Table 6-8 Transmitter Verification Specifications - Motorola DIMETRA MTS 2 Installation, Configuration And Basic Service Manual

MTS 2 and MTS 4 Installation, Configuration and Basic Service Manual
Procedure 6-7 How to Verify the Transmitter (Continued)
At the prompt, type these three commands:
4
At the prompt, type: alarms –ofault_hndlr. This command returns all active alarms of the
5
Base Radio.
At the prompt, type: power –otxch1 –a0. This command stops all transmitter activity.
6
Replace the existing cable from the Base Radio TX connector with a test cable to the TX
7
connector. Connect a 40 dB attenuator to the other end of the cable.
From the attenuator, connect a cable to the RF IN/OUT connector on the TETRA Analyzer.
8
Switch off the TETRA Analyzer. Connect the Rubidium Frequency Standard to a 10 dB
9
attenuator. Switch on the TETRA Analyzer.
Connect the other end of 10 dB attenuator to the 10 MHz REFERENCE OSCILLATOR IN/OUT
10
connector on TETRA Analyzer.
Set the TETRA Analyzer to the EXT REF mode. Set TETRA Analyzer to ON and to the proper
11
channel type.
Table 6-8 Transmitter Verification Specifications
Parameter
MTS 2 low power, RMS
power out on Antenna port
EVM, RMS average
EVM, Peak confidence
Carrier feed through /
Residual carrier
TX frequency error
6802800U74-N September 2009
• power -otxch1 -mpa_pwr_fwd. This command returns the current value of forward power
from the RF Power Amplifier.
• At the prompt, type: power -otxch1 -mpa_pwr_rev. This command returns the current
value of reflected power from the RF Power Amplifier.
• At the prompt, type: power -otxch1 -mpa_vswr. This command calculates the current
Voltage Standing Wave Ratio (VSWR) from the RF Power Amplifier.
W
dbm
%
%
%
Hz
Lower Side
Limit
10 13
40 41
-80
Transmitter Verification
Upper Side
Typical
Limit
10
30
5
80
6-25