Measuring Nadc - Agilent Technologies EPM-P Series Programming Manual

Power Meter Remote Operation
Making Measurements on Wireless Communication Standards

Measuring NADC

The following procedure shows you how to measure the average power of
both active time slots in NADC or IS-136 'full rate' transmission. This
assumes that there are two time slots in each frame to be measured, for
example, time slots 0.
Triggering is achieved using the rising edge of the burst. The
measurement gates are configured to measure the average power in two
NADC time slots, separated by two inactive time slots. The rise time of an
NADC TDMA burst is approximately 123.5 μs (6bits) and the 'useful' part
of the burst lasts approximately 6.4 ms. Gate 1 is configured to measure
the average power in a 6.4ms period, 123.5 μs after triggering. Gate 2 is
configured to measure the average power in a 6.4ms period, 20.123 ms (3
time slots plus rise times) after triggering.
The display is configured to show the Gate 1 and Gate 2 average results in
the lower window in numeric format, while the upper window shows the
power trace starting 2 ms before the trigger.
The narrow bandwidth of the NADC signal requires only the 30 kHz
Note
bandwidth of the E9321A and E9325A sensors in the Low setting and
these are best suited. Other E9320 sensors may be used in their
lowest setting but they provide less dynamic range and low-level
stability.
*CLS
*RST
:SYST:ERR? <read string>
1-28
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IS-136 full rate frame
0 1 2
EPM-P Series Power Meters Programming Guide
0 1 2
Clears error queue
Resets meter settings to their
default states
The system error query
should return "0: No Error"