Technical Overviews
Self-Guided Demonstration
Minimum Equipment and Measurement Application Configuration Requirements
All demonstrations utilize an X-Series signal analyzer with N9064A-1FP, 2FP. Keystrokes surrounded by [ ] indicate front-panel hardkeys; softkey operations located on the right edge of the display are surrounded by { }.
In this document, a quick demonstration will guide you through QPSK modulation analysis measurements.
N/W9064A-1FP vector signal analysis (required)
Option 1FP is the foundation of the N9064A measurement application, offering basic vector signal analysis with SCPI programming and front panel operation on an X-Series signal analyzer. It provides:
- Spectrum analysis and time domain analysis with signal tracking
- Band power, occupied bandwidth, and ACP measurements
- Markers, marker coupling, triggering
- Time gating
- Frequency counter
- Analog demodulation measurements (AM, FM, PM)
N/W9064A-2FP flexible digital modulation analysis
Option 2FP offers a complete set of modulation quality measurements for:
- MSK, QPSK, 8PSK, BPSK, π/4 DQPSK, π/8 D8PSK, D8PSK, offset QPSK
- QAM16, 32, 64, 128, 256, 512, 1024
- DVB QAM16, 32, 64, 128, 256
- FSK 2, 4, 8, 16 states
- VSB8, VSB16
- APSK16, 32, 16 w/DVB, 32 w/DVB
- CPM
- Cellular: IS-95 base and mobile, GSM, EDGE, CDPD, NADC, PDC, PHP, 3GPP (W-CDMA)
- Wireless networking: 802.11b, HIPERLAN/1(HBR and LBR), Bluetooth®, ZigBee (802.15.4, 868/915/2450 MHz), WiSUN (MR-FSK PHY)
- Digital video: DTV8 – 16, DVB16 – 256, DVB 16APSK with code rate 2/3 to 9/10, DVB32 APSK with code rates 3/ 4 to 9/10
- Other: APCO 25, APCO 25 P2 (HCPM, HDQPSK), DECT, TETRA, VDL Mode 3, MIL-STD 188-181C, SOQPSK-TG
Demonstration
QPSK modulation analysis measurements
You can adjust the following parameters when making digital modulation measurements with VXA measurement application Option 2FP:
- Modulation format (QAM, PSK, MSK, FSK, DVBQAM, VSB, APSK)
- Symbol rate
- Measurement interval (10 to 4096)
- Points/symbol (1 to 20)
- Gain imbalance /quad skew coupling On/Off
- Measurement filter (no filter, RRC, Gaussian, EDGE, CDMA (IS-95 Base EQ), rectangular, low pass, user defined)
- Reference filter (raised cosine, RRC, Gaussian, EDGE, CDMA (IS-95 Base), rectangular, half sine, user-defined)
- Alpha/BT (0.05 to 100)
- Burst/sync search
In this demonstration, the settings for the signal generator are:
- Center frequency = 1 GHz
- Level = –10 dBm
- Symbol rate = 1 MHz
- Modulation type = QPSK
- Filter = Root Nyquist
- Filter alpha = 0.35
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