Dataradio G3, User Manual, Page: 75 / 88

120 20131-301 Gemini G3 - User Manual
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Table 5 - Test Checklist
TEST CHECKLIST
STEP ACTION EXPECTED RESULTS at
25
°
C
MEASURE WITH IF NOT?
GeminiG3 units are set and characterized at the factory to optimize performances. It is not recommended to try to readjust the units.
1
Power-up LED Sequence
as per
Table 2 - G3 LEDs indications
For steps below, refer to the
Maintenance ► RF Tests
WEB page
2
Transmitter Output Power
1
In “Test Tone” section of
the page
Select Unmodulated –
Press Execute
Note: Must be in Test Mode
UHF
: 40 watts
700MHz:
27 watts
800MHz
: 35 watts
Tolerance: all +10%, -10%;
Factory-settable down to 10
watts as per customer request
Service monitor
set to read power
or
50W in-line
wattmeter
Refer to factory technical
support.
3
Transmitter Reflected
Power
In “Test Tone” section of
the page
Select Unmodulated –
Press Execute
Note: Must be in Test Mode
< 5% of forward power or as
specified by System Eng. 10W in-line
wattmeter Check for bad connections,
damaged coax cable, etc.
4
Carrier Frequency Error
In “Test Tone” section of
the page
Select M odulated – Press
Execute
Note: Must be in Test Mode
< ±300 Hz @ 25
o
C ambient
or < ±1 ppm from –30 to +60
o
C
Service monitor
set to read fre-
quency error
Refer to factory technical
support.
5
TX Deviation (in kHz)
In “Test Tone” section of
the page
Select M odulated – Press
Execute
Carrier will be modulated
with a 1 kHz tone.
Refer to 5.3.1for TX Deviation
details.
Tolerance is +5%, -10%
for all bit rates
Service monitor
set to read devia-
tion
(IF filter set to
Mid or 30 kHz
position)
Refer to factory technical
support.
Set the service monitor to generate at the unit’s antenna jacks the
RF levels
mentioned below. The carrier generated
should be modulated with a 1.0 kHz tone at a deviation specified in 5.3.1.
6
Main Rx
and
Aux Rx RSSI
Navigate to “RSSI Table”
section.
Note: This test works in ei-
ther Test or EDBA mode.
The test will be executed for
the currently active channel
(activate channels using"
“Go To” option buttons).
- 70 dBm +/-3 typical
- 90 dBm +/-3 typical
-110 dBm +/-3 typical
RSSI Table bar
graph
See section
4.7.7.4
The RSSI checks give a
general indication of
receivers' health
Refer to factory technical
support only if RX data
performance degradation is
noticed combined with out-of-
tolerance RSSI readings.
1
(Unless you have set a lower value). Note that readings less than 40 watts (UHF model), 27 watts (700MHz model) and 35 watts
(800MHz model) may be due to losses in cables used for testing. Check also your wattmeter frequency calibration curve. Do not
be too ready to condemn the transmitter.