Maxon SP200/210 Radio
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.
INSTALLATION, COMMISSIONING & ALIGNMENT - Page
SP200/210
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
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.
Issue 1.0 03/01
