Dataradio Gemini, Руководство по установке

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120 20110-100 Gemini/PD Installation Guide 18
Table 4 - Tests, Full & Half Channel Units
CHECKLIST
STEP ACTION EXPECTED RESULTS
at 25
°°°°
C
MEASURE
WITH
IF NOT?
Gemini 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 1 - GeminiPD LEDs indications
2 Connect and save
config
Press RIS Get button
as per section 4.4.1
3
Main transceiver
Output Power
Press TX (Unmod)
UHF : 40 watts
+10%, -10%
Factory-settable down
to 10 watts as per cus-
tomer request.
Service monitor
set to read power
or
50W in-line
wattmeter
Refer to factory technical support.
4 Main transceiver
Reverse Power
Press TXON (Unmod)
<1 W 50W in-line
wattmeter
check for bad connections, dam-
aged coax cable, etc.
5
Carrier Frequency
Error
Press TX (Unmod)
±300 Hz Service monitor
set to read fre-
quency error
Refer to factory technical support.
4
TX Deviation
Press
TXON (Modulated)
Carrier will be modu-
lated with a 1 kHz
tone.
Full channel unit
19.2 and 16 kb/s:
±4.0 kHz
9.6 kb/s:
±3.0 kHz
Half channel unit
9.6 kb/s:
±2.5 kHz
Tolerance is +5%, -10%
for all bit rates.
Service monitor
set to read
deviation
(IF filter set to
Mid or 30 kHz
position)
Refer to factory technical support.
5
RF Link test
"Ping" a base station
“Ping Successful”
as per sections
4.4.4.4
Check on the RIS RSSI bar graph
if the base station is within range
(i.e. better than -107dBm) or
Refer to factory technical support.
6 Set the service monitor to generate at the levels mentioned below. The carrier generated should be modu-
lated with a 1.0 kHz tone at deviation of +/- 4.0kHz (full ch.) or +/-2.5kHz (half ch.).
7
Main Receiver
RSSI checks
-70dBm
-110dBm
-120dBm
- 70 dBm +/-3
-110 dBm +/-3
-120 dBm +/- 3
RIS bar graph
Refer to factory technical support.
The RSSI checks give a good
indication of receivers' health.
8
Aux Receiver
repeat as per step 7
same as step 7 RIS bar graph Refer to factory technical support.
1 (unless you have set a lower value). Note that readings less than 40 watts 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.