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Features

Specifications

Frequencies

Software

FAQs

The ANSI-95 16-channel Zebra™ is an excellent baseband W-CDMA and Multi-tone source to test power amplifiers as per ANSI-97. Sixteen data-encoded CDMA channels are digitally combined with a user selectable mixing ratio. The combined output is band limited with digital and analog filters and output as ANSI-95 baseband I and Q signals with > -70 dB of filtering. These can then modulate an external RF generator to simulate an ANSI-95 CDMA base station with up to 16 selectable Walsh channels.

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**Zebra** Features
Testing of power amps for CDMA signals IS-95 CDMA forward channel simulation (no network protocols) ACPR measurements Realistic characterization of power amplifiers as per IS-97 specifications I and Q signals can be combined with external signal (such as AGWN) I and Q outputs drives 50 Ohm Selectable Walsh (0 to 63) Selectable amplitude Modulated IF output at 70 MHz (optional)

Zebra Specifications

GENERAL SPECIFICATIONS

Chip rate
1.2288 Mbps (W-CDMA rates also available)

Pilot IS-95 forward link

16 Orthagonal Channel Selectable Walsh (0-63) with PRBS data

Clock stability TCXO 2.5 PPM from 10 degrees to 50 degrees C

Outputs 1 V, 50 ohms (I and Q)

OPTIONS

16 additional IS-95 CDMA code channels
Selectable clock source: internal or external, 10 MHz or 19.6608 MHz
External even second pulse input
GPS with phase locking (optional)
Rubidium clock source, stability 1.0 x 10 -10 ppm
Pseudorandom (PRBS) data

POWER

AC power 110/220, 50/60 Hz, 1.0 A

**Zebra** Frequencies
All CDMA Frequencies

Zebra Software

The Zebra Controller is the PC interface that enables a user of the Zebra CDMA source to control and configure the unit for desired performance. The Zebra Controller is designed to allow the user to quickly create or load a waveform and send it to the Zebra through a serial connection for transmission. Zebra Controller allows the user to load either pre-defined or custom waveform parameters into the Zebra for transmission at the appropriate time. Zebra Controller also allows the user to mark a specific waveform as the default. This allows the Zebra to operate individually without the PC by transmitting the waveform that has been marked as default. Parameters for waveforms can be created in Zebra Controller and then saved to disk for use at a later time. These saved waveforms can then be read back into the application software for loading and playing on the Zebra.

Zebra Controller also allows the user to select a clock source. The Zebra can use its internal clock or either one of two distinct external clock sources. The Zebra controls allow the user to read and send parameter information to and from the Zebra, create data for the current bank for transmission, as well as start and stop transmission. Power for Pilot, Sync, and Paging channels can be manually selected. Any remaining power will be distributed among the active traffic channels.

Another feature of the Zebra Controller is its ability to activate multiple carriers. Each waveform may have different carrier setups. The level of each of the carriers is between 0 and -40 dBm. If the particular carrier is active, it will show up as a solid green rectangle on the display. If the carrier is not active, it will show up as a hollow rectanglewith a dashed outline.

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