Atec Gigatronics-8650A Series - Manual (Page 3)

a measurement start time
and duration to measure the
average power during a spe-
cific time period of a GSM
burst signal. The graphic dis-
play provides visual feedback
if you prefer to set the gate
manually. And, of course,
there is the ability to use the
TTL signal for automatically
setting the time gate control.
CDMA
The 8650A has the wide,
80 dB single sensor dynamic
range required for CDMA
signal open-loop tests, the
speed you need to quickly
measure power during
closed-loop tests, and the
10 MHz bandwidth needed
to test third-generation
CDMA signals.
INSTANTANEOUS
PEAK POWER
You can also measure the
instantaneous peak power
level of a pulse modulated
signal with the 8650A.
A built-in delay line lets you
trigger a few nanoseconds
ahead of the pulse for rising
edge measurements. While a
built-in time base gives you
sample delay control up to
100 ms after the trigger
point with 0.5 ns resolution.
And you can view the profile
and see the exact measure-
ment point on the pulse.
MAXIMUM PEAK
POWER
The peak hold feature of the
8650A lets you display the
highest instantaneous power
measured from the time the
feature is enabled until it is
reset.
The display value tracks
the measured value only
when it is rising to a new
maximum; when the meas-
ured value falls, the display
value holds at the maximum.
SELECTED
SAMPLE
POINT
HOLD
HOLD
HOLD
(RESET)
POWER
TIME
FREQUENCY
80 dB
PO
WER
AVERAGE
POWER
GPIB CW Measurement Speed (rdgs/s)
Normal Mode >300
Swift Mode >1,750
Fast Buffered Mode >26,000
GPIB Modulated Measurement Speed (rdgs/s)
Normal Mode >150
Swift Mode >800
Fast Modulated Mode >800
Asynchronous Sample Rate 2.5–5 MHz
Maximum Diode Sensor Video Bandwidth 20 MHz
Maximum Instrument Video Bandwidth 10 MHz
Maximum Single Sensor CW Dynamic Range 90 dB
Maximum Single Sensor Modulation Dynamic Range
TDMA/GSM 60–80 dB
CDMA (IS-95) 80 dB
Wideband CDMA (10 MHz bandwidth) 80 dB
Maximum Peak Power Sensor Rise Time 100 ns
Automatic Time Gate Setting Yes
Direct Crest Factor Measurement Yes
Statistical Power Measurement Analysis Yes
Giga-tronics 8650A Features and Specifications