Maxon Telecom SP210 - Manual (Page 20)

Maxon SP200/210 Radio SP200/210
INSTALLATION, COMMISSIONING & ALIGNMENT - Issue 1.0
Page 4-6 03/01
EEPROM programming
Ensure that the radio has the required
customer parameters programmed, otherwise
ensure that the radio is programmed with at
least the lowest, middle and highest Rx/Tx
frequencies prior to aligning the VHF and UHF
scanning handheld series radio.
Ensure that High and Low power are
programmed.
When CTCSS and DCS performance checks
are also required, ensure that the lowest,
middle and highest Rx/Tx frequencies include:
Lowest Rx/Tx freq. ch. 67.0 Hz CTCSS
Middle Rx/Tx freq. ch. DCS Code 072
Highest Rx/Tx freq. ch. 250.3 Hz CTCSS
The middle Rx/Tx frequencies should be
halfway between the lowest and the highest
frequencies.
Programming details are given in Section 7.
4.3.1 Test Equipment Connection
Use a battery or connect the power supply
leads from the battery eliminator to the power
supply. The red, positive, lead connects to
+7.5Vdc. The black, negative, lead connects
to the negative, terminal of the power supply.
A connection diagrams are given in
Figures 4-4, 4-6 or 4-7.
Set the radio to a channel with High power.
4.3.2 Transmitter Performance Tests
Power Output
This test is only possible using the battery
eliminator.
a. Connect the transmitter to the
Communications Test Set (CTS).
b. Set the power supply to 7.5Vdc and
connect a dc voltmeter across the
power supply to monitor the supply
voltage.
c. Set the CTS to the same frequency as
the radio. Activate PTT. Check and
record the power output. The nominal
power output is 5W
±
1.5dB (3.5 to 7W)
d. Reduce the power supply voltage to
6.0Vdc and PTT. The output power
should be greater than 50% of the level
measured above.
e. Switch to a channel with a low power
and ensure that the nominal power is
1W
±
1.5dB.
Frequency Error
a. Check that the transmit frequency is within
+/- 500Hz (VHF) or +/- 750Hz (UHF) of
the frequency which is programmed
into the radio.
Deviation and Distortion
a. Set the radio to the middle Tx
frequency.
b. Set the audio signal generator to 1kHz
tone, low output impedance PTT and
adjust the AF generator level for 60%
system deviation:
12.5kHz channel spacing 1.5kHz dev.
20kHz channel spacing 2.4kHz dev.
25kHz channel spacing 3kHz dev.
c. Measure the audio distortion. This
should be less than 5%.
d. Increase the audio signal generator
level by 20dB (10x voltage). The peak
deviation should be:
12.5kHz channel spacing <= 2.25kHz dev.
20kHz channel spacing
<= 3.6kHz dev.
25kHz channel spacing <= 4.5kHz dev.
4.3.3 Receiver Performance Tests
Sensitivity
The SINAD performance test may be used to
test the sensitivity of the receiver.
a. Connect the Communications Test Set,
modulated with a 1kHz tone, to the
radio.
b. Set the frequency to correspond to the
Rx frequency of one of the channels
programmed into the radio.
c. Using the Test Box, ensure that the AF
output from the Interface Box is connected
to the CTS SINAD meter.
d. Set the volume control to mid-range.
e. Set the Test Set deviation to:
12.5kHz channel spacing 1.5kHz dev.
20kHz channel spacing 2.4kHz dev.
25kHz channel spacing 3kHz dev.
f. Adjust the RF signal generator level
until the SINAD meter reads 12dB.