto Module (UCM) kits for the ASTRO Digital Spectra 
and Digital Spectra Plus radios.
7.1.1 ASTRO Digital Spectra
7.1.2 ASTRO Digital Spectra Plus
7.1.3 Secure Dispatch Operation
On personalities or talkgroups that are programmed to be secure-selectable, press and release the 
Secure button to toggle between secure and clear. 
 The secure status annunciator lit solid (ON) indicates that the transmitted signal is encrypted 
when the PTT button is pressed.Table 7-1.  ASTRO Digital Spectra UCM Listing
Kit NumberDescription
HLN1441 DES, DES-XL, DES-OFB ENCRYPTION KIT - UCM
NTN1147 DVP-XL ENCRYPTION KIT - UCM
NTN1158 DVI-XL ENCRYPTION KIT - UCM
NTN1369 DES-XL / DVP-XL ENCRYPTION KIT - UCM
NTN1565 DES-OFB / DVP-XL ENCRYPTION KIT - UCM
Table 7-2.  ASTRO Digital Spectra Plus UCM Listing
Kit NumberDescription
NNTN4024A DES, DES-XL, DES-OFB ENCRYPTION KIT - UCM
NNTN4025A DVI-XL ENCRYPTION KIT - UCM
NNTN4026A DVP-XL ENCRYPTION KIT - UCM
NNTN4027A DES, DES-XL, DES-OFB WITH DVP-XL ENCRYPTION KIT - UCM
NNTN4204A AES WITH DES ENCRYPTION KIT - UCM
NNTN4205A AES WITH DES, DES-XL, DES-OFB ENCRYPTION KIT - UCM 
						

							February 3, 20036881076C20-E
7-2Encryption: Load an Encryption Key
 The secure status annunciator not lit (OFF) indicates that the transmitted signal is non-
encrypted.
Whether the current personality is strapped for secure or clear, the secure status annunciator 
correctly displays the transmit operation as being either secure (encrypted) or clear (non-encrypted).
NOTE:You cannot change from secure to clear while the PTT button is pressed. The radio will 
generate an illegal tone and the transmission will be terminated.
Secure-equipped radios automatically determine whether a secure or clear voice message is being 
received. This allows you to receive either type of message without having to reset the 
programmable secure button.
7.1.4 Secure Emergency Operation
Clear or secure emergency-call operation is determined by the programming of the selected mode 
(or talkgroup) or the default emergency mode, if set up. Otherwise, transmit operation is controlled 
by the setting of the secure, programmable button. You will not be able to change from secure to 
clear, or from clear to secure, operation during an emergency call.
7.2 Load an Encryption Key
7.2.1 Model W3
To load an encryption key into a Model W3 radio:
1. Ensure that an encryption module is installed in the radio.
2. Load an encryption key into the radio’s memory from a key-
variable loader (KVL) using the correct loader for the radio’s 
encryption type.
To load the key, attach the keyloader cable to the front of the 
radio. (Refer to the KVL instruction manual for loading.)
3.
KEYLOADING is 
displayed on your 
radio while the key 
transfer is in progress.
For single-key radios, a short tone sounds when a key is 
successfully loaded.
For multikey radios, an alternating tone sounds for a few 
seconds after keys are successfully loaded.
NOTE:An invalid encryption key aborts a secure 
transmission. 
KEYFAIL is displayed and a keyfail tone 
(consecutive medium-pitched beeps) sounds until 
you release the PTT button.
4. If a mode is not programmed for either secure or clear-only 
operation, use the secure programmable button to select 
secure or clear transmission.
NOTE:You cannot change from secure to clear, or from clear 
to secure, while pressing the PTT button.