Motorola SYSTEMS SABER SECURENET Handie-Talkie H43TUN5170CN Manuale di servizio - Pagina 12

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2. PERFORMANCE CHECKS IN AIR TEST MODE
Tables 3 and 4 outline a series of performance checks that can be done without any disassembly of the radio.
If there is an indication of a malfunction, these checks should be the first step in the fault isolation process. The
FCC requires that the frequency and deviation of the transmitting device be checked before the device is placed
in service and once annually thereafter.
When making measurements using field test equipment, allow for ±10% measurement error. The
SYSTEMS SABER radio is factory tuned using equipment of greater accuracy.
Transmitter Test:
All tests below are done with the test box PTT switch on; however, the switch must be turned off when changing
modes or channels . All of the following tests can be performed on any frequency/channel. Set power supply to
7.5V at the radio battery terminals.
Set test box METER SELECTOR switch to the MIC position. Connect ac voltmeter to AC/DC MONITOR jack on
Test Name
Tx Power
Tx Current
Tx Frequency
Error
Tx Modulator
Limiting
Tx Modulator
Sensitivity
Tx PL
Deviation
Tx Modulator
Limiting with
PL and Voice
Tx Connect
Tone Deviation
Tx Modulator
Limiting with
DPL and Voice
Tx DPL
Deviation
Tx Modulator
Limiting with
DPL and
Voice
Tx High Speed
Data Deviation
Tx Binary Path
Table 3. Transmitter Performance Checks in Air Test Mode
Mode
1
Connect remote antenna
port to power meter.
1
Connect remote antenna
port to 50 ohm load.
1
Measure Tx frequency
at remote port.
1
Audio input level =
80 mV rms; 1 kHz tone.
1
Apply 1 kHz tone. Adjust
audio input level for
3.0 kHz deviation.
2
Connect remote antenna
port to deviation meter.
Remove audio input.
2
Audio input level =
80 mV rms; 1 kHz tone.
3
Connect remote antenna
port to deviation meter.
Remove audio input.
3
Audio input level =
80 mV rms; 1 kHz tone.
4
Connect remote antenna
port to deviation meter.
Remove audio input.
4
Audio input level =
80 mV rms 1 kHz tone.
5
Connect remote antenna
port to deviation meter.
6
Special path not used
at this time.
Instructions
Specifications
6W or 2.5W
3.3 or 2.1 Amps
±500Hz maximum
5 kH maximum
deviation
2-15 mV rms
0.5-1.0 kHz
deviation
5 kHz maximum
deviation
0.8-1.2 kHz
deviation
5 kHz maximum
deviation
0.5-1.0 kHz
deviation
5 kHz maximum
deviation
2.4-3.6 kHz
deviation
Not Applicable
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