E1968A Datasheet, PDF (19/22 Pages) Keysight Technologies – GSM/GPRS/EGPRS Test Application

19 | Keysight | E1968A GSM/GPRS/EGPRS Test Application - Technical Overview
Audio generator specifications
Frequency
Operating range
100 Hz to 20 kHz
Accuracy
Same as timebase reference
Supplemental characteristics
Typical operating range 1 Hz to 20 kHz
Frequency resolution 0.1 Hz
Output level from AUDIO OUT connector
Ranges
0 to 1 V peak, 1 to 9 V peak (into ≥ 600 Ω)
Accuracy
Distortion
< ± (1.5% of setting + resolution) when output
is DC coupled
< 0.1 percent for 0.2 to 9 V peak into ≥ 600 Ω
Pulse mode
Pulsed audio signal at a 10 Hz rate with 50
percent duty cycle, selectable as on or off
(for use with the GSM decoded audio level
measurement)
Coupling mode
Selectable as DC or AC (5 μF in series with
output)
Supplemental characteristics
Typical maximum output 100 mA peak into 8 Ω
current
Typical output
impedance
< 1.5 Ω at 1 kHz when output is DC coupled
Typical DC offset (when < 1 mV for 0 to 1 V peak output, < 10 mV peak
output is DC coupled) for 1 to 9 V peak output
Output level resolution < 0.5 mV for 0 to 1 V peak output
< 5.0 mV for 1 to 9 V peak output
GSM analog audio measurement specifications
All analog audio measurement specifications apply to signals present at
test set’s AUDIO IN ports.
De-emphasis
750 μs de-emphasis selectable as off or on
Expandor
Selectable as off or on with reference level
setting of 10 mV to 10 V
Filters
None, C-message, 50 Hz to 15 kHz band pass,
300 Hz to 15 kHz band pass, or 100 Hz
bandwidth tunable band pass, tunable over
300 Hz to 15 kHz
GSM analog audio level measurement
Types of signals
measured
Sinusoidal audio signals
Measurement frequency 100 Hz to 15 kHz
range
AUDIO IN level range 7.1 mV to 20 V peak (5 mV to 14.1 V rms)
Measurement accuracy
< ± (2 percent of reading + resolution) for
100 Hz to ≤ 8 kHz
< ± (3 percent of reading + resolution) for
> 8 to 20 kHz
Measurement THD plus < 200 μV rms
noise
Measurement detectors rms or peak
Measurement trigger
source
Immediate
Measurement
synchronization
None required
Numerical result
Audio level
Multi-measurement
capabilities
1 to 999 measurements; average, minimum,
maximum, and standard deviation results
Concurrency capabilities GSM analog audio level measurements cannot
be made concurrently with GSM multi-tone
audio, but can be made concurrently with all
other measurements
Supplemental characteristics
Typical measurement
accuracy
< ± 1.2 percent of reading for 100 Hz to ≤ 8 kHz
and 20 mV to 20 V peak
Typical external input
impedance
100 k Ω in parallel with 105 pF
Measurement resolution 0.3 percent of expected level setting or 0.2 mV,
whichever is greater