E1968A Datasheet, PDF (21/22 Pages) Keysight Technologies – GSM/GPRS/EGPRS Test Application

21 | Keysight | E1968A GSM/GPRS/EGPRS Test Application - Technical Overview
GSM multi-tone audio
Downlink audio measurement mode
Test set generates a multi-tone audio signal and encodes it into speech
frames sent on the downlink traffic channel; the MS decodes the received
speech frames and provides and audio output via a speaker connected to
the test set’s AUDIO IN port.
Applicable specifications GSM analog audio measurement
specifications apply to measured results
Analyzer downlink
reference level
Multi-tone audio
generator downlink
levels
Settable between 100 mV and 5 V
Total level settable between 0 and 70 percent
of 0 dB reference or 1 to 20 levels are settable
between 0 and 70 percent of 0 dB reference,
where the total level of all tones must be < 70
percent of 0 dB reference
Expected AUDIO IN peak Settable between 1 mV and 20 V peak
voltage
Uplink audio measurement mode
Test set generates a multi-tone audio signal out of the AUDIO OUT port
connected to the MS’s microphone; the MS encodes the tones into speech
frames on the uplink traffic channel and the test set decodes the received
speech frames.
Applicable specifications Audio generator specifications apply to multi-
tone audio signal at the AUDIO OUT port, GSM
decoded audio level measurement
specifications apply to measured results
Analyzer uplink
reference level
Settable between 1 and 100 percent of 0 dB
reference
Multi-tone audio
generator uplink levels
Total level settable between 0 and 4.5 V rms, or
1 to 20 levels are settable between 0 and 4.5 V
rms, where the total level of all tones must be
< 4.5 V rms
Both measurement modes
Analyzer 0 dB reference Absolute or relative
mode
Analyzer reference tone Settable between 1 and 20 Hz
Device settling time
Settable between 20 ms and 1 s
SINAD/distortion (on
audio tone 1) state
On or off
Multi-tone audio
generator frequencies
1 to 20 frequencies are settable between 10 Hz
and 4 kHz or off, 7 preset states are selectable
as multi-tone 140, multi-tone 100, single tone
300 Hz, single tone 1 kHz, single tone 3 kHz, all
tones off, and none
Multi-tone audio
analyzer frequencies
Multi-tone audio level
limits
Use multi-tone audio generator frequencies or
1 to 20 frequencies are settable between 10 Hz
and 4 kHz
Upper and lower limits are settable between
± 100 dB for 1 to 20 audio tones
Numerical results
Audio level, frequency, SINAD, distortion, total
generator audio level, total measurement audio
level, measurement mode, 0 dB reference
Graphical results
Level and frequency of each audio tone with
limits, settable marker and axes
Timebase specifications
Internal high-stability 10 MHz oven-controlled
crystal oscillator (OCXO)
Aging rates
< ± 0.1 ppm per year, < ± 0.005 ppm peak-
to-peak per day during any 24-hour period
starting 24 hours or more after a cold start
Temperature stability
< ± 0.01 ppm frequency variation from +25 °C
over the temperature range 0 to +55 °C
Warm-up times
5 minutes to be within ± 0.1 ppm of frequency
at one hour, 15 minutes to be within ± 0.01 ppm
of frequency at one hour
Supplemental characteristics
Typical accuracy after ± [(time since last calibration) x (aging rate)
a 30-minute warm-up + (temperature stability) + (accuracy of
period of continuous calibration)]
operation is derived from
Typical initial adjustment ± 0.03 ppm
External reference input
Input frequency
10 MHz
Supplemental characteristics
Input frequency range < ± 5 ppm of nominal reference frequency
Input level range
0 to +13 dBm
Input impedance
50 Ω nominal
External reference output
Output frequency
Same as timebase (internal 10 MHz OCXO or
external reference input)
Supplemental characteristics
Typical output level
≥ 0.5 V rms
Output impedance
50 Ω nominal
Remote programming
GPIB
Remote front panel
lockout
Functions implemented
IEEE standard 488.2
Allows remote user to disable the front panel
display to improve GPIB measurement speed
T6, TE0, L4, LE0, SH1, AH1, RL1, SR1, PP0,
DC1, DT0, C0, E2
Test Subscriber Identification Module
(SIM) Cards
Test SIM cards are available for purchase from Keysight
Technologies, Inc. Two types are available as follows
–– Programmed GSM SIM card micro-size:
Fits most current wireless devices (about 15 x 25 mm), part
number 08922-61887
–– Programmed UMTS SIM card micro-size:
Fits most current wireless devices (about 15 x 25 mm), part
number E5515-61286
Ordering Information
For current ordering information, please refer to the configuration
guide, literature number 5968-7873E, on the Web at
www.keysight.com/find/8960
For more information on ordering test SIM cards, visit the
Keysight site at www.parts.keysight.com